Acres to Hectares Converter
Convert acres to hectares for US land, farming, and international property comparison.
How It Works
Formula: acre to ha = value × 0.404685642
Example: 1 acre = 0.404686 ha
Note: 1 acre equals 0.4047 hectares, the US land unit converted to the metric area standard.
Common Uses
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 ha
Precision Guidance
For land, round to 2 decimals. For farming records, keep 3-4 decimals.
Common Mistakes
An acre (0.405 ha) is less than half a hectare. Do not treat them as roughly equal.
Frequently Asked Questions
What is 1 acre in hectares?
1 acre equals 0.4047 hectares (1 acre = 43,560 sq ft = 0.404686 ha).
How do I convert acres to hectares?
Multiply the acre value by 0.4047. For example, 10 acres × 0.4047 = 4.047 ha.
How big is a hectare?
1 hectare equals 10,000 square meters, or about 2.471 acres.
Is this used for farming?
Yes, US farmland uses acres, while international agriculture uses hectares.
Deep Dive Guide
Acres to Hectares: Exact Land Conversion for US Farms and Large Lots
Convert acres to hectares accurately for US farmland, rural property, and international land comparison using the exact acre to hectare factor.
Read Full Guide →More Converters You May Like
Square Feet to Square Meters Converter
Convert square feet to square meters for US real estate and international property listings.
Square Meters to Square Feet Converter
Convert square meters to square feet for reading international property and floor plans.
Acres to Square Feet Converter
Convert acres to square feet for US land development and lot size measurement.
Last Updated 2026 | This converter was reviewed for accuracy