Free WordPress Plugin: Significant figures are essential in various situations. Here, we determine the rules of sig figs and how we can apply them in the real world. www.calculator.io/sig-fig-calculator/

Free WordPress Plugin: The significant figure rounder rounds numbers to the required quantity of significant figures. It works with a standard number format, e-notation, and scientific notation. www.calculator.io/significant-figures-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.