Math

Algebra, geometry, statistics, sequences.

11 calculators · 4 sub-fields

Percentage

4 calculators

Discount calculator Sale price after a percent or flat discount, with optional tax. →
Fraction calculator Add, subtract, multiply or divide two fractions, with simplification. →
Percentage Percentage, increase, discount. →
Ratio calculator (A:B = C:D) Solve any of A, B, C, D in a proportion with GCD simplification and dual proportion bars. →

Triangle

2 calculators

Right triangle calculator Sides, angles, area, hypotenuse via Pythagoras and SOHCAHTOA. →
Triangle solver Compute angles, area, heights and radii of a triangle from its three sides. →

Arithmetic

4 calculators

Trigonometry

Sin, cos, tan and the unit circle.

1 calculator

Unit circle calculator Sin, cos, tan and the three reciprocals from any angle in degrees or radians, with the unit circle and the sine/cosine waves drawn alongside. →