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Sources and Accuracy
Area conversions are derived from squared length relationships, using square metre as the reference unit and fixed factors such as 1 square foot = 0.09290304 square metre.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
hectare [ha]
Definition
The hectare is a metric land area unit equal to 10,000 square meters.
History
Hectares were adopted with metric land measurement because they are convenient for fields and parcels.
Current use
Hectares are used for agriculture, land records, forestry, environmental reporting, and large property areas.
square nanometer [nm²]
Definition
The square nanometer (nm²) is a area unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use square nanometer when comparing area values, checking specifications, converting between systems, or preparing quick estimates.
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How to Convert
Enter the value in the “From value” field.
Confirm the source unit is hectare [ha].
Confirm the target unit is square nanometer [nm²].