Math Calculators
Free calculators for school math: fractions, percentages, scientific notation, exponents, roots, and more.
Start with the everyday calculations students search for most often. Each calculator focuses on one job, shows the formula, and links to related tools.
Scientific Calculator
Use a free online scientific calculator for trigonometry, logarithms, powers, parentheses, constants, and calculation history.
Open calculatorCalculatorsPercentage Calculator
Calculate percent of a value, percent change, missing totals, discounts, tips, and ratios with clear examples.
Open calculatorCalculatorsPercentage Change Calculator
Calculate percent increase or decrease between two values and see the formula, substitution, and result.
Open calculatorCalculatorsLog Calculator
Calculate logarithms with any positive base, including natural log, common log, and change-of-base steps.
Open calculatorCalculatorsRatio Calculator
Simplify ratios, compare equivalent ratios, and solve proportions such as a:b = c:x.
Open calculatorCalculatorsPercent Error Calculator
Calculate absolute error, relative error, and percent error from measured and accepted values.
Open calculatorCalculatorsStandard Deviation Calculator
Calculate population and sample standard deviation, variance, mean, and count from a list of numbers.
Open calculatorCalculatorsMean Median Mode Range Calculator
Find the mean, median, mode, range, count, minimum, and maximum for a data set.
Open calculatorCalculatorsFraction Calculator with Steps
Add, subtract, multiply, and divide fractions or mixed numbers with exact reduced results and step-by-step work.
Open calculatorCalculatorsDecimal to Fraction Calculator
Convert a decimal number to a reduced fraction and see how place value determines the denominator.
Open calculatorCalculatorsFraction to Decimal Calculator
Convert fractions and mixed numbers to decimals with division steps and reduced fraction context.
Open calculatorCalculatorsExponent Calculator
Calculate powers such as x^n, including negative exponents, and see the rule used to evaluate the expression.
Open calculatorCalculatorsSquare Root Calculator
Find square roots, approximate decimal values, and simplified radical form for positive whole numbers.
Open calculatorCalculatorsScientific Notation Calculator
Convert numbers to scientific notation and standard form with coefficient and power-of-ten steps.
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