These Ratio Calculators are part of the suite of free online math calculators designed and maintained by iCalculator. Please choose one of the ratio calculators from the selection below. If you are looking for a bespoke ratio calculator for a certain ratio calculation that is not featured in our suite of ratio calculators, please contact us and we will build the ratio calculator and add it to our suite for you and our other communities free use online. A Ratio is a mathematical term to show the relationship between two numbers of the same kind, ratios are used very commonly in every day life, these math ratio calculators provide means of computing and converting ratios online.

- Aspect Ratio Calculator
- Ratio Calculator
- Ratio Division Calculator
- Ratio Calculator
- Ratio Simplifier Calculator
- Ratio to Fraction Calculator
- Golden Ratio Calculator

The following calculators provide good example of ratios in every day life.

- Logistics: Pallet Calculator
- Construction: Concrete Mix Ratio Calculator
- Engineering: Gearbox Ratio Calculator
- Maritime: Sea Level Pressure Calculator
- Mortgages: Loan to Value Calculator
- Health: Fat Free Mass Calculator
- Sports: One Rep Max Calculator
- Economics: Inflation Calculator

Ratios can be expressed in a numbers of ways, as a decimal, a fraction as a related comparison or as is more commonly seen a percentage. for example a ratio of 1 to 2 can be expressed as:

- 1-2 is a ratio expressed in using a hyphen, whilst this is quite commonly used it should be avoided as the hyphen also represents the minus sign in math and can be confusing in long algorithms or if using computer code or computers to process a math calculation
- 1:2 is a ratio expressed in typical math format using a colon
- 1 to 2 is a ratio expressed in written words
- 1 per 2 is a ratio expressed in written words
- 0.5 is a ratio expressed as a decimal number
- 50% is a ratio expressed as a percentage
- ½ is a ratio expressed as a fraction