How do I convert ha to km²?

Use the formula shown above or enter a value to see ha converted to km² instantly.

What is the formula for ha to km²?

The converter calculates km² by applying the category-specific conversion factor for Area.

When should I use ha vs km²?

ha and km² are both part of the Area category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Area Converter & Surface Reference

Convert ha to km²

Use the live converter below to translate between Hectare (ha) and Square Kilometer (km²). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

ha → km²

Hectare

Square Kilometer

0.01

km²

Rounded result (4 decimals max)

Formula

1 ha = 0.01 km²

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from km² to ha.

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ha to km² quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Hectare (ha)	Square Kilometer (km²)
0.25 ha	0.0025 km²
0.5 ha	0.005 km²
1 ha	0.01 km²
2 ha	0.02 km²
5 ha	0.05 km²
10 ha	0.1 km²
25 ha	0.25 km²
100 ha	1 km²

km² back to ha

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Square Kilometer (km²)	Hectare (ha)
0.25 km²	25 ha
0.5 km²	50 ha
1 km²	100 ha
2 km²	200 ha
5 km²	500 ha
10 km²	1,000 ha
25 km²	2,500 ha
100 km²	10,000 ha

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