Math Calculators - Free Online Tools for Algebra and Geometry
Area Calculator
Work out the area and perimeter of eight common shapes. Pick the shape, fill in the measurements it needs, and the answer updates as you type.
Fraction Calculator
Add, subtract, multiply or divide two fractions. The answer is simplified and also shown as a mixed number and a decimal, so you can use the form you need.
GCF and LCM
Find the greatest common factor and lowest common multiple of two or more whole numbers, with the prime factorisation of each one shown alongside.
Ohm's Law
Enter any two of voltage, current, resistance and power, and the other two are worked out for you. Every pairing is supported, not just volts and amps.
Quadratic Solver
Enter a, b and c to solve ax² + bx + c = 0. You get the roots, the discriminant that decides how many there are, and the vertex of the parabola.
Scientific Calculator
A scientific calculator with trigonometry, logarithms, powers, roots and factorials. Type an expression or use the keypad; degrees and radians both supported.
Scientific Notation
Convert between ordinary decimals and scientific notation in either direction, with engineering notation and a significant figures count alongside.
Standard Deviation
Paste a list of numbers and get the standard deviation, variance, mean, median, mode and range at once - both the sample and the population version.
Slope Calculator
Give two points and get the slope between them, the equation of the line, the angle it makes, the distance and the midpoint - all at once.
Triangle Calculator
Solve a right triangle from any two sides, or a general triangle from all three. You get the missing side, all three angles, the area and a drawing to scale.
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Math Calculators