Significant Figures Calculator

About Significant Figures Calculator

A significant figures calculator that counts the number of significant digits in any number and can round to a desired number of sig figs. Shows which digits are significant and why, explains the rules applied, and handles edge cases like trailing zeros, scientific notation input, and exact numbers. Supports arithmetic operations (add, subtract, multiply, divide) with proper sig fig propagation. Essential for chemistry, physics, and engineering students following measurement precision rules.

Significant Figures Calculator Features

• Count sig figs
• Round to N sig figs
• Rule explanation
• Scientific notation
• Arithmetic with sig figs