Rectangle area
Geometry
How to calculate arc length
This tool calculates arc length from Radius, Angle (degrees). Enter each quantity in its labelled field, then use the formula below to check the calculation.
Formula
radius × angle × π ÷ 180
Worked example
- Radius
- 5
- Angle (degrees)
- 90
Applying the formula to these values gives 7.85398163397 units.
What should I check?
Find the area, perimeter, surface area or volume of common shapes. Use consistent length units: metres produce square metres for areas and cubic metres for volumes.
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