Direct Proportion
Direct proportion keeps y divided by x constant. A line through the origin is the defining model.
Direct Proportion
Ratios · 3 inputs
How to use this calculator
- Enter known x in units.
- Enter known y in units.
- Enter new x in units.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
A nonzero intercept requires a linear equation, not direct proportion.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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Inverse Proportion
Inverse proportion keeps the product of two quantities constant.
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The greatest common divisor identifies the largest exact shared grouping.
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