2:3
Ratio Calculator
Use this free ratio calculator to simplify two-part or three-part ratios, find equivalent ratios, split totals by a ratio, and see clear step-by-step work.
Simplify ratios Equivalent ratios Split totals Step-by-step work
Simplify2:3
- Original ratio
- 12:18
- Scaled whole values
- 12:18
- Greatest divisor
- 6
Steps
- Start with the ratio 12:18.
- Clear decimals if needed, giving 12:18.
- Divide each part by the greatest common divisor, 6.
- The simplified ratio is 2:3.
How to use the ratio calculator
- Choose Simplify, Equivalent, or Split total.
- Enter the ratio parts or the known equivalent-ratio values.
- Press Calculate ratio to see the answer, scale factor or shares, and steps.
- Use examples, recent answers, or copy the answer while comparing proportions.
Common uses
Simplify ratios such as 12:18 into lowest terms.
Find an equivalent ratio when one side changes.
Split a total amount into shares using ratio parts.
Compare recipes, mixtures, maps, classroom examples, and proportional relationships.
Examples
20:35
40, 60
Frequently asked questions
Quick answers about simplifying, equivalent ratios, splitting totals, decimals, and privacy.
What can I use the Ratio Calculator for?
Use it to simplify ratios, scale a ratio into an equivalent ratio, or split a total amount into parts based on a ratio.
How do I simplify a ratio?
Enter two or three ratio parts, choose Simplify, and calculate. The calculator clears decimals if needed, then divides each part by the greatest common divisor.
How do equivalent ratios work?
Equivalent ratios keep the same relationship between parts. If 4:7 is scaled so the first part becomes 20, the scale factor is 5 and the second part becomes 35.
How do I split a total by a ratio?
Choose Split total, enter the ratio parts and the total. The calculator adds the ratio parts, finds the value of one part, then multiplies each part by that value.
Can ratios include decimals?
Yes. Decimal ratio parts are accepted in Simplify and Split total modes. The calculator converts them to whole-number parts before simplifying.
Is my ratio history private?
Yes. Recent ratio answers stay only in the current browser tab while you use the page. They are not sent to a server.