Ratio & Proportion Calculator
Simplify ratios, solve missing values in proportions (A:B = C:D), and divide quantities into multiple parts by ratio.
Complete User Guide
Simplify Ratio: reduce to lowest terms. Solve Proportion: enter 3 of 4 values and find the unknown. Divide into Parts: split a total by ratio (e.g., 2:3:5 of 100 = 20, 30, 50).
The Mathematical Formula
A/B = C/D → A×D = B×C
Simplify: divide by GCD. Example: 12:8 → GCD=4 → 3:2. Proportion: D = B×C/A (cross-multiply). Divide: sum ratio, each part = (ratio/sum)×total.
Frequently Asked Questions
Related Tools
Calculate
Verified Precise
Secure 100% Free Precise