Significant Figures Calculator
Round a number to a chosen number of significant figures.
Result
Results are estimates for general information only and are not professional advice.
Significant figures
Significant figures show the precision of a measurement. This calculator rounds any number to the number of significant figures you choose, correctly handling leading zeros and rounding rules — essential for science and engineering.
Frequently Asked Questions
What is the Significant Figures Calculator?
Round a number to a chosen number of significant figures. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Significant Figures Calculator?
The Significant Figures Calculator asks for the following values (2): Number, Significant figures. Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Significant Figures Calculator?
The Significant Figures Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Significant Figures Calculator free, and do I need an account?
Yes. The Significant Figures Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.