Acres to Hectares Converter
Instantly convert acres to hectares, square meters, square feet, square kilometers, square miles, and more — with live precision control, quick presets for common lot sizes, composite acres & ft² display, and a downloadable PDF report.
Uses the exact factors 1 acre = 0.40468564224 ha (1 acre = 4,046.8564224 m²), 1 acre = 43,560 ft², and 1 ha = 10,000 m² — for reference only.
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Acres to Hectares Conversion — Complete Guide for 2026
Converting acres to hectares (ha) is essential whenever US land figures meet metric ones. American property listings, deeds, and farm records measure land in acres, while most of the world — including international real estate markets, agricultural statistics, and environmental reports — uses hectares. The key relationship is exact: 1 acre = 0.40468564224 hectares, so 1 hectare ≈ 2.47105 acres.
Our free Acres to Hectares Converter takes a value in acres and returns hectares at 0 to 8 decimal places, splits fractional values into acres and square feet (2.5 acres becomes 2 acres 21,780 ft²), and converts across the land-area ladder — square meters, square feet, square yards, square kilometers, square miles, and ares. Quick presets, a log-scale comparison chart, a common-parcels reference table, and a downloadable PDF report make it useful for a quick check or for listing, appraisal, and planning paperwork.
How to Use the Acres to Hectares Converter in 4 Steps
A complete acre-to-hectare conversion takes a few seconds. Enter an acreage or tap a preset, choose your precision, and download a PDF report you can attach to a listing, offer, or land file.
Enter Your Area in Acres
Type any value in acres — whole numbers or decimals such as 0.25 or 2.5. The calculator handles everything from a small city lot to thousands of acres of ranch land with the same exact math, and updates the result on every keystroke.
Or Tap a Quick Preset
Common lot and parcel sizes are one tap away: 0.25, 0.5, 1, 2.5, 5, and 10 acres. Each chip shows its hectare value, so you can read the answer before you click. The active preset stays highlighted, and typing a matching value re-selects it automatically.
Set Decimal Precision
Use the input or slider to pick 0 to 8 decimal places for the hectare result (the default is 5). Two decimals suit listings and quick comparisons; four or more suit surveys, deeds, and appraisal records. Square meters, square feet, and other units use fixed, sensible precision.
Review & Download PDF
See your land in hectares, square meters, acres-and-square-feet, square feet, square yards, square kilometers, square miles, and ares, plus a chart comparing the numbers. Click Download PDF for a two-page branded report with every conversion, the chart, and a highlighted reference table.
Why 1 Acre = 0.40468564224 Hectares
The acre is an old English unit of land. It was originally the area a team of oxen could plough in a day, later standardized as a strip 1 furlong (660 ft) long and 1 chain (66 ft) wide: 660 × 66 = 43,560 square feet. It remains the standard unit for land in the United States and is still widely used in the UK, Canada, and elsewhere for property and farmland.
The hectare is the metric land unit: 100 ares, or 10,000 square meters — a square 100 m on each side. It is accepted for use alongside the International System of Units (SI), and its symbol is ha. Since the 1959 International Yard and Pound Agreement fixed the foot at exactly 0.3048 m, one square foot is exactly 0.09290304 m², so one acre is exactly 43,560 × 0.09290304 = 4,046.8564224 m² = 0.40468564224 ha. The conversion is exact in that direction and a non-terminating decimal in the other (1 ha = 2.4710538146… acres). The calculator uses the exact factor, so there is no rounding drift.
How the units compare
A hectare is almost two and a half times the size of an acre, which is why switching between them without converting causes big mistakes:
- 1 acre — 43,560 ft² = 4,840 yd² ≈ 4,046.86 m² ≈ 0.4047 ha. About a square 208.7 ft on each side.
- 1 hectare — 10,000 m² ≈ 107,639 ft² ≈ 2.4711 acres. A square 100 m (about 328 ft) on each side.
- 1 square mile — exactly 640 acres ≈ 258.9988 ha. One section in the US Public Land Survey System.
On a 100-acre farm, reading acres as hectares would overstate the land by nearly 60 ha (about 147 acres). Because the conversion itself is exact, the only real uncertainty in your result is the acreage you start with, which usually comes from a survey, a deed, a plat, or a listing that may be rounded.
What the Acres to Hectares Converter Calculates
More than a single hectare figure — the tool gives you a complete land-area breakdown across metric, US customary, and survey units, formatted for listings, appraisals, farm records, or reports.
Exact Hectares (Hero Result)
The headline result multiplies your acres by the exact factor 0.40468564224 and shows it at the precision you select, with a summary line beneath it that also gives square meters and the acres-and-square-feet split.
Square Meters
Square meters (acres × 4,046.8564224) are how most metric site plans, building permits, and international listings describe land. Having them next to hectares lets you match any metric document without a second calculation.
Acres & Square Feet (Composite)
Fractional acreage is split into whole acres plus leftover square feet — 2.5 acres becomes 2 acres 21,780 ft². That’s how many lot descriptions and building plans read, so you can match a listing or plat at a glance.
Square Feet & Square Yards
Square feet (acres × 43,560) are the standard for US lot sizes and zoning minimums, and square yards (acres × 4,840) appear on sod, seed, and paving estimates. Both are shown so you can move between land and project scale.
Square Kilometers, Miles & Ares
Large-scale units round out the ladder — square kilometers (1 km² = 100 ha), square miles (640 acres each), and ares (100 m² each), which are still used in parts of Europe and in some property records.
Chart, Reference Table & PDF
A log-scale bar chart compares your value in acres, hectares, square meters, square feet, and square yards so very different magnitudes fit on one view. A reference table of common parcels highlights your input when it matches, and the two-page PDF bundles everything for sharing or record-keeping.
Acres to Hectares Conversion Chart — Common Values
Bookmark this page or screenshot the table below for instant reference. Every value uses the exact definition 1 acre = 0.40468564224 ha, rounded to four decimals for hectares and two for square meters. Lot-size descriptions are typical figures and vary by region and zoning.
| Acres | Hectares | Square Meters | Square Feet | Common Use |
|---|---|---|---|---|
| 0.1 acre | 0.0405 ha | 404.69 m² | 4,356 ft² | Small urban lot |
| 0.25 acre | 0.1012 ha | 1,011.71 m² | 10,890 ft² | Typical suburban lot |
| 0.5 acre | 0.2023 ha | 2,023.43 m² | 21,780 ft² | Large suburban lot |
| 1 acre | 0.4047 ha | 4,046.86 m² | 43,560 ft² | ≈ ¾ of a US football field (with end zones) |
| 2.4711 acres | 1.0000 ha | 10,000.00 m² | 107,639.10 ft² | Exactly 1 hectare (100 m × 100 m) |
| 2.5 acres | 1.0117 ha | 10,117.14 m² | 108,900 ft² | Rural homesite (typical) |
| 5 acres | 2.0234 ha | 20,234.28 m² | 217,800 ft² | Hobby farm or small acreage |
| 10 acres | 4.0469 ha | 40,468.56 m² | 435,600 ft² | Small farm or large rural parcel |
| 20 acres | 8.0937 ha | 80,937.13 m² | 871,200 ft² | Pasture or small orchard |
| 40 acres | 16.1874 ha | 161,874.26 m² | 1,742,400 ft² | Quarter-quarter section (1/16 section) |
| 80 acres | 32.3749 ha | 323,748.51 m² | 3,484,800 ft² | Half of a quarter section |
| 100 acres | 40.4686 ha | 404,685.64 m² | 4,356,000 ft² | Round-number reference |
| 160 acres | 64.7497 ha | 647,497.03 m² | 6,969,600 ft² | Quarter section (US land survey) |
| 247.1054 acres | 100.0000 ha | 1,000,000.00 m² | 10,763,910.42 ft² | Exactly 1 square kilometer |
| 640 acres | 258.9988 ha | 2,589,988.11 m² | 27,878,400 ft² | 1 square mile (1 section) |
How to Measure a Lot and Compare Metric Land Listings
The most common reason people convert acres to hectares is to line up a US land figure with a metric one — a lot measured in feet against a site plan in square meters, a farm listed in acres against one abroad listed in hectares, or a price per acre against a price per hectare. Getting both the area and the unit price right keeps the comparison fair.
The manual calculation
Step 1: For a rectangular parcel, multiply length × width in feet. Step 2: Divide square feet by 43,560 to get acres. Step 3: Multiply acres by 0.40468564224 for hectares. For a 250 ft × 400 ft lot:
100,000 ft² ÷ 43,560 = 2.2957 acres
2.2957 acres × 0.40468564224 = 0.9290 ha
Result: 0.93 ha (2 acres 12,880 ft²)
Enter the acreage into the calculator and it does the rest: the hero result shows hectares, the square-meter line matches a metric site plan, and the “acres & ft²” card mirrors how many US lot descriptions are written. For irregular parcels, use the acreage from the survey or plat rather than estimating from frontage and depth.
Converting price per acre to price per hectare
Unit prices move in the opposite direction from areas. Because a hectare is larger than an acre, a price per hectare is higher than the same land priced per acre:
- Price per hectare = price per acre ÷ 0.40468564224 (≈ × 2.47105)
- Price per acre = price per hectare × 0.40468564224
- Example: $10,000 per acre = about $24,710.54 per hectare
- Example: $25,000 per hectare = about $10,117.14 per acre
Acres to Hectares — Key Conversion Numbers
The Acres to Hectares Converter Is Built For You If…
Whether you’re comparing lot sizes, buying farmland, or working from a metric site plan — this calculator gives you the exact answer in seconds, with a report you can save and share.
Homebuyers & Homeowners
Lot sizes & listingsUS listings describe lots in acres or square feet, while international listings, relocation packages, and many online tools use hectares or square meters. Converting helps you picture a lot, compare homes across markets, and check a listing against the plat.
- A quarter-acre lot is about 0.10 ha, or 1,012 m²
- Listing acreage is often rounded — check the survey
- Compare usable land, not just total acreage
- Save the PDF with the listing for reference
Land, Farm & Ranch Buyers
Acreage & price per unitFarmland and ranch land are priced per acre in the US but per hectare in most other countries, and crop yields and inputs are often quoted per hectare in research and international data. Converting area and unit price lets you compare parcels and returns fairly.
- A 160-acre quarter section is about 64.75 ha
- Price per ha = price per acre × 2.47105
- Confirm tillable vs total acreage before comparing
- Use 3–4 decimals for offers and appraisals
Developers, Surveyors & Planners
Plats & site plansDevelopers, surveyors, planners, and students often move between US survey records in acres and metric plans, environmental reports, or international standards in hectares. An exact converter with a printable report documents the factor used and keeps figures consistent.
- 1 acre = 0.40468564224 ha exactly — no rounding needed
- Density per ha = density per acre × 2.47105
- Keep the original unit on legal descriptions
- Attach the PDF to show the factor and precision used
7 Tips for Accurate Acres to Hectares Conversions
The conversion is exact, but the acreage you start with often isn’t. Most mistakes come from rounded listing figures, mixed-up unit prices, rough shortcuts, and confusing total with usable land. These rules keep every conversion trustworthy.
Start From the Survey, Not the Listing
Listings often round acreage (“about 5 acres”), while surveys and plats give a precise figure. Convert the surveyed number when precision matters, and note which source you used.
Separate Total From Usable Land
Total acreage can include roads, easements, wetlands, or steep ground. When comparing parcels, convert the usable or tillable area as well as the total so you’re comparing like with like.
Convert Unit Prices the Other Way
Areas get smaller when you switch from acres to hectares, but prices per unit get larger. Multiply a price per acre by about 2.47105 for the price per hectare. Converting only the area makes metric land look about 2.5 times more expensive than it is.
Don’t Round to 0.4 on Large Parcels
Multiplying by 0.4 understates hectares by about 1.2%. That’s harmless for a small lot, but on a 160-acre quarter section it’s about 0.75 ha — nearly 2 acres. Use the exact factor for offers, appraisals, and contracts.
Know the Survey Anchors
In the US Public Land Survey System, a section is 640 acres (1 sq mi), a quarter section is 160 acres, and a quarter-quarter is 40 acres. Recognizing these helps you spot typos in legal descriptions before you convert.
Keep the Original Unit on Legal Documents
Deeds, plats, and legal descriptions should keep the unit they were recorded in. Convert to hectares for planning, comparison, and reporting, and note both figures in your own records.
Memorize Three Anchors for Mental Math
1 acre ≈ 0.4 ha ≈ 4,047 m². 1 ha ≈ 2.5 acres ≈ 107,600 ft². 1 sq mi = 640 acres ≈ 259 ha. With these you can sanity-check any listing in your head — a 10-acre parcel is roughly 4 ha, and a 20-ha farm is about 49 acres.
Acres to Hectares Converter — Frequently Asked Questions
Everything you need to know about converting acres to hectares, how the units compare, and how to apply this calculator to lots, farmland, listings, and land pricing.
One acre equals exactly 0.40468564224 hectares, or about 0.4047 ha. The figure is exact because an acre is 43,560 square feet and the international foot is exactly 0.3048 meters, so 1 acre = 4,046.8564224 m², and 1 hectare = 10,000 m².
Multiply acres by 0.40468564224: ha = acres × 0.40468564224. For example, 5 acres × 0.40468564224 = 2.0234 ha, and 10 acres = 4.0469 ha. To go from hectares back to acres, divide by 0.40468564224, or multiply by about 2.47105.
Multiply hectares by about 2.47105 (exactly 1 ÷ 0.40468564224). For example: 1 ha = 2.4711 acres, 2 ha = 4.9421 acres, 5 ha = 12.3553 acres, 10 ha = 24.7105 acres, and 100 ha = 247.1054 acres. This converter takes acres as its input; to check a result, enter the acre figure you calculated and confirm the hectare result matches.
Yes. A hectare is about 2.47 times larger than an acre. One hectare is a square 100 meters on each side (about 328 ft × 328 ft), while one acre is equivalent to a square about 208.7 ft on each side. An acre is roughly 40.5% of a hectare.
An acre is exactly 43,560 square feet, 4,840 square yards, or 4,046.8564224 square meters. A hectare is exactly 10,000 square meters, or about 107,639.10 square feet. One hectare also equals 100 ares, and one acre equals about 40.47 ares.
Using the exact factor: 0.25 acre = 0.1012 ha, 0.5 acre = 0.2023 ha, 1 acre = 0.4047 ha, 2.5 acres = 1.0117 ha, 5 acres = 2.0234 ha, 10 acres = 4.0469 ha, 20 acres = 8.0937 ha, 40 acres = 16.1874 ha, 100 acres = 40.4686 ha, 160 acres = 64.7497 ha, and 640 acres = 258.9988 ha. Enter any value in the calculator above for up to 8 decimal places.
An acre is 43,560 square feet — about the area of a square 208.7 ft on each side, or roughly three-quarters of an American football field including the end zones. Historically it was defined as a strip 1 furlong (660 ft) long and 1 chain (66 ft) wide. A typical suburban lot of a quarter acre is about 10,890 sq ft, or 0.1012 ha.
A square mile, called a section in the US Public Land Survey System, is exactly 640 acres, or about 258.9988 ha. A quarter section is 160 acres (about 64.7497 ha), and a quarter-quarter section is 40 acres (about 16.1874 ha). One square kilometer equals 100 ha, or about 247.1054 acres.
Divide the price per acre by 0.40468564224 (or multiply by about 2.47105) to get the price per hectare, because a hectare is larger. For example, $10,000 per acre equals about $24,710.54 per hectare. To go the other way, multiply the price per hectare by 0.40468564224: $25,000 per ha is about $10,117.14 per acre. Convert the unit price, not just the area, when comparing land listings.
For a rough estimate, yes, but multiplying by 0.4 understates hectares by about 1.2%. On a 160-acre quarter section, 0.4 gives 64 ha instead of 64.75 ha, a difference of three-quarters of a hectare, or nearly 2 acres. Use the exact factor for listings, appraisals, contracts, and survey work.
The international acre is based on the international foot of exactly 0.3048 m and equals 4,046.8564224 m². The older US survey acre was based on the slightly longer US survey foot and equals about 4,046.8726 m², a difference of about 4 parts per million. NIST deprecated the US survey foot at the end of 2022, and the difference is negligible for almost all property work. This converter uses the international acre.
The converter uses exact definitions: 1 acre = 43,560 ft² = 4,840 yd² = 4,046.8564224 m² = 0.40468564224 ha; 1 hectare = 10,000 m²; 1 square mile = 640 acres; and 1 are = 100 m². Calculations use double-precision floating-point arithmetic, accurate to about 15 significant digits, and display precision is adjustable from 0 to 8 decimal places. In practice, accuracy is limited by the survey or listing figure you start with, not by the conversion.
Accuracy note: The HomeExpertly Acres to Hectares Converter uses the exact definitions 1 acre = 43,560 square feet = 4,046.8564224 square meters = 0.40468564224 hectares and 1 hectare = 10,000 square meters, together with 1 acre = 4,840 square yards, 1 square mile = 640 acres, and 1 are = 100 square meters, based on the foot as defined by the 1959 International Yard and Pound Agreement and recognized by the U.S. National Institute of Standards and Technology (NIST) and the International Bureau of Weights and Measures (BIPM). The international acre is used; historical US survey acres differ by about 4 parts per million. All calculations are mathematically precise to the decimal precision you select (up to 8 places). However, results are for informational and reference purposes only. Lot-size descriptions and other examples on this page are typical figures that vary by region, zoning, and property. For applications where area is critical — including but not limited to property purchases and sales, legal descriptions, boundary and title matters, appraisals, zoning and subdivision, agricultural programs, or contract pricing — always verify figures independently using a licensed surveyor’s measurements, recorded plats and deeds, and the applicable regulations. HomeExpertly is not responsible for any consequences arising from the use of these conversions, including but not limited to boundary disputes, valuation errors, permitting issues, or pricing disputes. When in doubt, rely on the recorded survey, confirm which unit is used, and consult a qualified professional.