Rounding Calculator
Type a number and choose how to round it. The calculator rounds the digits exactly as you typed them, so 1.005 to 2 places is 1.01.
- Nothing you type is stored
- Free
- No signup
Rounded
3.14
- Original
- 3.14159
- Changed by
- −0.00159
Show working
- 3.14 | 159
- → 3.14
How to use
- Type the number.
- Choose decimals, significant figures or nearest, and how many places (or ten, hundred, lakh…).
- Read the rounded number and how much it changed. Change the rounding rule under More options if needed.
Good to know
School rule (half up): look at the first digit you drop. If it is 5 or more, round up; if it is less than 5, keep the digit. 3.14159 to 2 decimal places: the next digit is 1, so 3.14. Negative numbers round the same way away from zero: −2.5 to a whole number is −3.
Significant figures count from the first non-zero digit: 0.012345 to 3 s.f. is 0.0123, and 1,23,456 to 3 s.f. is 1,23,000. Banker's rounding (half to even) sends an exact half to the nearest even digit (2.345 → 2.34, 2.355 → 2.36), which avoids a bias when many values are added. Always up and always down are the ceiling and floor.
Many calculators and spreadsheets store decimals in binary, so 1.005 is really 1.00499999… and rounds to 1.00. This calculator works on the decimal digits you typed, so it gives the textbook answer. Rounding to the nearest ₹10 is common in Indian tax: the Income-tax Act (Section 288A) rounds total income to the nearest multiple of ₹10.
Questions
How do I round to 2 decimal places?
Look at the third decimal digit. If it is 5 or more, add 1 to the second; otherwise leave it. 7.846 → 7.85, 7.843 → 7.84.
What is 1,46,789 rounded to the nearest lakh?
1,00,000, because the ten-thousands digit is 4 (less than 5). 1,56,789 would round to 2,00,000.
What are significant figures?
The digits that carry meaning, starting from the first non-zero digit. 0.00450 has 3 significant figures (4, 5 and the final 0).
Why does my spreadsheet round 2.675 to 2.67?
Binary storage makes 2.675 slightly less than 2.675. This calculator rounds the written number, so you get 2.68 with the half-up rule.
What is banker's rounding?
When a number is exactly halfway, it rounds to the nearest even digit: 0.5 → 0, 1.5 → 2, 2.5 → 2. It is used in some accounting and computing systems.