Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Regular polygon of straight panels, not a circle of curved fencing. Gates and connection gaps excluded.
Example Calculation
- Equal straight panels: 12
- Panel length: 3 m
Equal straight panels = 12; Panel length = 3 m. Primary result: 11.5911099155.
Frequently asked questions
How do I use this calculator?
Enter equal straight panels, panel length. The result updates automatically. Use Reset to restore the example values.
What method does it use?
circumradius=panel/(2 sin(π/n)); polygon area=n panel²/(4 tan(π/n)).. Regular polygon of straight panels, not a circle of curved fencing. Gates and connection gaps excluded.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.