Direct Variation Calculator

Enter x and the constant of variation k to calculate y and view the direct-variation equation.

Constant k

y = 30y = kx

How to use this Direct Variation Calculator

Calculate y = kx for direct variation and solve the proportional relationship. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.