Geometry & Measurement Calculators
Chord Length Calculator
Find a circle's chord length from its radius and central angle or distance.
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What is Chord Length?
A chord is a straight line joining two points on a circle. Its length is 2r·sin(θ/2) from the central angle, or 2√(r²−d²) from the distance to the centre.
How it works
We apply the chord formula for whichever inputs you give — the central angle or the perpendicular distance — and report the chord, with the arc length and distance to the centre for context.
- 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.