About AllCalcHub
AllCalcHub (allcalchub.com) puts the calculators people use every day in one place, from a quick sum to a home loan, a BMI check or an exam grade. It is free, works on any device, and needs no account.
What you can do here
- Quick sums. The calculator on the homepage handles everyday arithmetic and scientific functions such as sin, log, powers and roots.
- Topic calculators. 945 calculators across 26 topics, including money, health, maths, dates, unit conversions, school grades, home projects and business. 945 are ready now and more are added regularly.
- Search in plain words. Type what you need, such as “home loan”, “kg to lbs” or “due date”, and the search finds the right tool, even with a typo.
How it works
- Find a calculator from the homepage, the search box or the list of all calculators.
- Enter your numbers. Answers update as you type, with charts or tables where they help.
- Open “How this was worked out” to see the formula with your own numbers.
- Copy the answer, or print the inputs, answer and charts.
Calculations run in your browser. Your numbers are not sent to our servers, which is why results appear instantly and work even on a slow connection.
How we keep answers accurate
- Exact decimal maths. Numbers are worked out in decimal, the way you would on paper, so you never see answers like 0.30000000000000004.
- Tested formulas. Every calculator is checked against known correct answers before it is published, including awkward cases like leap years, zero interest and very large numbers.
- Official sources. Health and money pages link to the official guidance they follow, such as the World Health Organization or a central bank.
- Clear limits. Each calculator explains what it does not cover. Results are estimates to help you plan; for decisions about your health, money or legal matters, talk to a qualified professional.
Made for everyone
The site is designed for all ages and abilities, from school pupils to grandparents: large, clear keys, readable text, full keyboard support, screen reader labels, and a dark theme. It picks a currency, number format and units to suit your region automatically, and works the same on phones, tablets and computers.
An important note on results
Every calculator gives estimates for general information and learning. Results are not financial, tax, medical, legal or other professional advice, and rules such as tax rates and loan terms differ between countries and change over time. Please check important figures yourself and ask a qualified professional before making decisions. Our Terms of Use explain this in full.
How the site is funded
AllCalcHub is free to use and is supported by advertising. Ads are always labelled and kept away from the calculator keys. Read our Privacy Policy to see how ads and cookies work.
Contact
Found a mistake, want a calculator we don’t have yet, or have a business enquiry? Email allcalchub@gmail.com or see the contact page for what to include. We read every message.