Square root
Find the principal square root of a non-negative number.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
r = √n, with r ≥ 0
Variables & units
- Number
- Numeric value · minimum 0, maximum 1000000000
Worked example
√144 = 12.
Assumptions
√n is the principal non-negative root. The equation x² = n can have two roots.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
Calculated on your device. Your latest 100 calculations stay in this browser.