Harmonic Mean Calculator
Calculate the harmonic mean of three numbers — the right average for rates like speeds.
Formula: H = 3 / (1/a + 1/b + 1/c)
About Harmonic Mean Calculator
Harmonic Mean Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the harmonic mean of three numbers — the right average for rates like speeds.
The calculation uses the standard formula H = 3 / (1/a + 1/b + 1/c) and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
The harmonic mean is the correct average for round trips at different speeds and is always at most the arithmetic mean.
Frequently Asked Questions
Is Harmonic Mean Calculator free to use?
Yes. Harmonic Mean Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (H = 3 / (1/a + 1/b + 1/c)) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
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