Math and Numbers
Calculate percentages, fractions, roots, logarithms, prime numbers, and convert between number bases and formats.
Math and Numbers tools
Which Math Calculator Do You Need?
Most everyday math questions fit one of a few tools. For discounts, test scores or price rises, the Percentage Calculator handles "X% of Y" and percent change. For recipes and measurements, the Fraction Calculator adds, subtracts, multiplies and divides fractions and simplifies the answer.
Switching between number forms is a separate job. The Decimal to Fraction Converter turns 0.375 into 3/8. It also suggests the closest simple fraction, so a rounded 0.3333 becomes 1/3. For very large or very small values, such as the distance to a star, the Scientific Notation Converter writes them as powers of ten.
For algebra and geometry, the Quadratic Equation Solver gives real or complex roots and draws the parabola. The Triangle Calculator solves a triangle from three known values, such as two sides and the angle between them. For a right triangle, the Pythagorean Theorem Calculator is quicker. If you have a longer formula, type it into the Math Expression Evaluator. It follows the normal order of operations and lets you set variables.