Circle section properties
Solid circle about a diameter.
Method
A = πd²/4, I = πd⁴/64, Z = πd³/32. Worked case: 100 mm gives A 7,854 mm², I 4.91×10⁶ mm⁴, Z 98,175 mm³.
Logic: how this figure is built.
Last checked 2 October 2026. See the disclaimer.
Solid circle about a diameter.
A = πd²/4, I = πd⁴/64, Z = πd³/32. Worked case: 100 mm gives A 7,854 mm², I 4.91×10⁶ mm⁴, Z 98,175 mm³.
Logic: how this figure is built.
Last checked 2 October 2026. See the disclaimer.