Maths Formula Sheets
Every key formula, organised by topic. Each one shows variable definitions, worked step-by-step examples, and direct links to interactive solvers.
Numbers & Indices
Powers, index laws, standard form, surds, and HCF/LCM
Fractions
Operations, equivalents, mixed numbers, and conversions
Percentages
Multipliers, change, reverse %, compound interest, and VAT
Algebra
Expansion, factorising, quadratics, discriminant, sequences
Geometry
2D area, circles, Pythagoras, 3D volume, and polygon angles
Ratio & Proportion
Unit ratios, sharing, scale factors, direct & inverse models
Statistics & Probability
Averages, grouped data, IQR, Tukey fences, and probability
Trigonometry
SOHCAHTOA, sine & cosine rules, area, and exact values
ABOUT THESE FORMULA SHEETS
These formula sheets cover every major topic in secondary school and pre-university maths. Each formula is presented with clear variable definitions and a worked example, so you can see exactly how and when to apply it, not just what it looks like.
Topics include numbers & indices, fractions, percentages, algebra, geometry, ratio & proportion, statistics and trigonometry — the eight core strands of the secondary school maths curriculum. Whether you're revising for an exam, checking a method or helping with homework, these sheets are designed to be quick to use and easy to understand.