Round any number your way. This free rounding calculator rounds to decimal places or the nearest 10/100/1,000, with standard, banker’s, ceiling, floor and truncate methods
Round a number
Choose how precise you want the result and which rounding method to use. “Round half up” is the everyday default; “banker’s rounding” rounds halves to the nearest even digit.
Rounded
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Enter a number
Original
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Difference
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Rounded down
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Rounded up
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Rounding replaces a number with a simpler nearby value at the chosen precision. The method matters only when the digit is exactly halfway (a 5).
Use this free rounding calculator to round a number to any decimal place or to the nearest 10, 100 or 1,000. Choose your rounding method, including standard and banker’s rounding.
What this rounding calculator does
A rounding calculator replaces a number with a simpler nearby value at the precision you choose. It rounds to decimal places or to the nearest 10/100/1,000, using the method you pick.
How rounding works
Look at the digit just past your cut-off:
• 5 or more → round up
• less than 5 → round down (stay)
So 3.14159 to 2 decimal places is 3.14, and 1,234 to the nearest 100 is 1,200.
Rounding methods explained
Method
What it does
Round half up
The everyday rule — a halfway digit rounds up.
Round half to even (banker’s)
Halves round to the nearest even digit, reducing bias.
Ceiling
Always rounds up.
Floor
Always rounds down.
Truncate
Cuts off extra digits toward zero.
What is banker’s rounding?
Banker’s rounding (round half to even) sends exact halves to the nearest even number — so 2.5 becomes 2 and 3.5 becomes 4. Over many values this avoids the slight upward bias of always rounding halves up, which is why it’s common in finance and statistics.
How to use the rounding calculator
Enter your number.
Choose the precision (decimal places or nearest 10/100/1,000).
Pick a rounding method and read the result.
Rounding FAQ
How do I round a number?
Look at the digit just past where you're cutting off: if it's 5 or more, round up; if less, round down. So 3.14159 to two decimal places is 3.14.
How do I round to the nearest 10 or 100?
Choose "nearest 10" or "nearest 100" — the calculator rounds the number to that place. 1,234 to the nearest 100 is 1,200.
What is banker's rounding?
Round half to even: exact halves go to the nearest even digit, so 2.5 becomes 2 and 3.5 becomes 4. It reduces the upward bias of always rounding halves up.
What's the difference between rounding and truncating?
Rounding picks the nearest value; truncating simply cuts off the extra digits toward zero. Truncating 2.99 to a whole number gives 2, while rounding gives 3.
How do I round to significant figures instead?
That's a slightly different idea — use our significant figures calculator, which rounds based on the number of meaningful digits rather than decimal places.
Is the rounding calculator free?
Yes, this rounding calculator is completely free, needs no sign-up, and gives instant results in your browser.
