Core calculators
The everyday essentials: percentages and percentage change, fractions, unit conversion, area, volume, the Pythagorean theorem, compound interest, loan payments and splitting a tip.
Percentage calculator
Find a percentage of a value or compare one value with another.
Percentage change calculator
Calculate the percentage change from an old value to a new value, with the baseline made explicit.
Fraction calculator
Add, subtract, multiply, divide, or reduce fractions using exact rational arithmetic.
Area calculator
Area of a rectangle, triangle or circle in square metres.
Volume calculator
Volume of a box, cylinder or sphere in cubic metres.
Pythagorean theorem calculator
Find the missing side of a right triangle from the other two.
Unit conversion calculator
Convert supported length, mass, temperature, area, volume, and time units; currency conversion is not included.
Compound interest calculator
See how a one-time deposit grows with compound interest over the years.
Loan payment calculator
Find the monthly payment on a fixed-rate loan and how much of it goes to interest.
Tip splitting calculator
Add a tip to the bill and see what each person pays, to the cent.