Calculate percentage of a percentage, cumulative percent, and final value from any input. Instant syncing fields. Free online tool.

Calculate percent of a number, what percent one number is of another, and find the whole from a percent. Live-sync results.

Use our Percentage Change Calculator to quickly find percent increase or decrease between two values. Instant results, step-by-step breakdown, free & easy to use.

Instantly calculate percent decrease, final value, and difference with this interactive percent decrease calculator. Free, accurate, and easy to use.

Convert fractions to percentages and percentages to fractions instantly. Enter n, d or p% and see live, simplified results.

Quickly compute a = b^x with this free exponent calculator. Enter base and exponent to get instant, precise results.

Free logarithm calculator: compute log, ln, log10, or any base (b). Convert between bases, solve a^x = b, get antilog, and more.

Calculate missing side, area & perimeter of a right triangle using the Pythagorean theorem. Enter any two sides, choose units, get instant results

Free slope calculator: find slope from two points or from rise and run. Get slope ratio, percentage grade, and angle (deg/rad).