How accurate are the area calculations?

Our calculator uses standard mathematical formulas to ensure high accuracy. Results are typically accurate to the precision of your input values. For critical measurements, we recommend verifying results using alternative methods. For measurement standards, visit NIST Weights and Measures .

Can I calculate the area of irregular shapes?

Our calculator supports seven common geometric shapes. For irregular shapes, you can break them down into simpler shapes (like rectangles and triangles) and calculate each part separately, then add the results together.

What units are supported?

Our calculator supports various units including feet, meters, inches, yards, miles, kilometers, and centimeters. Make sure to use consistent units throughout your calculation for accurate results.

How do I convert between different area units?

To convert between area units, you can use our calculator with different unit selections, or use conversion factors. For example, 1 square meter = 10.764 square feet, and 1 acre = 43,560 square feet.

What's the difference between area and perimeter?

Area measures the space inside a shape (in square units), while perimeter measures the distance around the outside of a shape (in linear units). Our calculator focuses on area calculations.

Can I use this for land measurement?

Yes, our area calculator is especially useful for estimating land area. You can use it to calculate the area of rectangular plots, circular areas, or break down irregular land into simpler shapes for measurement.

How do I calculate the area of a triangle with only side lengths?

Our calculator uses Heron's formula, which calculates the area of a triangle using only the three side lengths. The formula is: Area = √[s(s-a)(s-b)(s-c)] where s is the semi-perimeter (a+b+c)/2.

What's the formula for calculating sector area?

The area of a sector is calculated as: Area = (θ/360°) × π × r², where θ is the central angle in degrees and r is the radius. This gives you the area of the "pie slice" portion of a circle.

How do I calculate the area of an ellipse?

The area of an ellipse is calculated using the formula: Area = π × a × b, where a is the semi-major axis and b is the semi-minor axis. This is similar to the circle formula but uses two different radii.

What's the difference between a trapezoid and a parallelogram?

A trapezoid has at least one pair of parallel sides, while a parallelogram has two pairs of parallel sides. The area formulas are different: trapezoid uses (base1 + base2) × height / 2, while parallelogram uses base × height.

📐 Area Calculator

Calculate the area of seven common shapes: rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram. Perfect for geometry, construction, and land measurement.

Last updated: 2025-10-21 — Compiled and reviewed by Calvin (Math Research, FreeCalculators.app)

Rectangle

A quadrilateral with four right angles

Visualization

Formula

Area = Length × Width

Select Unit

Input Values

Length (m)

Width (m)

Triangle

A three-sided polygon

Visualization

Formula

Area = √[s(s-a)(s-b)(s-c)] where s = (a+b+c)/2

🔺 Advanced Calculator

Need more triangle area calculation methods? Try our comprehensive triangle area calculator with 6 different calculation methods including base-height, two sides and angle, coordinates, and more.

Advanced Triangle Area Calculator

Select Unit

Input Values

Side A (m)

Side B (m)

Side C (m)

Trapezoid

A quadrilateral with one pair of parallel sides

Visualization

Formula

Area = (Base1 + Base2) × Height / 2

Select Unit

Input Values

Base 1 (m)

Base 2 (m)

Height (m)

Circle

A round shape where all points are equidistant from the center

Visualization

Formula

Area = π × Radius²

Select Unit

Input Values

Radius (m)

Sector

A portion of a circle bounded by two radii and an arc

Visualization

Formula

Area = (θ/360°) × π × Radius²

Select Unit

Input Values

Radius (m)

Angle (degrees) (m)

Ellipse

An oval shape with two focal points

Visualization

Formula

Area = π × Semi-major Axis × Semi-minor Axis

Select Unit

Input Values

Semi-major Axis (m)

Semi-minor Axis (m)

Parallelogram

A quadrilateral with opposite sides parallel

Visualization

Formula

Area = Base × Height

Select Unit

Input Values

Base (m)

Height (m)

Our area calculator provides accurate calculations for seven common geometric shapes. Whether you're working on geometry homework, planning construction projects, or estimating land area, our calculator makes it easy to find the area of rectangles, triangles, trapezoids, circles, sectors, ellipses, and parallelograms. Simply enter the required dimensions and get instant results with step-by-step explanations.

Key Features

Discover the powerful features that make our area calculator indispensable for geometry and construction.

✓Calculate area for 7 common geometric shapes

✓Support for multiple units (feet, meters, inches, etc.)

✓Step-by-step calculation explanations

✓Accurate results using proven mathematical formulas

✓User-friendly interface for all skill levels

✓Mobile-responsive design for calculations anywhere

✓No registration required - free and accessible

✓Privacy-focused with no data collection

Supported Shapes

Our calculator supports seven common geometric shapes with their respective formulas.

Rectangle

A quadrilateral with four right angles. The area is calculated by multiplying length and width.

Area = Length × Width

Triangle

A three-sided polygon. Area calculated using Heron's formula with three side lengths.

Area = √[s(s-a)(s-b)(s-c)] where s = (a+b+c)/2

Trapezoid

A quadrilateral with at least one pair of parallel sides.

Area = (Base1 + Base2) × Height / 2

Circle

A perfectly round shape where all points are equidistant from the center.

Area = π × Radius²

Sector

A portion of a circle enclosed by two radii and an arc.

Area = (θ/360°) × π × Radius²

Ellipse

An oval shape with two focal points, like a stretched circle.

Area = π × Semi-major axis × Semi-minor axis

Parallelogram

A quadrilateral with opposite sides parallel and equal in length.

Area = Base × Height

How to Use the Area Calculator

Follow these simple steps to calculate the area of any supported shape.

1. Select the Shape

Choose the geometric shape you want to calculate from the dropdown menu. Each shape has specific input requirements.

2. Enter Dimensions

Input the required measurements for your selected shape. Make sure to use consistent units throughout your calculation.

3. Choose Units

Select your preferred unit of measurement from the available options (feet, meters, inches, etc.).

4. Calculate Area

Click the "Calculate" button to get your result. The calculator will display the area in your chosen units.

5. View Results

Review the calculated area and any additional information provided, such as the formula used.

Area Calculation Tips

Helpful tips to improve your area calculations and make the most of our calculator.

1.Always use consistent units throughout your calculation

2.Double-check your measurements before entering them

3.For irregular shapes, break them down into simpler shapes

4.Remember that area is always expressed in square units

5.Use the appropriate formula for your specific shape

6.Round results appropriately based on your precision needs

7.Verify results using alternative methods when possible

8.Keep track of units to avoid calculation errors

9.For complex shapes, consider using multiple calculations

10.Practice with simple shapes before tackling complex ones

Frequently Asked Questions

Common questions about area calculations and our calculator.

Related Calculators

View all calculators →

🔢

Basic Calculator

Perform essential math operations for daily calculations. Perfect for homework, budgeting, and quick calculations.

Try it now

📊

Percentage Calculator

Free percentage calculator. Quickly find percentage increase, decrease, change, or what percent of a number another number is. Easy & accurate.

Try it now

🎓

Grade Calculator

Calculate your GPA and course grades with weighted assignments. Track academic performance and plan study strategies.

Try it now