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Math Calculators

Square Root Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
Verified formula Private

Square root

12.000000

Square (n²)
20,736.00
Cube root
5.241483

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Square Root Calculator

The Square Root Calculator works out your square root, along with 2 related figures in an instant. Enter number and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the number.
  2. Read off your square root, together with square (n²) and cube root — the calculator updates automatically, with no button to press.

Formula

The Square Root Calculator uses the formula:

Square root = √(Number)

Worked example

For example, with number of 144, the square root is 12.000000.

Inputs used
Number 144
Results
Square root 12.000000
Square (n²) 20,736.00
Cube root 5.241483

Results are estimates for educational use, not professional advice.

Key terms explained

Square root
A value that, multiplied by itself, gives the original number.

Frequently asked questions

The square root of a number is the value that, multiplied by itself, gives that number. The square root of 144 is 12 because 12 × 12 = 144.

Not within the real numbers. The square root of a negative number is imaginary, so this calculator accepts only zero or positive numbers.

A perfect square is a number whose square root is a whole number, such as 9, 16, 25 and 144. Most numbers have a square root with decimals.

The cube root is the value that, multiplied by itself three times, gives the number. It is shown here as the number raised to the power one third.

The Square Root Calculator uses the formula: Square root = √(Number). For example, with number of 144, the square root is 12.000000.

Enter the number. Read off your square root, together with square (n²) and cube root — the calculator updates automatically, with no button to press.

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