Free WordPress Plugin: Quickly round numbers to any number of significant figures. Our free Sig Fig Calculator supports standard, scientific, and e-notation formats. Try it now! www.calculator.io/significant-figures-calculator/

Free WordPress Plugin: Master significant figures with our easy-to-use Sig Fig Calculator. Quickly determine precision, apply rounding rules, and solve math or science equations. www.calculator.io/sig-fig-calculator/

Android App - A significant figures calculator for complex numbers and molar mass calculator for simple chemicals.

C++ math library for tracking significant digits during calculations.

Python module providing an easy way to set the precision of a floating-point number to the desired amount of decimal places, or total amount of significant digits.