CALCULATOR
Quarter Circle Perimeter Calculator
Find curved arc plus both straight radii. Example: Radius: 2 m gives 7.14159265359 m. Includes two radii, not arc alone. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation.
Includes two radii, not arc alone. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Quarter circumference πr/2 plus 2r.
Accepted inputs: Radius: 0.001 to 1,000 m.
How the calculation works
P = (2+π/2)r
Worked example
With radius 2 m, curved arc plus both straight radii is 7.141592654 m.
Assumptions and limits
Includes two radii, not arc alone. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Quarter circumference πr/2 plus 2r.