Acreage Calculator
Use this free acreage calculator to quickly determine the size of land in acres. Enter dimensions like length and width to get accurate results, making it easy to measure plots, farms, yards, and real estate properties for planning and development.
1 acre = 43,560 sq ft = 4,840 sq yd = 0.4047 hectares = 208.71 × 208.71 ft (if square)
1 acre = 43,560 sq ft · A square acre ≈ 208.7 × 208.7 ft · 640 acres = 1 square mile · Standard suburban lot ≈ ¼ acre · For legal purposes use your recorded deed acreage
Understanding the Calculator Inputs
This acreage calculator converts any length and width measurement into acres — the standard US unit of land area. Enter dimensions in feet, yards, meters, miles, or surveying chains, select your lot shape, and get instant results in acres, square feet, square yards, hectares, and square miles simultaneously.
Input Units
- Feet — the most common input for residential lots measured by tape or from plat maps.
- Yards — sometimes used in older survey descriptions and football field comparisons.
- Meters — used for properties listed in Canada, UK, Australia, or when using a metric GPS device.
- Miles — for large agricultural parcels described in miles (e.g., ½ mile × ¼ mile = 80 acres).
- Chains — the surveying unit used in US land records (1 chain = 66 feet). Many rural deeds describe parcels in chains. A 10-chain × 10-chain parcel = 10 acres.
Lot Shape
- Rectangle / Square — standard shape for most urban and suburban lots. Area = Length × Width.
- Right Triangle — corner lots or wedge-shaped parcels. Area = ½ × Length × Width.
- Circle — circular lots or round features. Enter the diameter as Length. Area = π × (diameter÷2)².
Most real-world lots are not perfect rectangles. For L-shaped, irregular, or multi-sided parcels, divide the area into 2–3 rectangles or triangles, calculate each section separately using this calculator, and add the results. For very irregular parcels with many sides, use your county's online GIS parcel viewer — it shows the calculated acreage of every parcel in your jurisdiction.
Real-World Acreage Examples
Example 1 — Standard Suburban Lot (Feet)
75 × 145 = 10,875 sq ft
10,875 ÷ 43,560 = 0.2496 acres ≈ ¼ acre
Context: typical suburban residential lot — house + front yard + backyard
Example 2 — Rural Parcel (Miles)
0.5 × 0.25 = 0.125 sq mi × 640 = 80 acres
Or in feet: 2,640 ft × 1,320 ft = 3,484,800 sq ft ÷ 43,560 = 80 acres
Context: medium farm field — typical for row crop production in the Midwest
Example 3 — Survey Chain Description (Chains)
10 chains × 66 ft/chain = 660 ft; 16 chains × 66 ft = 1,056 ft
660 × 1,056 = 696,960 sq ft ÷ 43,560 = 16 acres
Tip: enter 10 and 16 directly with "Chains" selected — the calculator converts automatically
Example 4 — Hectares to Acres (Metric Conversion)
3.5 × 2.4711 = 8.65 acres
8.65 × 43,560 = 376,794 sq ft
Tip: enter dimensions in meters using the Meters unit option for direct conversion
Example 5 — Triangular Corner Lot
Area = ½ × 200 × 180 = 18,000 sq ft
18,000 ÷ 43,560 = 0.413 acres
Select "Right Triangle" shape in the calculator above
Example 6 — Circular Lot or Pond
Radius = 150 ft · Area = π × 150² = 70,686 sq ft
70,686 ÷ 43,560 = 1.623 acres
Enter 300 as Length and select "Circle" shape
Acreage Reference Guide
Acreage is difficult to visualize without reference points. Here are familiar comparisons to help put land sizes in perspective.
| Acreage | Sq Ft | Dimensions (if square) | Real-World Comparison |
|---|---|---|---|
| 0.05 acre | 2,178 sq ft | 46.7 × 46.7 ft | Urban row home lot — city townhouse |
| 0.10 acre | 4,356 sq ft | 66 × 66 ft | Typical urban detached lot |
| 0.25 acre | 10,890 sq ft | 104 × 104 ft | Standard quarter-acre suburban lot |
| 0.50 acre | 21,780 sq ft | 147 × 147 ft | Half-acre — large yard, room for outbuilding |
| 1 acre | 43,560 sq ft | 208.7 × 208.7 ft | Football field minus end zones; 16 tennis courts |
| 2 acres | 87,120 sq ft | 295 × 295 ft | Small hobby farm or estate lot |
| 5 acres | 217,800 sq ft | 467 × 467 ft | Small farm parcel; large rural homestead |
| 10 acres | 435,600 sq ft | 660 × 660 ft | ¼ mile × ¼ mile; medium farm parcel |
| 40 acres | 1,742,400 sq ft | 1,320 × 1,320 ft | USGS quarter-quarter section; ½ mi × ½ mi |
| 160 acres | 6,969,600 sq ft | 2,640 × 2,640 ft | PLSS quarter section; "homestead act" parcel |
| 640 acres | 27,878,400 sq ft | 1 mile × 1 mile | 1 square mile = 1 PLSS section |
The quarter-acre lot (10,890 sq ft, typically 75 ft wide × 145 ft deep for a rectangular suburban lot) has been the standard US suburban lot size since the post-WWII housing boom. Most established suburban zoning codes are built around this lot size for setbacks, coverage limits, and accessory structure rules. Lots under 0.15 acres are common in urban and newer density-zoned areas; lots over 0.5 acres are typical in rural and semi-rural residential zones.
Acreage Unit Conversion Table
Complete conversion reference for all common land area units used in the US and internationally.
| From | To | Multiply By | Example |
|---|---|---|---|
| Square Feet → Acres | Acres | ÷ 43,560 | 87,120 sq ft ÷ 43,560 = 2.0 acres |
| Square Yards → Acres | Acres | ÷ 4,840 | 9,680 sq yd ÷ 4,840 = 2.0 acres |
| Square Meters → Acres | Acres | ÷ 4,046.86 | 8,093.7 sq m ÷ 4,046.86 = 2.0 acres |
| Hectares → Acres | Acres | × 2.4711 | 1 hectare × 2.4711 = 2.47 acres |
| Square Miles → Acres | Acres | × 640 | 0.5 sq mi × 640 = 320 acres |
| Acres → Square Feet | Sq ft | × 43,560 | 2.5 acres × 43,560 = 108,900 sq ft |
| Acres → Hectares | Hectares | × 0.4047 | 5 acres × 0.4047 = 2.024 ha |
| Acres → Square Miles | Sq mi | ÷ 640 | 320 acres ÷ 640 = 0.5 sq mi |
| Chains² → Acres | Acres | ÷ 10 | 10 × 10 chains = 100 chain² ÷ 10 = 10 acres |
Common Uses for Acreage Calculation
Acreage calculation comes up in a wide range of real estate, agricultural, and construction contexts. Here's how different users typically need this information.
Real Estate and Land Purchase
When evaluating vacant land for purchase, acreage directly affects price — most rural land is listed and sold at $/acre. Understanding exact acreage helps compare listings, evaluate price per acre, and confirm that the deed description matches the listed size. Always verify the recorded deed acreage with your county assessor before closing — discrepancies between listed and recorded acreage are common and can affect financing.
Fencing and Perimeter Planning
Knowing your acreage and lot shape lets you estimate fence perimeter and cost. A 1-acre square lot has a perimeter of approximately 835 ft (208.7 × 4). A 5-acre square lot has a perimeter of 1,869 ft. Use our Fence Cost Calculator once you have your perimeter measurement.
Landscaping and Material Estimation
Landscaping cost estimators and material calculators typically use square footage. Convert your acreage to square feet (multiply by 43,560) then use our Landscaping Cost Calculator, Topsoil Calculator, or Sod Calculator for material estimates.
Agricultural Planning
Crop yield projections, seed and fertilizer calculations, irrigation system sizing, and equipment rental are all calculated per acre. Knowing your exact field acreage is the starting point for any agricultural budget. The USDA Farm Service Agency also uses acreage for program eligibility and payment calculations — accurate acreage from a licensed surveyor is typically required for these purposes.
Zoning and Permit Applications
Many zoning codes specify requirements in terms of acreage — minimum lot sizes for certain uses, maximum impervious surface coverage as a percentage of lot area, and setback calculations that reference lot dimensions. Understanding your lot's acreage and dimensions is essential for any permit application or zoning variance request.
Land Size Guide by Use Type
How much land you need depends entirely on intended use. Here are general guidelines for common rural and agricultural uses — always verify specific requirements with local zoning and agricultural extension offices.
| Use | Minimum Acreage | Ideal Acreage | Notes |
|---|---|---|---|
| Urban residential lot | 0.05–0.10 acre | 0.10–0.25 acre | Set by local zoning minimum lot size |
| Suburban residential lot | 0.15–0.25 acre | 0.25–0.50 acre | Quarter-acre is suburban standard |
| Rural residential / hobby farm | 1–2 acres | 2–5 acres | Enough for large garden, small outbuildings |
| 1 horse (with pasture) | 1.5–2 acres | 2–3 acres | Includes dry lot + rotational pasture |
| Small backyard homestead | 1 acre | 2–5 acres | Chickens, garden, orchard, small livestock |
| Market garden (CSA scale) | 1 acre | 2–5 acres | Intensive vegetable production for local market |
| Small farm (mixed) | 5 acres | 10–40 acres | Viable diversified small farm operation |
| Row crop farm (grain) | 40 acres | 160–640+ acres | Minimum viable for most grain equipment economics |
| Hunting / recreational land | 5–10 acres | 40–160 acres | Wildlife management needs significant size |
How to Find Your Property's Acreage
You don't always need to measure — your property's acreage is already recorded in multiple public sources. Here's where to find it.
1. Your Property Deed
The legal description in your deed typically states the lot dimensions and total acreage. Deeds are recorded with your county clerk or recorder of deeds and are public record. You can find a copy in your closing documents or request one from the county recorder's office (often available online for free or a small fee).
2. County Assessor's Website
Most US county assessors maintain a searchable online database of all parcels in the county — searchable by address, owner name, or parcel ID number. The assessor's record typically includes the recorded lot size in acres, lot dimensions, and assessed value. Search "[your county name] assessor parcel search" to find it. This is the fastest free source for any US property's acreage.
3. County GIS Parcel Viewer
Most counties maintain a GIS (Geographic Information System) parcel viewer that shows property boundaries on a map with acreage, dimensions, and zoning information. Search "[your county] GIS parcel viewer" or "[your county] property map." These tools are free and often show far more detail than the assessor's database — including lot shape, irregular boundaries, and neighboring parcels.
4. Property Tax Bill
Your annual property tax bill typically includes the recorded lot size in acres or square feet alongside the assessed value. This is the simplest source for homeowners who already own the property.
5. Licensed Land Surveyor
For legal purposes — property disputes, boundary questions, permit applications, or land transactions — only a survey conducted by a licensed land surveyor provides legally defensible acreage. Survey costs vary from $500–$2,500 for a simple residential boundary survey to $3,000–$10,000+ for large or complex agricultural parcels. The PLSS (Public Land Survey System) is the legal reference framework for all US land descriptions west of Ohio.
Many older deeds — especially in the Eastern US — use "metes and bounds" descriptions instead of simple dimensions: "Beginning at an iron pin, thence North 42° East 330 feet..." These descriptions trace the property boundary using compass bearings and distances from a starting point. Converting a metes and bounds description to acreage requires adding up all the boundary segments — which is why a GIS parcel viewer or licensed surveyor is far more reliable than hand-calculating from an old deed.
How We Calculate
Step 1: Convert input dimensions to feet using the selected unit multiplier: Yards × 3, Meters × 3.28084, Miles × 5,280, Chains × 66.
Step 2: Calculate area in square feet based on shape: Rectangle = L × W; Right Triangle = 0.5 × L × W; Circle = π × (L÷2)².
Step 3: Convert square feet to all output units: Acres = sq ft ÷ 43,560; Square Yards = sq ft ÷ 9; Hectares = sq ft ÷ 10,763.91; Square Miles = sq ft ÷ 27,878,400.
All conversions use exact legal definitions: 1 acre = 43,560 sq ft (exact, by statute); 1 chain = 66 feet (exact, Gunter's chain); 1 hectare = 10,000 sq m (exact, metric definition).