Free online calculators
Fast, simple tools for money, health and math. No sign-up, no clutter.
A little less mental math.
Your keyboard works here 15-digit precision. Zero distractions.
- 0–9digits
- +-*/operators
- Enterequals
- Backspacedelete
- Escclear
- ( )%!^also work
- Pinserts π
Popular calculators
Financial Calculators
OpenMortgage payment calculator with taxes, insurance, PMI and extra payments.
Payment and total interest of any loan, a deferred payment loan or a bond, with a full schedule.
Loan amortization calculator with extra payments and a month-by-month schedule.
See how your savings grow with regular deposits.
Fitness and Health Calculators
OpenMath Calculators
OpenEveryday Calculators
OpenA free online calculator with history
UseCalculator.net is a free online calculator and a growing collection of calculators for money, health and math. Use it as a basic calculator for sums, percentages and discounts, or switch to scientific mode for trigonometry, logarithms, powers and roots. It keeps your last 10 results, works with your keyboard and needs no sign-up.
For bigger questions, pick a specialized tool: financial calculators for mortgages, loans, retirement and taxes, fitness and health calculators for BMI, calories and pregnancy, math calculators for percentages and scientific functions, and everyday calculators for tips and splitting a bill.
The most used tools are the mortgage calculator with taxes, insurance and PMI, the BMI calculator for adults and children, the calorie calculator and the percentage calculator.
Frequently asked questions
Is this online calculator free?
Yes. The calculator and every tool on the site are free to use, with no sign-up and no limit on how many calculations you do.
Does the calculator save my history?
Yes. Your last 10 calculations are saved in your browser on this device, so they are still there when you come back. They are never sent to our servers, and you can clear them at any time in the history panel.
Can I use my keyboard?
Yes. Type digits and the operators + - * /, press Enter for equals, Backspace to delete the last character and Esc to clear. Brackets, %, ! and ^ also work, and P inserts pi.
How do I calculate a percentage?
Type the percent after the number: 13% × 48 gives 13% of 48, and 300 × (1 − 20%) gives the price after a 20% discount. For percent change between two numbers, use the Percentage Calculator.
Is there a scientific calculator?
Yes. Switch the calculator to Scientific for sin, cos, tan, logarithms, powers, roots, factorials, pi and e, in degrees or radians. A full-page version is available as the Scientific Calculator.