Ratio Simplifier

Reduce any ratio to simplest form, scale it to a new value, or split an amount fairly — with every step shown.

2–4 terms separated by colons, positive numbers — decimals are fine, e.g. 4:8:12 or 0.75:1.5

Scale the ratio

Divide an amount in this ratio

How to use the ratio simplifier

  1. Type your ratio with colons between terms — 2 to 4 terms, e.g. 12:18 or 4:8:12. Decimals are fine.
  2. Press Simplify to get the ratio in lowest terms, the GCF, and every division step.
  3. To resize the ratio, enter the new value for the first term and press Scale ratio — every term grows or shrinks by the same factor.
  4. To split money or points, enter the amount and press Divide amount — each share and its percentage are listed.

Frequently asked questions

What does it mean to simplify a ratio?

Divide every term by their greatest common factor (GCF) — the biggest number that divides all of them. 12:18 becomes 2:3 because 6 divides both.

How do you simplify a ratio with decimals?

Multiply every term by a power of 10 to clear the decimals first, then divide by the GCF. 0.75:1.5 becomes 75:150, and dividing by 75 gives 1:2.

How do you scale a ratio up or down?

Multiply every term by the same number. To scale 2:3 so the first term is 10, multiply by 5 (10 ÷ 2) to get 10:15.

How do you divide an amount in a given ratio?

Add the terms to get the total parts, then each share gets its fraction of the amount. $100 in ratio 2:3 means 5 parts, so the shares are $40 and $60.

Can a ratio have more than two terms?

Yes — this tool handles 2 to 4 terms. 4:8:12 simplifies to 1:2:3 by dividing every term by 4.

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