Math calculators
Free tools for percentages, fractions, statistics, equations, and more. Instant answers with step-by-step formulas — no signup needed.
Everyday math
Percentage Popular
Calculate percent of a number, percentage increase/decrease, and percentage difference between two values.
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Fraction
Add, subtract, multiply, divide fractions. Simplify to lowest terms and convert to decimals.
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Exponent
Calculate powers (xn), roots, and scientific notation. Works with decimals and negative exponents.
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Scientific
Full scientific calculator with trig, logarithms, powers, roots, constants, and memory functions.
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Algebra & statistics
Quadratic equation
Solve ax² + bx + c = 0. See both roots, discriminant, and the vertex of the parabola.
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Standard deviation
Calculate mean, variance, standard deviation, and more for any data set. Population and sample modes.
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GCD & LCM
Find the greatest common divisor and least common multiple of two or more numbers.
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Probability
Calculate single event, multiple event, and conditional probability. Includes permutations and combinations.
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Number systems
Binary
Add, subtract, multiply, divide binary numbers and perform bitwise AND, OR, XOR, NOT operations.
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Hex
Hexadecimal arithmetic and logic. Results shown in hex, decimal, and binary side by side.
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Binary → Decimal
Convert binary to decimal with step-by-step position-value breakdown.
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Decimal → Binary
Convert decimal to binary using repeated division-by-2, with every step shown.
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About math calculators
Every calculator here shows the formula used and works instantly as you type. They are built for students, teachers, professionals, and anyone who needs a quick, reliable math answer.
Which calculator should I use?
- Shopping discounts? Percentage calculator handles % of, increase, and decrease.
- Homework help? Fractions, quadratic equations, or the scientific calculator.
- Data analysis? Standard deviation for statistics and probability for likelihood.
Common questions
Are these suitable for school/college exams?
These calculators are great for checking your work and understanding formulas. Most exams don't allow calculators, but using these to practise and verify answers is the best way to learn.
Do you show the working steps?
Each calculator shows the formula used and key intermediate values. For step-by-step solutions, we recommend pairing these with your textbook.
Can I use these on my phone?
Yes. All calculators are mobile-responsive and work on any device with a browser.