Education

Significant Figures Calculator

Count significant figures and round numbers to a chosen number of them.

Education

Local only

Numbers

Round to (0 = don't round)

Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

How it works

Leading zeros never count; trailing zeros count after a decimal point; trailing zeros in whole numbers without a point are flagged as ambiguous.

Good to know

How do I use it?

Enter your numbers, adjust the options and press “Count”. Check the result, then copy or download it.

How does it work?

Leading zeros never count; trailing zeros count after a decimal point; trailing zeros in whole numbers without a point are flagged as ambiguous.

Is my data uploaded?

No. Everything is processed in your browser and nothing is sent to a server. No account is needed.