±Percent Error Calculator

Find the percent error between an observed and a true value.

Observed Value

-1,000,000 1,000,000

True Value

-1,000,000 1,000,000

—

About this calculator

Free Percent Error Calculator — find the percentage error between an observed value and the true value.

Enter your Observed Value, True Value above — the result updates instantly as you type or drag the sliders. It's free and needs no sign-up.