Heptagon Area Calculator

In this heptagon area calculator, you will learn a lot of things like:

• How to find the area of a heptagon;
• How to derive the heptagon area formula; and
• How to use this heptagon area calculator.

Heptagon (or septagon) is a seven-sided polygon, and despite being very rarely used in design due to its odd number of sides, we're here to discuss how to calculate its area. Ready to learn? Then keep on reading. 🙂

Finding the area of a heptagon is very easy. All we have to do is utilize the regular polygon area formula presented below:

Where:

• $A$ is the area of a regular polygon;
• $n$ is the number of sides of the regular polygon; and
• $a$ is the length of the regular polygon's side.

Substituting $7$ for $n$, we now have the heptagon area formula:

If you don't have a scientific calculator to enter trigonometric functions like the tangent function in our equation, you can use this simplified heptagon area formula:

As an example heptagon area calculation, let's consider a septagon with a side $6\ \text{cm}$ in length. Using our heptagon area formula, we get:

Our heptagon area calculator is straightforward and intuitive. To use our tool, you only have to:

• Input at least one of any of the following measurements of your heptagon:
  • Side (a);
  • Perimeter (equal to $7\times a$);
  • Circumcircle radius (R) (equal to $\frac{a}{2 \times \sin(\frac{180\degree}{7})}$); or
  • Incircle radius or apothem (r) (equal to $\frac{a}{2\times\tan(\frac{180\degree}{7})}$).

Here are some of our related tools you can check out:

• Polygon calculator
• Dodecagon area calculator
• Dodecagon calculator
• Heptagon calculator
• Decagon area calculator
• Decagon calculator
• Polygon angle calculator

To find the area of a heptagon:

1. Take the measurement of its side. Say we have a heptagon with a side that measures 4 cm.
2. Square that measurement to obtain: 4 cm × 4 cm = 16 cm².
3. Multiply that square by 1.75/tan(180°/7) or 3.633912444 to find the heptagon area of 16 cm² × 3.633912444 = 58.1425991 cm² ≈ 58.14 cm².

The area of a heptagon with a side that measures 2 feet is around 14.536 ft². Using the heptagon area formula:
heptagon area = 3.633912444 × side².
= 3.633912444 × (2 ft)²
= 3.633912444 × 4 ft²
= 14.53564978 ft²
≈ 14.536 ft²