How to use: Calculate any root of a number (square root, cube root, nth root). Enter Number (value to find root of) and Root Index (2 for square root, 3 for cube root, 4 for fourth root, etc.). Results show the root value. Formula: ⁿ√x = x^(1/n). Examples: √16 (index=2) = 4, ³√27 (index=3) = 3, ⁴√81 (index=4) = 3. Square roots most common: √100=10, √64=8, √49=7, √36=6, √25=5. Applications: geometry (diagonal calculations), physics (velocity from kinetic energy), finance (compound interest), statistics (standard deviation calculations). Cube roots used for volume to linear dimension conversions. Essential for algebra, geometry, and advanced mathematics.