Right Triangle Calculator

Solve a right triangle from any two known values. Find all sides, all angles, perimeter, and area instantly with step-by-step formulas shown. Free calculator, no sign-up needed.

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Sin Cos Tan Calculator

Find sin, cos, tan, csc, sec, and cot for any angle in degrees or radians. Results shown with full formulas and undefined-value warnings. Free trig calculator, no sign-up needed.

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Percentage Calculator

Calculate percentages instantly. Find what percent of a number is, what percentage one number is of another, and calculate percentage increase or decrease. Free online tool.

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Class Average Calculator

Free class average calculator for teachers. Paste a list of grades and instantly get the mean, median, highest, lowest, standard deviation, and letter grade distribution.

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Fraction Calculator

Free fraction calculator that adds, subtracts, multiplies, and divides fractions and mixed numbers. Enter fractions naturally (e.g. 1 2/3) and see full step-by-step solutions.

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