Area Calculator

Calculate the area of any shape including rectangles, squares, circles, triangle...

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LengthWidthL x W
ft
ft
Area Formulas Reference
Rectangle
A = length x width
Circle
A = π x r²
Triangle
A = ½ x base x height
Trapezoid
A = ½(b₁ + b₂) x height
Parallelogram
A = base x height
Ellipse
A = π x a x b

6 Shapes

Circle, rectangle, triangle, trapezoid, ellipse, parallelogram

7 Unit Conversions

Instant conversion to sq ft, sq m, acres, hectares and more

Real-Time Results

See area update as you type dimensions

Calculation History

Last 5 calculations saved locally for quick reference

Area Calculator Features

Calculate area of any shape

6 shape types
Multiple units
Instant calculation
Unit conversions
Acres & hectares
No signup needed
Mobile-friendly
Free unlimited use
Accurate formulas
Educational tool
Construction ready
Print results

Why Use Area Calculator?

Multiple Shapes

Calculate area for rectangles, circles, triangles, trapezoids, parallelograms, and ellipses. All common shapes covered.

Unit Conversions

Enter measurements in any unit and get results in square feet, square meters, acres, hectares, and more.

Instant Results

Get accurate area calculations instantly. No complex formulas to remember - just enter your dimensions.

Real-World Applications

Perfect for room measurements, land plots, flooring, painting, landscaping, and construction projects.

Common Use Cases

Area calculations for every need

Home Renovation

Calculate room area for flooring, carpeting, or painting. Know exactly how much material you need to buy.

Land Measurement

Calculate plot sizes for real estate, farming, or landscaping projects. Convert between acres and square feet easily.

Construction Projects

Estimate material quantities for construction - concrete, roofing, siding, and more based on accurate area calculations.

Math & Education

Students can verify geometry homework and learn area formulas. Teachers can demonstrate concepts with instant calculations.

How It Works

1

Select Shape

Choose the shape you want to calculate - rectangle, circle, triangle, or other geometric shapes.

2

Enter Dimensions

Input the required measurements (length, width, radius, etc.) for your selected shape.

3

Choose Unit

Select your measurement unit - feet, meters, inches, centimeters, or yards.

4

Get Area Results

Click 'Calculate Area' to see results in multiple units including sq ft, sq m, acres, and hectares.

Pro Tips for Area Calculation

Measure Twice

Always double-check your measurements before calculating. Small measurement errors can lead to significant area miscalculations.

Add for Waste

When buying materials (flooring, paint, fabric), add 10-15% extra to your calculated area for waste, cuts, and mistakes.

Break Down Complex Shapes

For L-shaped or irregular rooms, divide into rectangles, calculate each separately, then add the areas together.

Document Measurements

Take photos or make sketches with dimensions. This helps when you need to recalculate or purchase additional materials.

Frequently Asked Questions

For a rectangle, multiply length × width. For example, a room 12 feet long and 10 feet wide has an area of 120 square feet.
Use the formula π × r² (pi times radius squared). For a circle with radius 5 feet, the area is 3.14159 × 25 = 78.54 square feet.
Use the formula (base × height) ÷ 2. For a triangle with base 10 feet and height 8 feet, the area is (10 × 8) ÷ 2 = 40 square feet.
One acre equals 43,560 square feet. To convert square feet to acres, divide by 43,560.
One hectare equals 10,000 square meters. To convert square meters to hectares, divide by 10,000.
For irregular shapes, break them into regular shapes (rectangles, triangles), calculate each area separately, then add them together.
Feet measures length (one dimension). Square feet measures area (two dimensions). A 10×10 foot room is 100 square feet.
Measure the room's length and width in feet, multiply them together for square footage. Add 10% extra for waste and cuts.
Calculate wall area (height × width for each wall), subtract doors and windows, then divide by paint coverage (typically 350-400 sq ft per gallon).
Yes, our calculator uses standard mathematical formulas and provides results to several decimal places for precision.

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