Round Number Calculator

Q: What is half-up rounding?

The standard method: if the next digit is 5 or more, round up; otherwise round down.

Q: What is half-even (banker's) rounding?

When the digit is exactly 5, round to the nearest even digit. Reduces bias in statistical calculations.

Q: What is truncation?

Simply discards extra decimal digits without any rounding.

Use our free round number calculator to round any number to a specified number of decimal places. Supports 6 rounding methods: half-up (standard), half-down, half-even (banker's rounding), ceiling, floor, and truncate, with a full comparison of all methods.

Math

Number

Decimal Places

Rounding Method

Formula

Round any number to any number of decimal places using 6 different rounding methods. Compares all methods side-by-side for the same input.

Round using chosen method to specified decimal places

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the number you want to round.
2Choose the number of decimal places (0-15).
3Select a rounding method.
4Click Calculate.

Examples

3.14159 to 2 decimal places (half-up)

1.3.14159 → third decimal is 1 (< 5) → 3.14

Result: 3.14

2.675 to 2 decimal places (half-even)

1.2.675 → exactly 2.68 (even last digit)

Result: 2.68

Frequently Asked Questions

The standard method: if the next digit is 5 or more, round up; otherwise round down.

When the digit is exactly 5, round to the nearest even digit. Reduces bias in statistical calculations.

Simply discards extra decimal digits without any rounding.

0 to 15 decimal places.

Related Calculators

Ceiling Calculator Floor Calculator Truncate Calculator Significant Figures Calculator Precision Calculator Percentage Calculator

CalculateMe Team

Last updated: 2026-07-15

Round Number Calculator

Formula

How It Works

Examples

3.14159 to 2 decimal places (half-up)

2.675 to 2 decimal places (half-even)

Frequently Asked Questions

What is half-up rounding?

What is half-even (banker's) rounding?

What is truncation?

How many decimal places can I use?

Related Calculators

Round Number Calculator

Formula

How It Works

Examples

3.14159 to 2 decimal places (half-up)

2.675 to 2 decimal places (half-even)

Frequently Asked Questions

What is half-up rounding?

What is half-even (banker's) rounding?

What is truncation?

How many decimal places can I use?

Related Calculators