Ratio Calculator
The Ratio Calculator solves for the unknown D in the proportion A:B = C:D and simplifies a ratio to its lowest terms — handy for scaling recipes, mixing ratios, and everyday proportion problems.
How to use
- 1Enter values A, B, and C.
- 2See D calculated instantly.
- 3Also see the simplified A:B ratio.
Why FREE PDF?
- Completely free
- No account required
- Processing happens in your browser whenever possible
- Your files stay yours
Related Tools
Percentage Calculator
Instantly calculate a percentage of a number, or what percent one number is of another.
Percentage Change Calculator
Calculate the percentage increase or decrease between two values.
VAT Calculator
Calculate the VAT amount and totals from an exclusive or inclusive price — in either direction.
Discount Calculator
Calculate the discounted price, the amount you save, or the original price.
Frequently Asked Questions
Can I enter negative or decimal numbers?
Yes, all real numbers are supported.