How do I convert km² to ha?

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

What is the formula for km² to ha?

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

When should I use km² vs ha?

km² and ha 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 km² to ha

Use the live converter below to translate between Square Kilometer (km²) and Hectare (ha). 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

km² → ha

Square Kilometer

km²

Hectare

100

Rounded result (4 decimals max)

Formula

1 km² = 100 ha

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 ha to km².

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km² to ha quick table

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

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

ha back to km²

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

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

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