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Calculators that show the thinking.
Fast, accurate online math calculators for geometry, fractions, statistics, algebra, probability, and computer science. Get the answer, the formula, and the next step in one calm interface.
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Showing all 20 calculators
Geometry
Area Calculator
Use this area calculator for rectangles, circles, triangles, trapezoids, and surface area with formulas, units, and clear steps.
Open calculatorStatistics
Average Calculator
Use this average calculator to find the mean, median, mode, range, and weighted average of numbers with transparent working.
Open calculatorAlgebra
Long Division Calculator
Use this long division calculator with steps for quotients, remainders, decimals, and a clear multiply-subtract-bring-down method.
Open calculatorGeometry
Pythagorean Theorem Calculator
Use this Pythagorean theorem calculator to find a missing right-triangle side, angles, and clear substitutions for a, b, or c.
Open calculatorFractions
Fraction to Decimal Calculator
Convert fractions to decimals with this fraction to decimal calculator, including mixed numbers, improper fractions, and repeats.
Open calculatorFractions
Decimal to Fraction Calculator
Use this decimal to fraction calculator to reduce decimals, show the algebra, and return an exact fraction or mixed number.
Open calculatorFractions
Simplify Fraction Calculator
Use this simplify fraction calculator to reduce fractions, find the greatest common factor, and show equivalent steps clearly.
Open calculatorFractions
Fraction to Percent Calculator
Convert fractions to percentages with this fraction to percent calculator, including percent to fraction and decimal conversions.
Open calculatorGeometry
Perimeter Calculator
Use this perimeter calculator for rectangles, circles, triangles, and trapezoids with formulas, units, and optional area results.
Open calculatorAlgebra
Sequence Calculator
Use this sequence calculator to find arithmetic, geometric, number-sequence, and Fibonacci terms, sums, differences, and ratios.
Open calculatorAlgebra
Logarithm Calculator
Use this logarithm calculator with steps for natural log, common log, and any valid base, including change-of-base working.
Open calculatorAlgebra
Cube Root Calculator
Use this cube root calculator for positive and negative values, exact cubes, decimal answers, and optional nth-root calculations.
Open calculatorComputing
Decimal to Binary Converter
Use this decimal to binary converter for base 2–36, binary to decimal, hexadecimal, octal, and exact generic base conversions.
Open calculatorStatistics
Sample Standard Deviation Calculator
Use this sample standard deviation calculator for mean, variance, range, population deviation, and sample size with clear steps.
Open calculatorProbability
Binomial Probability Calculator
Use this binomial probability calculator for binomial, conditional, dice, and normal distribution questions with clear steps.
Open calculatorArithmetic
GCF Calculator
Use this GCF calculator to find the greatest common factor, LCM, prime factors, and factor lists with clear steps.
Open calculatorGrades
Weighted Grade Calculator
Calculate weighted grades, current course averages, and the final exam score needed to reach a target grade.
Open calculatorGrades
Semester Grade Calculator
Calculate a credit-weighted semester average and project the grade needed in remaining college courses.
Open calculatorPercentages
Average Percentage Calculator
Calculate average percentages, test scores, percentage increase, discounts, tax, and final prices with visible formulas.
Open calculatorPercentages
Win Percentage Calculator
Calculate winning percentage from wins, losses, and ties, then find the wins needed to reach a target rate.
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Find a focused calculator for every maths question.
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FractionsFraction Simplifier reduces fractions to lowest terms and explains the greatest common factor behind every step.GeometryArea Calculator finds the area of common shapes and keeps the correct formula and square units visible.StatisticsAverage Calculator calculates mean, median, mode, range, and weighted averages from an easy-to-check list of values.AlgebraLong Division Calculator and Logarithm Calculator show the working for quotients, remainders, exponents, natural logs, and any valid base.ProbabilityProbability Calculator helps solve binomial, conditional, dice, and normal-distribution questions with the assumptions explained.ComputingNumber Base Converter converts exact integers between binary, decimal, octal, hexadecimal, and other bases used in computer science.ArithmeticGCF Calculator finds greatest common factors, least common multiples, prime factors, and factor lists for everyday maths.Grades and percentagesWeighted Grade Calculator and Average Percentage Calculator make course planning, test scores, percentage change, discounts, and tax calculations easier to understand.