Ratio Calculator

Simplify ratios to lowest terms and scale them to a target value.

Value A

Value B

Scale A to (optional)

Simplified ratio

2 : 3

How it works

Both values are divided by their GCD. Scaling multiplies both sides so A equals your target.

Find percentages, percent of a number, and percent change.

Add, subtract, multiply, and divide fractions.

Solve ax² + bx + c = 0 and show the discriminant.

Calculate area of rectangles, circles, triangles, and trapezoids.