# Hectares to Acres Converter URL: https://speedycalculator.com/calculators/conversion/hectares-to-acres/ Last updated: 2026-10-25 > Convert hectares (ha) to acres (acre): 1 hectare = 2.4710538 acre, so multiply by 2.4710538 or divide by 0.40468564. Both fields are editable, so you can also type in acres and get hectares back. ## Inputs - Hectares (ha) ## Results - Acres ## Formula ``` 1 ha = 2.4710538 acre 1 acre = 0.40468564 ha acre = ha × 2.4710538 ``` ## Explanation Multiply hectares by 2.47105 to get acres. A hectare is a square 100 m on each side, a bit larger than two football pitches. ### How to use the Hectares to Acres Converter - Type the number of hectares into the **Hectares** field. Decimals such as 0.5 are fine. - Read the answer in **Acres** – it updates as you type, with no button to press. - To convert the other way, type into **Acres** and the hectares are recalculated. - Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion. This page converts only ha ⇄ acre. Need a different unit? Use the general area converter, where you can choose any “from” and “to” unit. ### How it works Both units measure area, so they are always in the same ratio: one hectare equals 2.4710538 acres. The calculator multiplies the number of hectares you type by 2.4710538 to give acres, and when you type into the acres field it divides by the same factor to give hectares. Because the ratio never changes, doubling the hectares always doubles the acres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation). ### How to convert hectares to acres - Write down the value in hectares, for example **1 ha**. - Multiply by the conversion factor 2.4710538 (because 1 hectare = 2.4710538 acre). - 1 × 2.4710538 = **2.4710538 acre**. - To go back from acres to hectares, divide by 2.4710538 – or multiply by 0.40468564. ### ha to acre conversion table HectaresAcresAcresHectares0.1 ha0.24710538 acre1 acre0.40468564 ha0.5 ha1.2355269 acre2 acre0.80937128 ha1 ha2.4710538 acre5 acre2.0234282 ha2 ha4.9421076 acre10 acre4.0468564 ha5 ha12.355269 acre20 acre8.0937128 ha10 ha24.710538 acre50 acre20.234282 ha20 ha49.421076 acre100 acre40.468564 ha50 ha123.55269 acre1,000 acre404.68564 ha100 ha247.10538 acre1,000 ha2,471.0538 acre ### What is a hectare? A hectare is 10,000 m², a square 100 m on each side. Farmland and forests are measured in hectares in most countries; one hectare is about 2.471 acres. ### What is an acre? An acre is exactly 43,560 square feet, about 4,047 m². Historically it was the land a team of oxen could plough in a day. It remains the land unit in the U.S. and UK. ### Quick mental conversion For a fast estimate, multiply hectares by about **2.5** to get acres; the error is about 1.2%. Use the calculator above when you need the exact figure. ### Common mistakes to avoid Converting area with a length factor (1 m = 3.28 ft, but 1 m² = 10.76 ft², not 3.28 ft²), and assuming regional land units such as marla, bigha or katha have one standard size everywhere. ## Worked example Inputs — Hectares: 1 ha. Results — **Acres = 2.47105381 acre**. ## FAQ **How many acres in a hectare?** About 2.471 acres. **How big is a hectare?** 10,000 m². **How do I convert hectares to acres?** Multiply the number of hectares by 2.4710538. For example, 1 ha × 2.4710538 = 2.4710538 acre. **How do I convert acres back to hectares?** Divide by 2.4710538 (or multiply by 0.40468564), or simply type the value into the acres field above. **What is 10 ha in acres?** 10 ha = 24.710538 acre. **What is 100 ha in acres?** 100 ha = 247.10538 acre. **Is this conversion exact?** Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit. **Can I convert to other units on this page?** This page converts only between hectares and acres. To pick any area unit, use the general area converter linked under Related calculators. **What formula does the Hectares to Acres Converter use?** 1 ha = 2.4710538 acre. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)