Math Calculators
These math calculators handle the everyday arithmetic people look up most often — percentages and percentage change, fraction operations, grade-point averages, and date math such as adding or subtracting days, weeks, months, or years.
Every tool on this page updates instantly as you type. Pick a calculator below to get started.
Add or subtract days, weeks, months, years from a date.
OpenFind the grade you need on your final exam.
OpenAdd, subtract, multiply, and divide fractions and mixed numbers.
OpenWeighted GPA on a 4.0 scale from courses and credits.
OpenMean, median, mode, range, and count from a list.
OpenStrong random passwords with a strength indicator.
OpenThree modes: percent of, percent of total, percent change.
OpenPercent increase or decrease between two values.
OpenRandom integers in a range with optional no-repeat.
OpenMean, population and sample std dev, variance, count.
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