Acres to Hectares Converter
Free online acres to hectares converter. Instantly convert acres to hectares with formula, conversion table, and step-by-step examples for land measurement.
Reviewed by UnitKick Editorial Team · Last updated
Conversion Table
| Acre (ac) | Hectare (ha) |
|---|---|
| 1 | 0.405 |
| 5 | 2.023 |
| 10 | 4.047 |
| 50 | 20.234 |
| 100 | 40.469 |
How to Convert Acre to Hectare
To convert acre to hectare, use the following formula:
hectares = acres × 0.404686
Example: Convert 1 ac to ha:
1 ac = 0.405 ha
When to Use This ACRE to HA Converter
Use this acres to hectares converter when land, farm, lot, or property measurements need to move between US customary and metric area units.
- Comparing real estate listings, land records, or agricultural parcels.
- Translating farm, field, and conservation-area sizes for international readers.
- Estimating landscape, forestry, or site-planning areas in metric units.
The formula: hectares = acres × 0.404686
Practical example: One acre equals 0.404686 hectares, so a 10-acre parcel is about 4.047 hectares.
Free Online Conversion Steps
Step 1: enter your ACRE value. Step 2: read the HA result.
This online converter is free. It shows the answer, formula, and common values.
Unit Conversion Formula
hectares = acres × 0.404686.
Keep extra digits while you calculate. Round only your final answer.
Unit Type and Name
ACRE and HA are units in the area category.
Use the full converter name when you need a clear source: Acres to Hectares Converter.
HTTPS Privacy Note
UnitKick loads over HTTPS. The conversion runs in your browser. Your value is not sent to a login form.
Accuracy and Rounding Notes
Area conversions square the underlying length relationship, so small rounding choices can become visible on large parcels.
Land records may round acreage differently. Keep extra decimals until the final report or listing.
Measurement Standards
UnitKick checks key formulas against public measurement sources. NIST provides guidance in the United States. BIPM maintains the SI unit reference.