Math Calculators
From everyday percentages to scientific expressions. Make numbers make sense.
Math & Numbers tools
Percentage Calculator
Find a percentage of a number, a percentage share, or the whole from a known part.
Math & NumbersPercentage Change Calculator
Measure the relative increase or decrease between an original and a new value.
Math & NumbersFraction Calculator
Work with fractions and mixed numbers, simplify a fraction, or convert a decimal exactly.
Math & NumbersAverage Calculator
Calculate the arithmetic mean, median, sum, and range of a list.
Math & NumbersRatio Calculator
Simplify ratios, scale two quantities, or solve the missing quantity in a proportion.
Math & NumbersScientific Calculator
Evaluate arithmetic, powers, roots, logarithms, and trigonometric expressions.
Math & NumbersStandard Deviation Calculator
Measure the spread of a population or sample with variance and mean.
Math & NumbersExponent Calculator
Raise a base to a power and inspect the resulting real number.
Math & NumbersGCF & LCM Calculator
Find the greatest common factor and least common multiple of integers.
Math & NumbersRandom Number Generator
Generate one or many random integers, with optional unique sampling.
Math & NumbersRecommended calculators
Choose the right arithmetic or statistics tool
Use Percentage for a part of a whole, and Percentage Change for growth between two values. Fraction keeps integer numerators and denominators explicit; Ratio simplifies quantities into relative shares. Average summarizes the center of a list, while Standard Deviation measures its spread.
Which percentage calculator should I use?
Choose Percentage to find 20% of 150, a percentage share, or the whole from a part. Choose Percentage Change to compare an original value with a new one, such as 80 increasing to 100.