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Ratio Calculator
Reduce a ratio to its simplest form and solve proportions by leaving one value blank.
Simplify a ratio
:
Simplified: 3 : 4(0.7500)
Solve a proportion (leave one blank)
18 : 24 =:
d = 4
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
What can it do?＋
Simplify a ratio to its lowest terms, and solve proportions where one value in A:B = C:D is unknown.
How does it simplify?＋
It divides both parts by their greatest common divisor, so 8:12 becomes 2:3.
Is my data uploaded?＋
No — it's calculated locally.