Regular polygon area
Geometry / FREE CALCULATOR
Calculate area from perimeter and apothem of a regular polygon.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter number of sides. Use the unit shown beside the field.
- Enter side length. Use the unit shown beside the field.
- Enter apothem. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
Number of sides*Side length*Apothem/2
Worked example
Number of sides = 6; Side length = 4; Apothem = 3.4641. Result: 41.5692 square units.
Understand your result
Calculate area from perimeter and apothem of a regular polygon. The result is expressed in square units.
Assumptions and limitations
Side count must be a whole number; apothem is perpendicular from centre to a side. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Calculate area from perimeter and apothem of a regular polygon.
What should I check before using the answer?
Side count must be a whole number; apothem is perpendicular from centre to a side.
Related guides
Guides will appear here when published and linked by the editor.