Geometry & Measurement Calculators
Chord Distance Calculator
Find how far a chord sits from the centre of its circle.
Loading tool…
What is Chord Distance?
The perpendicular from a circle's centre to a chord always bisects it, so the distance, half-chord and radius form a right triangle.
How it works
We apply the Pythagorean relation d = √(r² − (c/2)²), rejecting chords longer than the diameter.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.