Math calculators
Free percentage, fraction, geometry, logarithm, GCD, LCM and quadratic calculators for homework help and quick answers.
Percentage Calculator
What is X% of Y?
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Fraction Calculator
Add, subtract, multiply, divide fractions.
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Scientific Calculator
Type expressions, get answers.
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Triangle Calculator
Area and angles from three sides.
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Area Calculator
Areas of common shapes.
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Ratio Calculator
Simplify and scale ratios.
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Quadratic Equation Solver
Real and complex roots of ax² + bx + c.
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Standard Deviation
Mean, variance, sample & population SD.
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Prime Factorization
Break any integer into prime factors.
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Permutations & Combinations
nPr and nCr for any n, k.
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Rule of Three Calculator
Solve simple proportions in seconds.
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Percentage Change Calculator
Increase or decrease between two values.
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LCM & GCD Calculator
Greatest common divisor and least common multiple.
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Logarithm Calculator
log, ln, log₁₀, log₂ in any base.
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Rounding Calculator
Round numbers up, down, or to nearest.
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