Area Calculator
Compute the area of common two-dimensional shapes — rectangle, triangle, circle, trapezoid and parallelogram.
Example values are shown — change any of them and the answer updates live.
m
m
Area
15 m²
Formula: l × w with the values you entered.
Perimeter16 m
Converted161.5 ft²
Formula usedl × w
Exact shape formulas — no approximations except for the circle's π.
Compare scenarios
Your inputs
15 m²
l × w
Base ×2
30 m²
×2
Doubling one side changes the area to .
30 m²
Formula used
Step 1 · Area
l × w
Your inputs
15 m²
Exact arithmetic — computed instantly in your browser.