Land area is where the US customary and metric systems diverge the most visibly — real-estate listings in acres, European land registries in hectares, and everything from countries to city parks measured in square kilometers. Our new Area Converter puts all six units side by side.
- Two-way live conversion — type a number in either box and the other updates instantly; no “Convert” button to click.
- Swap in one click — flip the “From” and “To” units (and their values) without retyping anything.
- All six units, always visible — a reference table below the converter shows your value in m², ft², acres, hectares, km², and mi² simultaneously.
- Exact conversion factors — every factor traces back to the international foot (0.3048 m exactly) or the plain metric definitions of hectare and km², so results are limited only by floating-point precision, never by rounding in the constants.
- Shareable links — your value and unit choice sync to the URL, so you can bookmark or share a specific conversion.
Try it with 1 acre and you’ll see it’s exactly 4,046.8564224 m², about 0.4047 hectares, and exactly 43,560 ft² — all in the same glance.