Significant Figures Calculator

Count significant figures and optionally round a number to a chosen precision.

Precision Studio

Count significant figures and (optionally) round your number.

Digits:

Number

Supports scientific notation (e.g. 1.23e-4).

Round to (sig figs)

Optional. Range: 1–20

Significant figures

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Rounded

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Target

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Note: Trailing zeros rules may vary by context.

Result—

Example: 0.004560 has 4 significant figures

Formula

Count significant digits • Round using N significant digits (toPrecision)