Convert square kilometres to hectares

One square kilometre is 100 hectares. To convert any amount, multiply by 100. Going the other way, one hectare is 0.01 square kilometres.

Multiply the square kilometre figure by 100. So ha = km² × 100. For a quick mental estimate, multiplying by about 100 gets you within a percent or so, which is close enough for most everyday purposes.

One square kilometre is a medium city park. The square kilometre is the standard unit for reporting the area of cities, parks and countries in the metric world.

One hectare is about two and a half acres. A hectare is exactly 10,000 square metres — a square 100 m on a side — and is the standard agricultural land unit in the metric world.

Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding km² before converting introduces an error the conversion then multiplies.