Essential Math Formulas Every Student Should Know

Basic Arithmetic Formulas

Even the most complex math builds on basic operations. Here are the fundamentals every student needs.

Percentage Formulas

• Percentage = (Part / Whole) × 100

• Part = (Percentage × Whole) / 100

• Percent Change = ((New - Old) / Old) × 100

Geometry Essentials

• Area of Rectangle: A = l × w

• Area of Circle: A = πr²

• Area of Triangle: A = ½ × base × height

• Pythagorean Theorem: a² + b² = c²

Algebra Basics

• Quadratic Formula: x = (-b ± √(b²-4ac)) / 2a

• Slope: m = (y₂ - y₁) / (x₂ - x₁)

• Distance: d = √((x₂-x₁)² + (y₂-y₁)²)

Practice with Our Calculators

Try our Percentage Calculator, Area Calculator, and more to practice these formulas.