โ Math
Significant Figures Calculator
Significant figures express the precision of a measurement. Scientific work reports results to the number of significant figures justified by the least precise input, rather than to a fixed number of decimal places.
How it works
Number
Significant figures
Rounded value
Order of magnitude
Exponent
Decimal places needed
Frequently asked questions
How do I use the Significant Figures Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.