Rounding Calculator – Round to Decimal Places or Nearest 10, 100

Halfway values round away from zero, so −2.5 becomes −3 and 2.5 becomes 3. This is the rule most schools teach.

Computers store most decimals as approximations. This calculator works on the digits you type, so it always follows the written rule.

Rounding Calculator

Enter a number and choose where to round. The calculator shows which digit decides and why it rounds up or stays the same.

Number

Round to

Rounded

3.14

2 decimal places (hundredths)

Step-by-step solution

Worked out with your numbers. Change any value above and the steps update.

Find the digit in the place you are rounding to.
Look at the next digit to its right: 5 or more rounds up, 4 or less leaves the digit as it is.
Drop every digit after the rounding place (or replace them with zeros for tens, hundreds and thousands).
Numbers are rounded exactly as typed, so 1.005 correctly becomes 1.01, unlike some calculators.

How are negative numbers rounded?

Halfway values round away from zero, so −2.5 becomes −3 and 2.5 becomes 3. This is the rule most schools teach.

Why do some calculators round 1.005 to 1.00?

Computers store most decimals as approximations. This calculator works on the digits you type, so it always follows the written rule.

Results are estimates for general information and are not financial, medical or professional advice.