Calculators for students
Grades, GPA, percentages, equations and exam dates.
Personal Finance
- Finance (TVM) CalculatorSolve for periods, interest rate, present value, payment or future value, like a financial calculator.
- Simple Interest CalculatorFind the interest and total amount on a principal at a flat rate over a set period.
- Future Value CalculatorCalculate what a lump sum or series of payments will be worth at a future date.
- Present Value CalculatorDiscount a future amount or stream of payments back to its value in today's money.
- Effective Annual Rate CalculatorCompare nominal rates with different compounding periods by converting them to one effective yearly rate.
- Continuous Compounding CalculatorCalculate growth when interest compounds continuously using the e^rt formula.
Investing
Loans & Mortgages
- HECS-HELP Repayment CalculatorWork out your compulsory HELP student loan repayment for 2026–27.
- Student Loan CalculatorPlan student loan repayment and see how extra payments cut interest.
- UK Student Loan Repayment CalculatorEstimate UK student loan deductions by plan type and whether the balance will be written off.
- Education Loan EMI CalculatorCalculate education loan EMIs including the moratorium period interest.
Health
Math
- Percent, Decimal & Fraction ConverterConvert between percentages, decimals and fractions with steps.
- Significant Figures CalculatorCount significant figures and round a number to a set number of them.
- Graphing CalculatorPlot up to three functions and find roots, intercepts and intersections.
- Scientific CalculatorFull scientific calculator with trig, logs, powers, memory and history.
- Fraction CalculatorAdd, subtract, multiply and divide fractions with simplified answers and working.
- Percentage CalculatorAnswer any percentage question: X% of Y, X is what % of Y, and more.
- Multiplication Table CalculatorThe times table of any whole number, decimal or fraction, up to any row.
- Limit CalculatorFind a limit from either side, with substitution, factorising, L'Hôpital's rule and a table of values.
- Factorial CalculatorFind n! exactly, plus double factorials, for whole numbers.
- Antilog CalculatorFind the antilogarithm (inverse log) in base 10, base e or any base.
- Cubic Equation SolverSolve ax³ + bx² + cx + d = 0 for real and complex roots, with a graph.
- Simplify Radicals CalculatorSimplify square, cube and fourth roots to simplest radical form, like √72 = 6√2.
- Complex Number CalculatorAdd, multiply, divide and raise complex numbers to powers, with polar form.
- Exponential Growth CalculatorSolve exponential growth and decay for the final amount, start, rate or time.
- Long Multiplication CalculatorMultiply, add or subtract with the column method, showing every step.
- Polynomial Division CalculatorDivide polynomials by long or synthetic division to get the quotient and remainder.
- Unit Circle CalculatorFind sin, cos and tan for any angle, with exact values for special angles.
- Linear Interpolation CalculatorFind a value between two known points by linear interpolation.
- Truth Table GeneratorGenerate a truth table for any Boolean logic expression with up to 6 variables.
- Decimal to Fraction CalculatorTurn any decimal, including repeating ones, into a simplified fraction.
- Equivalent Fractions CalculatorFind fractions equal to a given one, or compare two fractions, with bars and a number line.
- Integer CalculatorAdd, subtract, multiply and divide negative numbers, with the sign rules and a number line.
- Place Value CalculatorSee each digit's place value, the expanded form and the number in words.
- Long Division CalculatorDivide numbers with every long division step laid out, including remainders.
- Rounding CalculatorRound numbers to decimal places, significant figures or the nearest ten, hundred and more.
- Square Root CalculatorFind square roots, including simplified radical form for non-perfect squares.
- Exponent CalculatorRaise any number to a power, including negative and fractional exponents.
- Logarithm CalculatorCompute logs in base 10, base e or any base you choose.
- Average CalculatorFind the average of a list of numbers with the sum and count shown.
- Percentage Difference CalculatorCompare two values by the percentage difference relative to their average.
- Ratio CalculatorSimplify ratios, scale them up or down and solve for a missing term.
- Sets and Venn Diagram CalculatorUnion, intersection, difference and complement of sets with a Venn diagram, or counting with n(A ∪ B).
- Binomial Expansion CalculatorExpand (a + b)ⁿ, find any term, the middle term or the term independent of x.
- Quadratic Equation SolverSolve ax² + bx + c = 0 and show real or complex roots with the discriminant.
- Linear Equation SolverType an equation like 2(x − 3) + 4 = 5x/2 and solve it step by step with exact fractions.
- Inequality CalculatorLinear, quadratic, rational and modulus inequalities with a sign chart, a number line and interval notation.
- Slope CalculatorFind a straight line's slope and equation in every form, from two points, a point and slope, or ax + by + c = 0.
- Factoring CalculatorFactorise expressions like 6x² − 7x − 3 or 4a² − 9b² step by step, with every step checked.
- Expand Brackets CalculatorMultiply out brackets like (2a − b)² or 3(x + 2)(2x − 5) with the algebraic identities and an area model.
- Conic Sections CalculatorIdentify a circle, ellipse, parabola or hyperbola and find its foci, eccentricity, directrices and more.
- Trigonometric Equation SolverSolve sin, cos or tan of mx = k: principal value, general solution and solutions from 0° to 360°.
- Heights and Distances CalculatorFind a height, distance or angle of elevation, with exact √3 answers for 30°, 45° and 60°.
- Area CalculatorFind the area of rectangles, circles, triangles, trapezoids and other common shapes.
- Volume CalculatorCalculate the volume of cubes, cylinders, spheres, cones and prisms.
- Circle CalculatorGet a circle's area, circumference, diameter and radius from any one of them.
- Triangle CalculatorSolve any triangle's missing sides and angles plus its area and perimeter.
- Pythagorean Theorem CalculatorFind the missing side of a right triangle using a² + b² = c².
- LCM CalculatorFind the least common multiple of two or more numbers with working.
- GCF CalculatorFind the greatest common factor of a set of numbers.
- Prime Number CheckerCheck whether a number is prime and list primes in a range.
- Prime Factorization CalculatorBreak a number into its prime factors with a factor tree.
- Matrix CalculatorAdd, multiply, invert and find determinants of matrices.
- Differential Equation SolverFirst-order linear, separable, Bernoulli, homogeneous and exact ODEs, with an initial condition and the slope field.
- Eigenvalue and Diagonalisation CalculatorEigenvalues, eigenvectors, diagonalisation, Cayley–Hamilton and quadratic forms, with exact fractions.
- Partial Derivative CalculatorPartial derivatives up to second order, Euler's theorem for homogeneous functions, and Jacobians.
- Maxima, Minima and Lagrange MultipliersMaxima, minima and saddle points of f(x, y), and constrained extremes by Lagrange multipliers.
- Taylor Series CalculatorTaylor and Maclaurin series in one or two variables, with every derivative shown.
- Beta and Gamma Function CalculatorΓ(x) and B(m, n) exactly with √π, and the sin–cos and e^(−axⁿ) integrals they evaluate.
- Double and Triple Integral CalculatorDouble and triple integrals with variable limits, in either order or polar coordinates.
- Laplace Transform CalculatorLaplace and inverse transforms, unit step, delta and convolution, and initial value problems.
- Partial Fraction CalculatorSplit a rational function into partial fractions: repeated, quadratic and improper cases, in exact fractions.
- Second-Order Differential Equation SolverLinear ODEs of any order with constant coefficients, and Cauchy–Euler equations: CF, PI and general solution.
- Gradient, Divergence and Curl CalculatorGradient, directional derivative, divergence, curl and scalar potential of fields in x, y, z.
- Root Finding CalculatorBisection, regula falsi, Newton–Raphson, secant and fixed-point iteration with the iteration table.
- Fourier Series CalculatorFourier series of any function, piecewise too, full or half range, with coefficient formulas and a partial-sum graph.
- Linear Algebra CalculatorLinear independence, Gram–Schmidt, rank and nullity, null space and least squares, with exact fractions.
- Complex Analysis CalculatorCauchy–Riemann equations, harmonic conjugates, residues and contour integrals, and the Möbius map through three points.
- Z-Transform CalculatorZ-transforms and inverse Z-transforms by partial fractions, and difference equations with initial values.
- PDE Solver (Heat, Wave, Laplace)Solve the heat, wave and Laplace equations by separation of variables, with the Fourier coefficients and graphs.
- Divisibility Rules CalculatorTest a number against the divisibility rules for 2 to 12, with the working for each rule.
- Profit and Loss CalculatorProfit or loss and its percentage from CP and SP, SP or CP from a %, and discounts on the marked price.
- Lines and Angles CalculatorComplements, supplements, angles made by a transversal, triangle and polygon angle sums.
- Similar Triangles CalculatorCongruent or similar by SSS, missing sides, Thales' basic proportionality theorem and area ratios.
- Mathematical Induction CalculatorProve a sum formula by induction: base case and the inductive step checked exactly.
- Series Summation CalculatorΣ of a polynomial term, the method of differences, the Vₙ method, AGP and HP, in closed form.
- Mean Value Theorem CalculatorVerify Rolle's, Lagrange's or Cauchy's mean value theorem and find every c.
- Inverse Trigonometric Functions CalculatorPrincipal values of sin⁻¹, cos⁻¹, tan⁻¹ and the rest as exact multiples of π, and tan⁻¹x ± tan⁻¹y.
- Relations CalculatorReflexive, symmetric, transitive, equivalence classes, closures, and one-one or onto functions.
- Volume of Revolution CalculatorVolumes by discs, washers and shells, and surface areas of revolution, as exact multiples of π.
- Fourier Transform CalculatorFourier, sine and cosine transforms of pulses, polynomial pieces and standard functions.
- Symmetry CalculatorLines of symmetry and rotational symmetry of polygons, quadrilaterals, circles and letters.
- Geometric Constructions CalculatorRuler-and-compass steps with a scale drawing: triangles, dividing a segment, tangents.
- Linear Transformation CalculatorMatrix of T relative to bases, change of basis, kernel and range, subspace and span tests.
- Interpolation CalculatorNewton's forward and backward differences, Lagrange's formula and divided differences, with the difference table.
- Numerical Integration CalculatorTrapezoidal rule and Simpson's 1/3 and 3/8 rules from a function or a table, with the error shown.
- Euler and Runge–Kutta CalculatorSolve dy/dx = f(x, y) by Euler, modified Euler, Heun or Runge–Kutta, step by step.
- Gauss–Seidel, Jacobi and LU CalculatorSolve linear systems by Gauss–Seidel or Jacobi iteration, or LU decomposition (Doolittle or Crout).
- Function AnalyserDomain, range, one-one test, even or odd, inverse and composition of functions.
- Curve AnalyserMaxima, minima, increasing and decreasing intervals and points of inflection of a function.
- Number Sequence CalculatorFind any term or the sum of an arithmetic, geometric or Fibonacci sequence.
- Binary CalculatorAdd, subtract, multiply and divide binary numbers and convert them to decimal.
- Bitwise CalculatorDo AND, OR, XOR, NOT and shifts, with two's complement in 8 to 64 bits.
- Mixed Number CalculatorDo arithmetic with mixed numbers and convert to improper fractions.
- Simplify Fractions CalculatorReduce a fraction to its lowest terms and show the common factor used.
- Fraction to Decimal CalculatorConvert a fraction to a decimal and spot repeating digits.
- Cube Root CalculatorCalculate the cube root or any nth root of a number.
- Scientific Notation CalculatorConvert numbers to and from scientific and engineering notation.
- Big Number CalculatorDo exact arithmetic on very large integers and decimals without rounding.
- Percent Error CalculatorMeasure how far an experimental value is from the true value, as a percentage.
- Partnership CalculatorShare a profit between partners by capital and time invested.
- Proportion CalculatorSolve a proportion for the unknown value using cross-multiplication.
- System of Equations SolverSolve two or three simultaneous linear equations with working.
- Distance Formula CalculatorFind the distance between two points on a coordinate plane.
- Midpoint CalculatorFind the midpoint between two coordinate points.
- 3D Lines and Planes CalculatorLines and planes in 3D: angle and shortest distance between lines, plane through three points.
- Triangle Centres CalculatorArea, centroid, circumcentre, orthocentre and incentre of a triangle from its vertices.
- Surface Area CalculatorFind the total surface area of common 3D solids.
- Perimeter CalculatorCalculate the perimeter of common 2D shapes.
- Arc Length CalculatorFind the arc length and sector area from radius and angle.
- Right Triangle CalculatorSolve a right triangle from two known values, including angles.
- Regular Polygon CalculatorFind side length, area and angles of a regular polygon.
- Trigonometry CalculatorEvaluate sine, cosine, tangent and their inverses in degrees or radians.
- Law of Sines CalculatorSolve oblique triangles with the law of sines.
- Law of Cosines CalculatorSolve triangles from two sides and an angle or all three sides.
- Factor CalculatorList every factor and factor pair of a whole number.
- Modulo CalculatorFind the remainder when one number is divided by another.
- Linear Programming CalculatorMaximise or minimise Z = px + qy by the corner-point method, including unbounded regions.
- Markov Chain Calculatorn-step transition probabilities and the stationary distribution of a Markov chain, exactly.
- Recurrence Relation SolverClosed forms for linear recurrences like Fibonacci, from the characteristic equation, checked against the recurrence.
- Graph Theory CalculatorDegrees, connectivity, Euler paths, bipartiteness and the number of spanning trees of a graph.
- Circle Tangent and Secant CalculatorTangent length from a point, angle between tangents, tangent–secant and intersecting chords.
- Multinomial Theorem CalculatorThe coefficient of any term in (a₁x₁ + … + aₘxₘ)ⁿ, the number of terms and the sum of coefficients.
- Tangent and Normal to a Conic CalculatorTangent and normal at a point, chord of contact, pair of tangents and chord with a midpoint.
- Leibniz Integral Rule CalculatorDifferentiate under the integral sign with variable limits, checked against the slope of F(t).
- Multivariable Chain Rule CalculatorTotal derivative dz/dt, or ∂z/∂u and ∂z/∂v, for z = f(x, y), each checked.
- System of Differential Equations CalculatorSolve dx/dt = ax + by, dy/dt = cx + dy by elimination, with initial conditions.
- Linear PDE CalculatorHomogeneous linear PDEs with constant coefficients: auxiliary equation, CF and PI.
- Picard and Taylor Series Method CalculatorPicard's successive approximations and Taylor's series method for dy/dx = f(x, y).
- Lagrange Linear PDE CalculatorSolve Pp + Qq = R from dx/P = dy/Q = dz/R, with the general solution φ(u, v) = 0.
- PDE Formation CalculatorForm a PDE by eliminating arbitrary constants or arbitrary functions, checked by substitution.
- Charpit's Method CalculatorNon-linear first-order PDEs: Charpit's equations and complete integrals of the standard forms.
- Complex Numbers Locus CalculatorLoci like |z − a| = k|z − b| and arg((z − a)/(z − b)) = θ, and rotation in the complex plane.
- Derivative CalculatorDifferentiate a function and see each rule applied.
- Integral CalculatorEvaluate definite and indefinite integrals with working.
- Vector CalculatorAdd vectors and compute dot products, cross products and magnitudes.
- Hex CalculatorDo arithmetic on hexadecimal numbers and convert them to decimal.
- Common Factor CalculatorList every factor two or more numbers share.
Education
- GPA CalculatorCalculate semester and cumulative GPA from grades and credit hours.
- CGPA CalculatorCombine semester GPAs or SGPAs into a cumulative grade point average.
- CGPA to Percentage CalculatorConvert a CGPA into a percentage using common university formulas.
- Grade CalculatorWork out your current course grade from weighted assignments and exams.
- Chronological Age CalculatorFind exact age in years, months and days on a test date, as used in assessments.
- IELTS Band Score CalculatorWork out the overall IELTS band from your four section scores.
- UCAS Points CalculatorAdd up UCAS Tariff points for A-levels, BTECs, Highers and IB.
- IB Points CalculatorAdd up IB Diploma points and check the pass conditions.
- WAM CalculatorCalculate your weighted average mark from marks and credit points.
- GWA CalculatorCompute your General Weighted Average from grades and units.
- Graduation Year CalculatorFind what year a child starts school and graduates from their birth date.
- SGPA CalculatorFind your semester grade point average from subject grades and credits.
- Final Grade CalculatorFind the score you need on the final exam to reach your target grade.
- Test Score CalculatorTurn correct answers out of total into a percentage and letter grade.
- Marks Percentage CalculatorConvert obtained marks across subjects into an overall percentage.
- Attendance Percentage CalculatorCheck your attendance percentage and how many classes you can skip or must attend.
- Percentage to GPA CalculatorConvert percentage marks into a 4.0-scale GPA for applications abroad.
- High School GPA CalculatorCalculate weighted and unweighted high school GPA with honors and AP classes.
- Degree Classification CalculatorEstimate your UK degree class from module marks and year weightings.
- Grade Curve CalculatorApply a curve to class scores and see adjusted grades.
- SAT Score CalculatorAdd your Reading and Writing and Math scores to get your SAT total out of 1600.
- ACT Score CalculatorWork out your ACT Composite from English, Math and Reading under the 2025 rules.
- Words to Pages CalculatorEstimate how many pages a word count fills for a given font and spacing.
- Reading Time CalculatorEstimate how long it takes to read or speak a text at your pace.
Date & Time
Unit Converters
- PPM ConverterConvert ppm, ppb, percent and mg/L, and ppm to mg/m³ for gases.
- Number Base ConverterConvert between binary, octal, decimal and hexadecimal.
- Roman Numeral ConverterConvert numbers to Roman numerals and back.
- Energy ConverterConvert joules, calories, kilowatt-hours and BTU.
- Angle ConverterConvert degrees, radians and gradians.
Business
Statistics & Probability
- Statistics CalculatorPaste a list of numbers to get count, sum, mean, median, spread and more at once.
- Bayes' Theorem CalculatorUpdate a probability with new evidence, such as the chance a positive test is right.
- Critical Value CalculatorFind z, t, chi-square and F critical values for any significance level.
- Standard Error CalculatorCalculate the standard error of a mean or proportion with a confidence interval.
- ANOVA CalculatorRun a one-way ANOVA across groups, or a one-sample z-test.
- Empirical Rule CalculatorApply the 68–95–99.7 rule to find where values in a normal distribution fall.
- Grouped Data CalculatorMean, median, mode and SD of grouped data by the direct, assumed-mean or step-deviation method.
- Mean, Median, Mode CalculatorFind the mean, median, mode and range of a data set.
- Pie Chart and Bar Graph CalculatorTurn data into a pie chart and bar graph (or double bar graph), with each central angle worked out.
- Pictograph and Tally Marks CalculatorFrequency table with tally marks and a pictograph with a key, from counts or raw data.
- Standard Deviation CalculatorCalculate sample or population standard deviation with every step shown.
- Weighted Average CalculatorAverage values that carry different weights.
- Probability CalculatorWork out probabilities of single, combined and conditional events.
- Permutation & Combination CalculatorCount arrangements and selections with nPr and nCr.
- Exponential and Uniform Distribution CalculatorProbabilities, mean and variance for the exponential and uniform distributions, with the area shaded.
- Z-Score CalculatorConvert a raw score to a z-score and find its percentile.
- Confidence Interval CalculatorBuild a confidence interval for a mean or proportion.
- Sample Size CalculatorFind how many responses a survey or study needs for a given margin of error.
- Variance CalculatorMeasure how spread out a data set is with sample or population variance.
- Geometric Mean CalculatorFind the geometric mean of a set of positive numbers or growth rates.
- Quartile & IQR CalculatorFind quartiles, the interquartile range and a five-number summary.
- Percentile CalculatorFind the value at a given percentile or the percentile rank of a value.
- Coefficient of Variation CalculatorCompare relative spread between data sets with the coefficient of variation.
- Expected Value CalculatorFind the expected value of outcomes with their probabilities.
- Normal Distribution CalculatorFind probabilities and areas under the normal curve.
- Binomial Distribution CalculatorCalculate exact and cumulative binomial probabilities.
- Poisson Distribution CalculatorFind the probability of a number of events in a fixed interval.
- Margin of Error CalculatorCalculate the margin of error of a survey result.
- P-Value CalculatorGet a p-value from a z, t, chi-square or F statistic.
- T-Test CalculatorRun one-sample, paired or two-sample t-tests.
- Control Chart Calculator (X̄ and R)X̄ and R control charts from subgroup data: centre lines, control limits and out-of-control points.
- Chi-Square Test CalculatorTest independence or goodness of fit with a chi-square test.
- Linear Regression CalculatorFit a least-squares line to paired data and predict new values.
- Correlation Coefficient CalculatorMeasure the strength of a linear relationship with Pearson's r.
Science
- Chemical Equation BalancerBalance chemical equations automatically with the smallest whole-number coefficients.
- Work & Power CalculatorFind work, power, force, distance or time with W = F·d and P = W/t.
- SUVAT CalculatorSolve constant-acceleration problems from any three of s, u, v, a and t.
- Hooke's Law CalculatorFind spring force, spring constant or extension, plus the energy stored.
- Friction & Inclined Plane CalculatorWork out friction and whether an object slides on a flat surface or a slope.
- Gas Laws CalculatorSolve Boyle's, Charles's, Gay-Lussac's and the combined gas law.
- Specific Heat CalculatorCalculate heat energy with Q = mcΔT, plus heating time for a given power.
- Boiling Point at AltitudeFind the temperature water boils at for your elevation.
- Electron Configuration CalculatorFind the electron configuration of any element, including the exceptions.
- Empirical Formula CalculatorFind empirical and molecular formulas from mass percentages, or % composition.
- Speed, Distance & Time CalculatorSolve for speed, distance or time when you know the other two.
- Molecular Weight CalculatorFind the molecular weight of a chemical formula from its atoms.
- Velocity CalculatorFind velocity from displacement and time, or from acceleration.
- Acceleration CalculatorCalculate acceleration from change in velocity over time.
- Force CalculatorApply Newton's second law to find force, mass or acceleration.
- Kinetic Energy CalculatorFind kinetic energy from mass and velocity.
- Potential Energy CalculatorCalculate gravitational potential energy from mass and height.
- Momentum CalculatorCalculate momentum from mass and velocity.
- Projectile Motion CalculatorFind range, height and flight time of a projectile.
- Free Fall CalculatorCalculate fall time and impact speed from a height.
- Density CalculatorFind density, mass or volume from the other two.
- Wavelength & Frequency CalculatorConvert between wavelength, frequency and wave speed.
- Molar Mass CalculatorCalculate the molar mass of a chemical formula.
- Molarity CalculatorFind solution molarity, moles or volume.
- Dilution CalculatorSolve C1V1 = C2V2 for any missing value.
- Grams to Moles CalculatorConvert between grams, moles and number of particles.
- pH CalculatorCalculate pH, pOH and ion concentrations of a solution.
- Ideal Gas Law CalculatorSolve PV = nRT for pressure, volume, moles or temperature.
- Percent Yield CalculatorCompare actual and theoretical yield of a reaction.
- Half-Life CalculatorFind remaining quantity, elapsed time or half-life of a decaying substance.
- Weight on Other Planets CalculatorSee what you would weigh on the Moon, Mars and other planets.
- Light-Year Distance CalculatorConvert light-years, parsecs, astronomical units and kilometres.
- Punnett Square CalculatorPredict offspring genotype and phenotype ratios from parent alleles.
- Baby Eye Color PredictorEstimate the chances of a baby's eye colour from the parents' eyes.
- Blood Type CalculatorFind which blood types a child could inherit from two parents.
Engineering
- Ohm's Law CalculatorSolve for voltage, current, resistance or power from any two known values.
- Resistor Color Code CalculatorDecode 4, 5 and 6-band resistor colours into resistance and tolerance.
- Series & Parallel Resistor CalculatorFind total resistance of resistors in series or parallel.
- Torque CalculatorCalculate torque from force and lever arm, or from power and RPM.
Land & Farming
Sports & Hobbies
Text & Writing
- Word CounterCount words, characters, sentences and paragraphs, with reading and speaking time.
- Typing Speed TestTake a timed typing test and get words per minute and accuracy.
- Case ConverterChange text to UPPER, lower, Title, Sentence, camelCase or snake_case.
- Text to Binary ConverterConvert text to binary, hex, decimal (ASCII) or Base64 and decode it back.
- Morse Code TranslatorTranslate text to Morse code and Morse code back to text.