Math Calculators
Solve everyday, scientific and number problems with accurate calculators.
Calculate with a full keypad, memory controls and reusable history.
Open toolSolve scientific expressions with trigonometry, logarithms, powers and roots.
Open toolCalculate population or sample standard deviation, variance and mean.
Open toolCalculate single-event probability or combine two independent events with AND or OR.
Open toolAnalyze a data set with central tendency, spread, variance and standard deviation.
Open toolCalculate nPr and nCr to count ordered arrangements and unordered selections.
Open toolEstimate a creator revenue scenario from separate long-form and Shorts views, user-supplied RPM assumptions and other recurring income.
Open toolRaise any base to a positive, negative or decimal exponent.
Open toolCalculate square, cube and higher roots, including odd roots of negative numbers.
Open toolRound decimals or whole numbers using nearest, up, down or truncate modes.
Open toolFind the least common multiple of two or more whole numbers.
Open toolFind the greatest common factor of two or more whole numbers.
Open toolBreak a whole number into its prime factors and exponent form.
Open toolFind a missing right-triangle side, then calculate its area and perimeter.
Open toolCalculate logarithms with any valid base and compare ln and log10 results.
Open toolAdd, subtract, multiply or divide fractions and simplify the result.
Open toolFind the mean, median, sum, count, minimum and maximum of a number set.
Open toolSimplify a ratio to its lowest whole-number terms and view its decimal value.
Open toolSolve ax² + bx + c = 0 and find its roots, discriminant and vertex.
Open toolWork out percentages and ratios quickly.
Open toolGenerate a bounded Fibonacci-style integer sequence from optional starting values.
Open toolAdd, subtract, multiply or divide valid Roman numerals and return decimal and Roman results.
Open toolAbout Math Calculators
Our math calculators solve everyday, scientific and number-theory problems with clear, accurate results. From quick percentage and average calculations to standard deviation, permutations and quadratic equations, there is a focused calculator for each task.
Each calculator shows its result instantly and, where helpful, explains the steps so you can check your work rather than trusting a black box. That makes them useful for students, teachers, engineers and anyone who needs a dependable answer fast.
Like all ToolsOnDuty tools, they run in your browser with no sign-up, so you can calculate as much as you like for free.