Rounding Calculator
Round a number to any decimal place — to the nearest, up or down.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
3.14
Rounded 3.14Show steps
- Factor = 10^2 = 100.
- Scale up: 3.14159 × 100 = 314.159.
- Round to the nearest whole number: 314.159 → 314.
- Scale back: 314 ÷ 100 = 3.14, rounded to 2 decimal places.
How to use the rounding calculator
- 1Pick a rounding mode — Nearest, Up or Down.
- 2Enter the number and how many decimal places you want.
- 3Read the rounded result and open Show steps for the working.
Nearest, up or down
Nearest rounds to the closest value, breaking ties upward — the everyday kind of rounding. Up (ceiling) always pushes higher and Down (floor) always pulls lower — handy when you must never exceed or never fall short of a limit.
Frequently asked questions
How does rounding to the nearest work?
The number is scaled by 10 to the power of the chosen decimal places, then round-half-up is applied and it is scaled back. So 3.14159 to 2 places gives 3.14, and 2.345 to 2 places gives 2.35.
What is the difference between up and down?
Up always rounds toward the larger value (ceiling), so 2.341 to 2 places becomes 2.35. Down always rounds toward the smaller value (floor), so 2.349 to 2 places becomes 2.34 — regardless of the digit that follows.
Why does the result keep trailing zeros?
The answer is shown to exactly the number of decimal places you asked for, so 2.5 rounded to 2 places reads 2.50. This makes the precision explicit. Copy gives the plain numeric value.