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Ratio Calculator
Calculate and simplify ratios, find equivalent ratios, or solve ratio proportions.
About This Calculator
Ratios express the relative size of two quantities. The golden ratio (φ ≈ 1.618) appears in art, architecture, and nature. The S&P 500's price-to-earnings ratio is one of the most widely watched ratios in finance. Map scales, cooking recipes, and pharmacological dilutions all use ratio math.