Calculators for health and fitness
BMI, calories, macros, pace and heart rate.
Health
- Blood Sugar ConverterConvert blood glucose between mg/dL and mmol/L and see where it falls.
- BMI CalculatorCheck your body mass index from height and weight and see which range you fall in.
- Body Fat CalculatorEstimate body fat percentage from simple tape measurements.
- Ideal Weight CalculatorCompare healthy weight targets for your height using several well-known formulas.
- BMR CalculatorEstimate the calories your body burns at complete rest each day.
- TDEE CalculatorEstimate total daily energy expenditure from your BMR and activity level.
- Calorie CalculatorFind how many calories a day you need to maintain, lose or gain weight.
- Macro CalculatorSplit daily calories into protein, carbs and fat grams for your goal and diet style.
- Period CalculatorPredict your next periods and cycle dates from your last period and cycle length.
- Ovulation CalculatorFind your likely ovulation day and fertile window for the coming cycles.
- Sleep CalculatorFind the best times to sleep or wake up so you finish a full sleep cycle.
- Cholesterol Units ConverterConvert cholesterol and triglycerides between mg/dL and mmol/L.
- LDL CalculatorEstimate LDL with the Friedewald and NIH equations.
- Weight Loss Percentage CalculatorWork out the percentage of body weight you've lost.
- Relative Fat Mass CalculatorEstimate body fat from height and waist with the RFM formula.
- Body Roundness Index CalculatorCalculate your Body Roundness Index from height and waist.
- Lean Body Mass CalculatorEstimate how much of your weight is muscle, bone and organs rather than fat.
- Waist-to-Hip Ratio CalculatorMeasure your waist-to-hip ratio as an indicator of health risk from body fat distribution.
- Calorie Deficit CalculatorSet a safe calorie deficit and see when you could reach your goal weight.
- Weight Loss CalculatorPlan a weight loss timeline from your target weight, date and daily intake.
- Protein Intake CalculatorFind how many grams of protein you need daily based on weight and activity.
- Water Intake CalculatorEstimate daily water needs from body weight, activity and climate.
- Heart Rate Zone CalculatorFind your five training heart rate zones from age and resting pulse.
- Healthy Weight CalculatorSee the weight range that counts as healthy for your height.
- Target Heart Rate CalculatorFind the heart rate range to aim for during moderate and vigorous exercise.
- Drug Half-Life CalculatorSee how much of a substance remains over time from its half-life.
- Waist-to-Height Ratio CalculatorCheck whether your waist is less than half your height, a simple heart-health marker.
- Body Surface Area CalculatorEstimate body surface area, often used for medication dosing, from height and weight.
- Body Shape CalculatorIdentify your body shape from bust, waist and hip measurements.
- Weight Gain CalculatorFind the calorie surplus needed to gain weight or muscle at a steady pace.
- Carbohydrate CalculatorEstimate a daily carbohydrate target for your energy needs and diet type.
- Fat Intake CalculatorFind a healthy daily range of dietary fat in grams.
- Fiber Intake CalculatorEstimate how much dietary fibre you should eat each day.
- Keto Macro CalculatorSet ketogenic diet macros with a low net-carb limit.
- Intermittent Fasting CalculatorPlan your eating and fasting windows for 16:8, 18:6 or other schedules.
- Maximum Heart Rate CalculatorEstimate your maximum heart rate using several age-based formulas.
- Blood Pressure Category CheckerClassify a blood pressure reading into normal, elevated or hypertension stages.
- Mean Arterial Pressure CalculatorCalculate mean arterial pressure from systolic and diastolic readings.
- Cholesterol Ratio CalculatorFind your total-to-HDL cholesterol ratio and what it suggests about heart risk.
- A1C CalculatorConvert HbA1c to estimated average glucose and back.
- Safe Period CalculatorEstimate lower-fertility days in your cycle (not a reliable form of contraception).
- eGFR CalculatorEstimate kidney function as eGFR from serum creatinine, age and sex.
- Creatinine Clearance CalculatorEstimate creatinine clearance with the Cockcroft-Gault equation.
- Medication Dosage CalculatorWork out a weight-based medication dose and liquid volume to give.
- IV Flow Rate CalculatorCalculate IV drip rate in drops per minute or mL per hour.
- Pack Year CalculatorMeasure lifetime smoking exposure in pack-years.
- Sleep Debt CalculatorTotal how much sleep you are short this week compared with your need.
- Caffeine CalculatorSee how much caffeine is still in your system by bedtime.
- Army Body Fat CalculatorEstimate body fat with the tape method used for military fitness standards.
Fitness
- Running Split CalculatorGet even or negative splits per kilometre or mile for a goal time.
- Running Training Pace CalculatorGet easy, threshold, interval and marathon paces from a race time (VDOT).
- Calories Burned by Heart RateEstimate calories burned from average heart rate, age and weight.
- 1RM Percentage & 5/3/1 CalculatorTurn your one-rep max into working weights or a 5/3/1 cycle.
- Pace CalculatorConvert between running pace, speed, distance and finish time.
- One Rep Max CalculatorEstimate your one-rep max from a set and get training weights by percentage.
- Calories Burned CalculatorEstimate calories burned in hundreds of activities by duration and body weight.
- Race Time PredictorPredict finish times for other race distances from a recent result.
- Marathon Pace CalculatorGet the per-kilometre or per-mile splits needed to hit a marathon target time.
- Steps to Distance CalculatorConvert step counts into kilometres or miles using your stride length.
- VO2 Max CalculatorEstimate aerobic fitness as VO2 max from a field test or resting heart rate.
- Cycling Power CalculatorEstimate watts needed to ride at a speed given weight, gradient and wind.
- Swim Pace CalculatorConvert swim times into pace per 100 metres or yards.
- Wilks Score CalculatorCompare powerlifting totals across bodyweights with Wilks and DOTS scores.
- Barbell Plate CalculatorSee which plates to load on each side of the bar to hit a target weight.
- FFMI CalculatorCalculate fat-free mass index to gauge muscularity relative to height.
- Walking Calorie CalculatorEstimate calories burned walking from distance, pace and incline.
- Running Calorie CalculatorEstimate calories burned on a run from distance, weight and pace.
- Steps to Calories CalculatorTurn your daily step count into estimated calories burned.