Construction
How to Calculate Area: Formulas for All Geometric Shapes
Just ask and get Editorial Team(Geometry & Construction)
Updated 2026-09-19
6 min read
Key Takeaway:Calculate square footage and square meters for home renovation projects, land lots, and carpentry.
Basic Two-Dimensional Area
- **Rectangle / Square**: $\text{Area} = \text{Length} \times \text{Width}$
- **Triangle**: $\text{Area} = \frac{1}{2} \times \text{Base} \times \text{Height}$
- **Circle**: $\text{Area} = \pi r^2$
Frequently Asked Questions
How do you calculate area of an irregular room?
Divide the space into smaller standard rectangles and triangles, calculate each section’s area, and sum them together.