Acreage Calculator
Calculate land area in acres instantly with our free acreage calculator. Enter dimensions in feet or meters to find acreage, or convert between square feet, hectares, and other area units. Perfect for real estate, farming, landscaping, and property planning. Supports rectangles, triangles, circles, and irregular shapes. Includes perimeter calculation for fencing and land value estimation. Key conversion: 1 acre = 43,560 square feet.
How to Calculate Acreage
Acreage measures land area where 1 acre = 43,560 square feet (or 4,046.86 m²). To calculate acres from dimensions, multiply length × width to get square feet, then divide by 43,560.
Or: Acres = Square Feet ÷ 43,560
📏 Size Comparison
💡 Common Lot Sizes (click to calculate)
💡 Quick Conversions (click to convert)
💡 Land Price Examples (click to calculate)
📋 Acre Conversion Reference Chart
Quick reference for common acre conversions and land measurements:
| Acres | Square Feet | Square Meters | Hectares | Square Yards |
|---|---|---|---|---|
| ¼ (0.25) | 10,890 | 1,011.71 | 0.101 | 1,210 |
| ⅓ (0.33) | 14,520 | 1,349.57 | 0.135 | 1,613 |
| ½ (0.5) | 21,780 | 2,023.43 | 0.202 | 2,420 |
| 1 | 43,560 | 4,046.86 | 0.405 | 4,840 |
| 2 | 87,120 | 8,093.71 | 0.809 | 9,680 |
| 5 | 217,800 | 20,234.28 | 2.023 | 24,200 |
| 10 | 435,600 | 40,468.56 | 4.047 | 48,400 |
| 40 | 1,742,400 | 161,874.26 | 16.187 | 193,600 |
| 100 | 4,356,000 | 404,685.64 | 40.469 | 484,000 |
| 640 | 27,878,400 | 2,589,988.11 | 259.00 | 3,097,600 |
Common Lot Sizes & Dimensions
| Lot Size | Square Feet | Dimensions (if square) | Perimeter | Typical Use |
|---|---|---|---|---|
| ⅛ acre | 5,445 sq ft | 73.8 × 73.8 ft | 295 ft | Urban lot |
| ¼ acre | 10,890 sq ft | 104.4 × 104.4 ft | 418 ft | Suburban lot |
| ⅓ acre | 14,520 sq ft | 120.5 × 120.5 ft | 482 ft | Average US home |
| ½ acre | 21,780 sq ft | 147.6 × 147.6 ft | 590 ft | Large suburban |
| 1 acre | 43,560 sq ft | 208.7 × 208.7 ft | 835 ft | Estate lot |
| 5 acres | 217,800 sq ft | 466.7 × 466.7 ft | 1,867 ft | Small farm |
| 10 acres | 435,600 sq ft | 660 × 660 ft | 2,640 ft | Hobby farm |
| 40 acres | 1,742,400 sq ft | 1,320 × 1,320 ft | 5,280 ft | Farm parcel |
📏 How Big is an Acre? Visual Comparisons
Football Field
1 acre is about 90% of an American football field (not including end zones). A full field with end zones is 1.32 acres.
Soccer Field
1 acre is roughly the size of a standard soccer field. A FIFA regulation field is about 1.76 acres.
Tennis Courts
1 acre equals about 16 tennis courts. Each singles court is approximately 2,808 sq ft.
Average Home Lots
1 acre fits about 3 average US home lots (⅓ acre each) or 4-5 smaller suburban lots.
Parking Spaces
1 acre can hold approximately 150-200 parking spaces depending on the layout.
Walking Distance
Walking around a square acre (perimeter: 835 ft) takes about 3-4 minutes at a normal pace.
Important: Acres Can Be Any Shape
An acre is a unit of area, not a specific shape or dimension. An acre can be:
• A rectangle: 660 ft × 66 ft (1 furlong × 1 chain - the original definition)
• A rectangle: 100 ft × 435.6 ft
• A circle with radius: 117.75 ft
• Any irregular shape totaling 43,560 square feet
Key point: When calculating acreage, focus on the total area (43,560 sq ft per acre), not specific dimensions.
🔍 People Also Ask: Acreage & Land Measurement
How many square feet are in an acre?
There are exactly 43,560 square feet in one acre. This is the standard conversion used in the United States, UK, and other countries using imperial measurements. To convert acres to square feet, multiply by 43,560.
How do I calculate acres from square feet?
Divide the square footage by 43,560. Formula: Acres = Square Feet ÷ 43,560. Example: 100,000 sq ft ÷ 43,560 = 2.30 acres.
How big is 1 acre visually?
1 acre is approximately 90% of an American football field (without end zones), about the size of a soccer field, or 16 tennis courts. If square, it measures 208.71 ft × 208.71 ft.
How do I calculate acreage from length and width?
Multiply length × width to get square feet, then divide by 43,560. Formula: Acres = (Length × Width) ÷ 43,560. Example: 300 ft × 400 ft = 120,000 sq ft ÷ 43,560 = 2.75 acres.
What is the difference between an acre and a hectare?
1 acre = 0.4047 hectares and 1 hectare = 2.471 acres. Hectares are used in the metric system (most of the world), while acres are primarily used in the US, UK, and former British colonies.
How many acres is a typical house lot?
The average US home sits on about ⅓ acre (0.33 acres or 14,520 sq ft). Urban lots may be ⅛ acre, while suburban lots typically range from ¼ to ½ acre. Rural homes often have 1+ acres.
How do I measure irregular shaped land?
Break it into regular shapes (rectangles, triangles), calculate each area separately, add them together, then divide by 43,560 for acres. For complex shapes, use GPS mapping tools or hire a surveyor.
How much fencing do I need for 1 acre?
For a square acre, you need about 835 linear feet of fencing. For a rectangular acre (e.g., 660 ft × 66 ft), you'd need 1,452 ft. The shape significantly affects perimeter length.
How many acres in a square mile?
There are 640 acres in 1 square mile. This relationship dates back to the Public Land Survey System used in the United States. A square mile equals 27,878,400 square feet.
What is a half acre in feet?
A half acre equals 21,780 square feet. If square, it would measure approximately 147.6 ft × 147.6 ft with a perimeter of 590 ft.
How do I convert meters to acres?
First convert square meters to square feet (multiply by 10.7639), then divide by 43,560. Or divide square meters by 4,046.86 directly. 1 acre = 4,046.86 m².
What is the origin of an acre?
The acre originated in medieval England as the area a yoke of oxen could plow in one day. It was standardized as 1 chain × 1 furlong (66 ft × 660 ft = 43,560 sq ft).
🌍 Common Uses for Acreage Calculations
Real Estate
Determine lot sizes for property listings, compare land values, calculate price per acre, and assess property boundaries for buying or selling land.
Farming & Agriculture
Plan crop rotations, calculate seed and fertilizer needs, determine grazing capacity, and manage irrigation systems based on field acreage.
Construction & Development
Plan building sites, calculate material needs, determine zoning compliance, and estimate project costs based on land area.
Landscaping
Calculate lawn care needs, estimate sod or seed quantities, plan garden layouts, and determine irrigation requirements.
Fencing & Boundaries
Calculate linear feet of fencing needed, estimate fencing costs, and plan property boundaries for livestock or privacy.
Land Surveying
Verify property boundaries, calculate parcel sizes for legal documents, and ensure accurate land records for taxes and deeds.
📚 Complete Guide: How to Calculate Acreage
Method 1: From Length and Width (Rectangular Land)
The simplest method for rectangular or square parcels of land.
Or in meters: Acres = (Length in m × Width in m) ÷ 4,046.86
✓ Example: Calculate Acreage of a Residential Lot
A lot measures 150 feet by 200 feet.
Step 1: Calculate area: 150 × 200 = 30,000 sq ft
Step 2: Convert to acres: 30,000 ÷ 43,560 = 0.689 acres
Step 3: Calculate perimeter: 2 × (150 + 200) = 700 linear feet
Method 2: Convert Square Feet to Acres
When you already know the area in square feet from a survey or deed.
Reverse: Square Feet = Acres × 43,560
✓ Example: Convert Survey Results
A property survey shows 87,120 square feet.
Calculation: 87,120 ÷ 43,560 = 2.0 acres exactly
Method 3: Triangular Land
For triangular parcels, use the triangle area formula first.
Where: Base and Height are in feet
✓ Example: Triangular Corner Lot
A triangular lot has a base of 400 feet and height of 300 feet.
Step 1: Triangle area = 0.5 × 400 × 300 = 60,000 sq ft
Step 2: Convert to acres: 60,000 ÷ 43,560 = 1.38 acres
Method 4: Circular Land
For circular parcels or when you know the radius.
Or: Acres = (π × (diameter/2)²) ÷ 43,560
✓ Example: Circular Pond Area
A circular area has a radius of 200 feet.
Step 1: Circle area = π × 200² = 125,663.7 sq ft
Step 2: Convert to acres: 125,663.7 ÷ 43,560 = 2.89 acres
Method 5: Irregular Shapes
For complex shapes, break them into simpler geometric shapes.
✓ Example: L-Shaped Property
An L-shaped lot can be divided into two rectangles: 100×200 ft and 150×100 ft.
Rectangle 1: 100 × 200 = 20,000 sq ft
Rectangle 2: 150 × 100 = 15,000 sq ft
Total: 20,000 + 15,000 = 35,000 sq ft
Acres: 35,000 ÷ 43,560 = 0.80 acres
🔢 Key Acre Conversion Factors
1 Acre Equals
- 43,560 square feet
- 4,840 square yards
- 4,046.86 square meters
- 0.4047 hectares
- 0.0015625 square miles
- 1/640 of a square mile
1 Hectare Equals
- 2.471 acres
- 10,000 square meters
- 107,639 square feet
- 11,959.9 square yards
- 0.01 square kilometers
1 Square Mile Equals
- 640 acres
- 27,878,400 square feet
- 258.999 hectares
- 2.59 square kilometers
- 3,097,600 square yards
❓ Frequently Asked Questions
There are exactly 43,560 square feet in one acre. This is the standard conversion used in the United States and other countries that use imperial measurements. This number comes from the original definition: 1 chain (66 ft) × 1 furlong (660 ft) = 43,560 sq ft.
Multiply length × width to get square feet, then divide by 43,560. For example: A 200 ft × 400 ft lot = 80,000 sq ft ÷ 43,560 = 1.84 acres. Our calculator does this automatically for any dimensions you enter.
An acre is a specific unit of measurement (43,560 sq ft), while a lot refers to a parcel of land that can be any size. Lots are typically measured in fractions of acres (¼ acre, ½ acre) or in square feet. The average US residential lot is about ⅓ acre.
Multiply hectares by 2.471 to get acres. For example: 5 hectares × 2.471 = 12.355 acres. Conversely, multiply acres by 0.4047 to get hectares. Our area converter handles this automatically.
Half an acre equals 21,780 square feet. If it were square, it would measure about 147.6 ft × 147.6 ft. That's roughly 45% of a football field or about 1.5 average home lots.
You have several options: 1) Check your property deed or tax records, 2) Use our calculator with dimensions from a survey, 3) Use Google Maps or GPS tools to trace boundaries, or 4) Hire a professional surveyor for accurate legal measurements.
A square acre requires about 835 linear feet of fencing. At typical costs of $10-30 per linear foot (installed), expect to pay $8,350-$25,050 for chain link, wood, or basic wire fencing. Vinyl or ornamental fencing costs significantly more.
This calculator provides accurate mathematical conversions, but for legal purposes (property sales, boundary disputes, tax assessments), you should always rely on a professional land survey. Surveyors use specialized equipment to provide legally recognized measurements.
This calculator and content has been reviewed by our team of real estate professionals and land surveyors for accuracy.
Last reviewed and updated: February 15, 2026
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