Regular Pentagon Calculator
Result
Calculated result
43.0119350147
Based on the values entered.
↗ Math
Regular Pentagon Calculator — free online calculator.
Formula
sqrt(25+10*sqrt(5))/4*s^2
- Regular Pentagon Calculator calculates its result from Side length. It uses the formula sqrt(25+10*sqrt(5))/4*s^2. Change any input to recalculate the result instantly.
- The main inputs are Side length. Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Regular Pentagon
Inputs
- Side length: 5
Using Side length = 5, the calculated result is 43.0119350147.
Sample result: Calculating…
Frequently asked questions
What does the Regular Pentagon calculate?
Regular Pentagon Calculator — free online calculator.
Which values should I enter?
Enter Side length using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: sqrt(25+10*sqrt(5))/4*s^2.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.