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1Introduction
The Ratio Calculator is a simple, practical online math tool. Enter any three known values in a ratio expression or table and it automatically calculates the fourth unknown - for example with a:b = c:x, entering a, b, and c gives you x. The tool supports integer, decimal, and fraction input, preserving original precision throughout the calculation for clear, accurate results. Fractions can participate directly in operations without converting to decimals first, making it convenient for quickly verifying answers or handling continuous ratios. Whether students solve ratio problems, cooks scale recipes by number of people, or engineers scale drawing dimensions, it comes in handy. It eliminates tedious manual cross-multiplication and lowers the error rate, making numeric calculation easier.
2How to Use
Fill in the known values
Enter any three known terms in the ratio expression or table, leaving the unknown term blank.
Choose the input format
Select integer, decimal, or fraction based on the value type. Fractions can be entered directly as a/b.
Calculate and view
Click the "Calculate Ratio" button to get the precise unknown term. Continuous ratio verification is supported.
3FAQ
How to use the Ratio Calculator?
Enter three known values in the ratio, leave the unknown blank, and click 'Calculate' to get the answer.
Does it support fractional input?
Yes, you can input fractional values, and the tool will process them automatically.
