Free Math Calculators.
Solve algebra, percentages, fractions, geometry, trigonometry, calculus, and statistics problems with fast, easy-to-follow step-by-step solutions.
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Percentages
Calculate basic percentages, percentage increases, decreases, difference, and percent change.
Arithmetic
Solve arithmetic problems involving operations, factors, multiples, GCF, LCM, prime numbers, remainders, and rounding.
Algebra
Solve linear equations, quadratic formulas, polynomial roots, systems of equations, and algebraic expressions.
Fractions
Solve fraction arithmetic, reduce to lowest terms, convert mixed numbers, find common denominators, and calculate ratios.
Ratio & Proportion
Solve missing terms with cross-multiplication, simplify lowest-term ratios, scale dimensions, and divide quantities proportionally.
Triangle Calculators
Solve right triangles, calculate Pythagorean theorem hypotenuse, triangle area (Herons formula), and angles with interactive dynamic SVG diagrams.
Circle Calculators
Calculate circle area (πr²), circumference (2πr), diameter, arc length, sector area, and annular rings with interactive dynamic SVG diagrams.
2D Geometry
Calculate area, perimeter, and diagonals for rectangles, squares, trapezoids, parallelograms, rhombuses, and regular n-sided polygons with interactive dynamic SVG diagrams.
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Why Use AptCalc Math Calculators?
Solve math problems online with easy-to-follow calculations and step-by-step solutions. AptCalc provides useful tools for algebra, percentages, fractions, geometry, trigonometry, calculus, and statistics.
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