Convert Square millimeters to hectares

1 square millimeter = 1.000000e-10 hectares · ha = mm² ÷ 10,000,000,000

mm²
Hectares
1.000000e-10ha

1 square millimeter = 1.000000e-10 hectares

When you need this conversion

This conversion goes from square millimeters, used for wire gauge and small cross-sections, to hectares, the metric land measure used in agriculture worldwide. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.

Square millimeters to hectares conversion table

Conversion table from square millimeters to hectares
Square millimeters (mm²)Hectares (ha)
1 mm²1.000000e-10 ha
2 mm²2.000000e-10 ha
3 mm²3.000000e-10 ha
5 mm²5.000000e-10 ha
10 mm²1.000000e-9 ha
15 mm²0.000000001 ha
20 mm²0.000000002 ha
25 mm²0.000000002 ha
50 mm²0.000000005 ha
75 mm²0.000000007 ha
100 mm²0.00000001 ha
250 mm²0.000000025 ha
500 mm²0.00000005 ha
1,000 mm²0.0000001 ha

The formula

ha = mm² ÷ 10,000,000,000

Because both units measure area, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.

Convert the other way

Hectares to square millimeters →

Related area conversions

All area conversions →

Frequently asked questions

How many hectares are in a square millimeter?
There are 1.000000e-10 hectares in 1 square millimeter. The formula is ha = mm² ÷ 10,000,000,000.
How do you convert square millimeters to hectares?
Use the formula ha = mm² ÷ 10,000,000,000. For example, 10 square millimeters equals 1.000000e-9 hectares.
Is the square millimeters to hectares conversion exact?
Yes. Square millimeters and hectares are both units of area, related by an exact defined factor. Displayed results are rounded for readability.
What is mm² short for?
mm² is the standard symbol for square millimeter. ha is the symbol for hectare.