Formula hub

Math formulas by course

80 key formulas, each with a one-line meaning and a link to the worked examples that use it. Pick a course to see its sheet.

• Pre-Algebra formulas

  Grades 6 to 8

  Order of operations, negative numbers, ratios and rates.

  8 formulas

• Algebra 1 formulas

  Grades 8 to 9

  Equations, systems of equations and linear functions.

  7 formulas

• Algebra 2 formulas

  Grades 9 to 11

  Quadratics, factoring, exponents and radicals.

  13 formulas

• Geometry formulas

  Grades 9 to 10

  Triangles, circles, area and volume.

  10 formulas

• Trigonometry formulas

  Grades 10 to 12

  Right triangles, radians, the unit circle and sine waves.

  9 formulas

• Precalculus formulas

  Grades 10 to 12

  Functions, logarithms, sequences and series.

  12 formulas

• Calculus formulas

  Grades 11 to 12

  Limits, derivatives and integrals.

  11 formulas

• Statistics formulas

  Grades 11 to 12

  Mean, median, range and probability.

  10 formulas

A formula is only useful when you can use it. Each formula page links to a full solution that puts the formula to work, step by step. Start with the worked-example library.