Percentage
What is x percent of y, what percent is a of b, and the percentage change from A to B.
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School math
Trigonometry, Pythagoras, a quadratic, logs, combinations and a circle.
Percent change
How much a figure moved, as a percent of the starting value.
Open a calculatorTrigonometry
Sine, cosine and tangent of an angle in degrees, plus the radian.
Open a calculatorPythagoras
Fill two sides of a right triangle; the third and the area come out.
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Real roots of a quadratic, or a linear fallback if a is zero.
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log_base(x), plus the natural log and the common log.
Open a calculatorCombinatorics
Factorial, permutations and combinations for whole n and r.
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Greatest common divisor and least common multiple of two integers.
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Diameter, circumference and area from a radius.
Open a calculatorTriangle area
Area of any triangle from three sides, if they close.
Open a calculatorSnell’s law
The second angle from two indices and an incidence angle.
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