⚖️Ratio Calculator
Simplify, solve, scale, or split ratios — with the working shown every time.
Free Ratio Calculator
Whether you're simplifying a ratio, solving a proportion, or splitting a total fairly, our free ratio calculator handles it instantly — with the working shown every time.
Simplify any ratio to lowest terms using the greatest common factor, solve for a missing value in a proportion like A:B = C:D via cross multiplication, scale a ratio up or down by a factor, or split a total quantity proportionally across two or more parts — seeing exactly how much each share is worth and what fraction of the whole it represents.
Every mode shows the underlying arithmetic, not just the final answer. Invalid inputs, like a zero term in a proportion, are flagged clearly. No sign-up, no downloads, no limits.