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Square kilometers to Hectares (km² to ha)

Convert square kilometers to hectares: 1 km² = 100 ha. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

Formula

1 km² = 100 ha

hectares = square kilometers × 100 — reverse: square kilometers = hectares × 0.01

The factor is derived from the SI definitions of both units (base unit: m2) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

5 km² = 500 ha
12.5 km² = 1250 ha
100 km² = 10000 ha

Square kilometers to hectares conversion table

Square kilometers (km²)	Hectares (ha)
1	100
2	200
3	300
4	400
5	500
6	600
7	700
8	800
9	900
10	1000
15	1500
20	2000
25	2500
30	3000
40	4000
50	5000
75	7500
100	10000
200	20000
250	25000
500	50000
1000	100000

FAQ

How many hectares are in one square kilometer?

1 km² = 100 ha. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert square kilometers to hectares?

Multiply the value in square kilometers by 100: hectares = square kilometers × 100. For example, 5 km² = 500 ha.

How do I convert hectares back to square kilometers?

Multiply by the inverse factor 0.01 (square kilometers = hectares × 0.01), or use the hectares-to-square kilometers page.

Related conversions

Hectares to square kilometers (reverse)
Area Converter — all area units in one tool
Square meters to Square feet
Square feet to Square meters
Acres to Hectares
Hectares to Acres
Acres to Square meters
Square meters to Acres
Square kilometers to Square miles
Square miles to Square kilometers

Machine access

API: GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=km2&to_unit=ha
MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"km2","to_unit":"ha"}
Markdown: https://tttkmbb.com/conversion/square-km-to-hectares.md · JSON: https://tttkmbb.com/conversion/square-km-to-hectares.json (add ?value= for a result) · Units: /api/v1/units?quantity=area
OpenAPI operationId: convert_units. Freshness: static. Authentication: none.