Proportion calculator
Solve a:b = c:x and simplify the original ratio.
Enter your values, then choose Calculate.
Limits
- Positive safe whole-number inputs for a, b and c. The result may be fractional. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
- Desktop limits are provisional. Physical mobile and Safari verification remains open.
What happens to your data
Proportion calculator runs inside this browser tab, and the page's code comes from this site. There is no application server to receive your data, and the site's security policy limits connections to this site.
Good to know
- Positive safe whole-number inputs for a, b and c. The result may be fractional. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
- Desktop limits are provisional. Physical mobile and Safari verification remains open.