All calculators
53 free calculators across six subjects, each with full step-by-step working and verified answers.
Algebra
Quadratic Formula CalculatorReal and complex roots with steps.Slope CalculatorSlope from two points, rise over run.Algebra SolverSolve ax + b = cx + d for x.System of Equations CalculatorSolve two linear equations in x and y.Factoring CalculatorFactor ax² + bx + c into binomials.X-Intercept CalculatorFind where any line or parabola crosses the x-axis.Inequality SolverSolve linear inequalities with the sign-flip rule explained.Matrix CalculatorAdd, multiply, determinant, inverse, transpose with steps.Expression SimplifierCombine like terms in polynomials, step by step.Dot Product Calculatora · b with magnitudes and the angle between vectors.
Geometry
Cylinder VolumeV = πr²h, exact and decimal.Cone VolumeV = (1/3)πr²h with steps.Pyramid Volume(1/3) × base × height.Circle AreaA = πr², exact and decimal.Trapezoid AreaA = (1/2)(a+b)h.Pythagorean Theorem CalculatorSolve for any side of a right triangle.Midpoint CalculatorMidpoint of two points with steps.Surface Area CalculatorCube, prism, sphere, cylinder, and cone surface areas.Distance CalculatorDistance between two points with the formula shown.
Statistics
Average CalculatorMean with addition steps shown.Standard Deviation CalculatorPopulation & sample SD with steps.Mean, Median & ModeCompare all three averages.Z-Score CalculatorStandard scores with interpretation.Probability CalculatorBasic probability, combinations and permutations.Weighted Average CalculatorGrades, GPA, credit hours with steps.
Calculus
Derivative CalculatorDifferentiate polynomials, power rule steps.Integral CalculatorAntiderivatives with reverse power rule.Triple Integral CalculatorPolynomial triple integrals over a box, step by step.Partial Derivative Calculator∂/∂x, ∂/∂y, ∂/∂z for polynomials, step by step.Composite Function Calculator(f ∘ g)(x) and (g ∘ f)(x), expanded step by step.
Graphing
General math
Proportion CalculatorSolve a/b = c/d for the missing value.Ratio CalculatorSimplify ratios to lowest terms.GCF CalculatorGreatest common factor with Euclidean steps.LCM CalculatorLeast common multiple via the GCF.Factor CalculatorPrime factorization with division steps.Fraction CalculatorAdd, subtract, multiply, divide fractions.Percentage CalculatorPercent of, what percent, percent change.Decimal to Fraction Calculator0.875 → 7/8 with GCD simplification steps.Fraction to Decimal CalculatorIncluding repeating decimal detection.Mixed Fraction CalculatorMixed ↔ improper fraction conversion.Long Division CalculatorDivide with full step-by-step long division working shown.Binary TranslatorConvert text to binary and binary back to text.Word Problem SolverPercentage, distance and age problems, step by step.
Browse by subject: Algebra · Geometry · Statistics · Calculus · General math
Practical calculators
Square Footage CalculatorRoom area in square feet and square yards.Gravel CalculatorHow much gravel you need, in cubic yards and tons.Cubic Yard CalculatorVolume in cubic yards from feet measurements.Asphalt CalculatorAsphalt tonnage for driveways and patches.Stone CalculatorConvert between stones, pounds, and kilograms instantly.
Conversions
Length Unit Convertermm, cm, m, km, inches, feet, yards, miles.Radians to Degrees ConverterConvert angles both directions, with steps.
New calculators
Long Division CalculatorDivide with full step-by-step long division working shown.Stone CalculatorConvert between stones, pounds, and kilograms instantly.X-Intercept CalculatorFind where any line or parabola crosses the x-axis.Surface Area CalculatorCube, prism, sphere, cylinder, and cone surface areas.Binary TranslatorConvert text to binary and binary back to text.Matrix CalculatorAdd, multiply, determinant, inverse, transpose with steps.Inequality SolverSolve linear inequalities with the sign-flip rule explained.Probability CalculatorBasic probability, combinations and permutations.Word Problem SolverPercentage, distance and age problems, step by step.Distance CalculatorDistance between two points with the formula shown.Expression SimplifierCombine like terms in polynomials, step by step.Weighted Average CalculatorGrades, GPA, credit hours with steps.Triple Integral CalculatorPolynomial triple integrals over a box, step by step.Partial Derivative Calculator∂/∂x, ∂/∂y, ∂/∂z for polynomials, step by step.Composite Function Calculator(f ∘ g)(x) and (g ∘ f)(x), expanded step by step.Dot Product Calculatora · b with magnitudes and the angle between vectors.Square Footage CalculatorRoom area in square feet and square yards.Gravel CalculatorHow much gravel you need, in cubic yards and tons.Cubic Yard CalculatorVolume in cubic yards from feet measurements.Asphalt CalculatorAsphalt tonnage for driveways and patches.Length Unit Convertermm, cm, m, km, inches, feet, yards, miles.Radians to Degrees ConverterConvert angles both directions, with steps.Decimal to Fraction Calculator0.875 → 7/8 with GCD simplification steps.Fraction to Decimal CalculatorIncluding repeating decimal detection.Mixed Fraction CalculatorMixed ↔ improper fraction conversion.Z-Score CalculatorStandard scores with interpretation.