Decimal Calculator

Add, subtract, multiply or divide decimals and see each step, or convert a decimal into a fraction and a percentage.

What do you want to do?

Operation

First decimal

Second decimal

A decimal point separates whole numbers from parts of a whole.

How do I add or subtract decimals?

Line up the decimal points (add zeros so both have the same number of decimal places), then add or subtract as you would with whole numbers.

How do I multiply decimals?

Ignore the points and multiply the digits, then count the total decimal places in both numbers and put the point that many places from the right.

Want the method explained?

Read the step-by-step guide to decimals for worked examples of every operation.

Made by Kiwiland Education

Turn decimal practice into a case to crack with no-prep Math Mysteries — printable & digital, self-checking. Great for grades 4–6.