Rounding Calculator

Use this free rounding calculator to round numbers to decimal places, significant figures, or place values with nearest, up, down, and truncate methods.

All tools
Decimal places Significant figures Place value Multiple methods
Decimal places: 12.3456 to 2 decimal places12.35
Method
Nearest
Precision
2 decimal places
Difference
0.0044

Steps

  1. Start with 12.3456.
  2. Use decimal places mode with 2 decimal places.
  3. Apply nearest rounding.
  4. The rounded value is 12.35.

How to use the rounding calculator

  1. Choose decimal places, significant figures, or place value mode.
  2. Choose nearest, round up, round down, or truncate.
  3. Enter the number and precision, then press Round value.
  4. Review the rounded answer, difference, steps, examples, and recent answers.

Common uses

Round money, measurements, and everyday decimal values.

Round study answers to a required number of significant figures.

Round whole numbers to tens, hundreds, thousands, or decimal places.

Compare nearest, round up, round down, and truncate methods.

Examples

Decimal places 12.3456 to 2 decimal places

12.35

Significant figures 98,765 to 3 significant figures

98,800

Place value 1,846 to the nearest hundred

1,800

Frequently asked questions

Quick answers about decimal places, significant figures, place values, rounding methods, and privacy.

What rounding modes are supported?

The calculator supports decimal places, significant figures, and place value rounding.

How do I round to a place value?

Use place-value mode. Exponent 1 means nearest 10, exponent 2 means nearest 100, exponent 3 means nearest 1,000, and exponent -2 means nearest 0.01.

What is the difference between nearest, up, down, and truncate?

Nearest rounds to the closest value. Up uses the next higher rounding value, down uses the next lower rounding value, and truncate drops extra digits toward zero.

Can I round negative numbers?

Yes. The calculator accepts negative numbers. For nearest rounding, half values move away from zero.

Why can rounded decimals sometimes look surprising?

Browsers store many decimals in binary floating-point form. The calculator cleans display values, but very precise decimal work can still have normal floating-point limits.

Is my rounding history private?

Yes. Recent rounded values stay only in the current browser tab while you use the page. They are not sent to a server.

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