🗺️Area Converter
Convert area units: square millimeters, centimeters, meters and kilometers, hectares, acres, square feet and square miles.
Worked examples
1 Square kilometers in Hectares
GET /api/v1/converters/area-converter?value=1&from=km2&to=ha
Result: 100 ha
100 Square kilometers in Hectares
GET /api/v1/converters/area-converter?value=100&from=km2&to=ha
Result: 10,000 ha
5 Hectares in Square kilometers
GET /api/v1/converters/area-converter?value=5&from=ha&to=km2
Result: 0.05 km²
2 Square kilometers in Acres
GET /api/v1/converters/area-converter?value=2&from=km2&to=acre
Result: 494.21 ac
Machine API (x402)
$0.001 / callThis tool is also a JSON API for AI agents. Requests without payment receive 402 Payment Required plus instructions; agents pay USDC on Base via the x402 protocol — no accounts, no API keys.
GET /api/v1/converters/area-converter?value=1&from=km2&to=ha HTTP/1.1
Host: agenttools-hub.vercel.app
→ 402 (payment required, instructions in headers)
→ 200 (after X-PAYMENT header; JSON body below)
{
"tool": "converters/area-converter",
"input": {"value":1,"from":"km2","to":"ha"},
"result": { "value": 100, "answer": "100 ha" }
}Agent docs: /llms.txt · OpenAPI spec · integration guide
About this tool
Convert land and property areas between metric and imperial units — square meters and kilometers, hectares, acres, square feet and square miles — using exact survey definitions.
value × km²factor ÷ target factor (all units relate to the m² base)
Frequently asked questions
How big is one acre?
One acre is 4,046.8564224 m², about 4,047 m² — roughly 40% of a hectare or a football pitch without the ends.
How many square feet in a square meter?
One square meter is 10.7639 square feet.
Hectare vs acre — which is bigger?
A hectare (10,000 m²) is about 2.471 acres.