Math
Percentages, fractions, powers and other math calculations.
5 calculators
Math
Percentage Calculator
Percentages are everywhere: discounts, interest, VAT and grades. This calculator answers the three most common percentage questions in a single click.
Proportion Calculator
A proportion like A/B = C/X comes up in scale drawings, recipes and conversions. Enter A, B and C to find the missing X.
RREF Calculator (Matrix)
Enter the coefficients of a system of three linear equations in three unknowns (x, y, z). The calculator reduces the associated matrix to reduced row echelon form (RREF) using Gauss-Jordan elimination and shows the solution.
Percentile Calculator (Z-score)
A percentile shows how a value compares to the rest of a dataset โ for example a test score, height, or any other trait that is approximately normally distributed. Enter your value along with the mean and standard deviation of the reference group to find your percentile.
Fraction Calculator
Adding, subtracting, multiplying or dividing fractions requires a common denominator or cross-multiplication. Enter both fractions and pick an operation for an instant, simplified answer.