Square Root Calculator

Instantly convert between a number x and its principal square root √x.

Number (x) Square root (y)

Step-by-step derivation

Enter any one field to see the derivation.

References

Square root (principal root) and definition (y^2=x).
Exponent notation (x^{1/2}) for (sqrt{x}).

More of our calculators...

Exponent Calculator

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

Log Calculator (Logarithm)

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

Pythagorean Theorem Calculator

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

Slope Calculator

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

Significant Figures Calculator – Sig Fig

Count significant figures and round to a set number of sig figs. Handles zeros, decimals, scientific notation, and operations (×, ÷, +, −). Instant results with rules, steps & PDF.

Percentage Increase Calculator

Find the percentage increase between two numbers. Enter original and new values to get % increase, change amount, and final value. Reverse solve from % too. Instant steps & PDF.

Circumference Calculator

Free circumference calculator for circles. Enter radius or diameter to get circumference instantly. Supports multiple units and shows the formula with clear steps.