Convert between m², hectares, acres, sq ft and South-Asian regional units — bigha, kanal, marla, katha, cent and tsubo — with a to-scale plot visualiser.
| Unit | Value |
|---|---|
| Square metre (m²) | 4,046.8564 |
| Square kilometre (km²) | 0.00404686 |
| Hectare (ha) | 0.40468564 |
| Are (a) | 40.4686 |
| Square foot (ft²) | 43,560 |
| Square yard (yd²) | 4,840 |
| Acre | 1 |
| Square mile (mi²) | 0.0015625 |
| Centregional | 100 |
| Marlaregional | 159.9997 |
| Kanalregional | 8 |
| Bighavaries by region | 1.6 |
| Kathavaries by region | 60.5002 |
| Tsubo (坪)regional | 1,224.1741 |
Regional unit note
Bigha and katha vary significantly by region or state — this converter uses the Uttar Pradesh / Bihar "pucca bigha" (≈ 2529 m²) and the Bangladesh standard katha (≈ 66.89 m²). Always verify with a local land registry.
All conversions route through square metres (m²). Every unit has a fixed m² factor — for example 1 acre = 4046.8564224 m² (NIST SP-811). Dividing the total m² by each unit's factor gives the equivalent value.
South-Asian regional units — marla, kanal, bigha, katha, cent — evolved from local land-measurement traditions and sometimes vary between states or districts. The NIST-defined acre and hectare are internationally standardised.
One kanal equals exactly 20 marla. In standard measurement (Pakistan / North India), 1 marla = 30.25 yd² ≈ 25.29 m², so 1 kanal ≈ 505.86 m² or roughly 0.125 acre.
Bigha is a pre-metric unit that was never standardised nationally. Different Indian states adopted different values: UP/Bihar "pucca bigha" ≈ 2529 m²; Rajasthan bigha ≈ 2529–3025 m²; West Bengal bigha ≈ 1338 m². This converter uses the UP/Bihar pucca bigha as its reference.
A cent is 1/100 of an acre (≈ 40.47 m²). It is used mainly in South India — Tamil Nadu, Kerala, Andhra Pradesh and Telangana — for residential plot sizes.
This converter instantly translates any land or plot size between metric, imperial, and South-Asian regional units. Enter an area in one unit — square metres, acres, hectares, bigha, marla, or any of the others — and see the equivalent in all fourteen units at once. Use it when buying or selling land across borders, checking a property listing, or converting survey measurements for engineering or agriculture.
Every row in the results table is one unit and its equivalent for the area you entered. Values are rounded for readability; the internal calculation uses the full precision of internationally defined conversion factors. Units flagged with a regional-variation note (bigha and katha) are set to a specific regional standard — check the method section to see which one was used.
Enter 1 acre as the input unit.
1 acre equals 4,046.86 m², 0.4047 hectares, 43,560 ft², 8 kanal, and approximately 160 marla — all displayed simultaneously.
Exactly 4,046.8564224 m², as defined by the international agreement of 1959 that fixed the yard at 0.9144 m. This makes 1 acre = 43,560 square feet exactly, and ≈ 0.4047 hectares.
A hectare is 10,000 m² — one square with 100 m sides. It is the standard metric unit for large areas of land. One hectare equals approximately 2.471 acres, so an acre is about 40 % of a hectare.
Bigha is a traditional South-Asian land unit that was never internationally standardised. Different Indian states and Bangladesh defined it independently: values range from roughly 1,000 m² (parts of Bengal) to 3,025 m² (Rajasthan). This converter uses the Uttar Pradesh and Bihar "pucca bigha" of 2,529.3 m², which equals 5/8 of an acre. Always confirm the local definition when using bigha in a legal or property context.
In the standard used across Pakistan and North India, 1 kanal = 20 marla, and 1 marla = 30.25 square yards (25.2929 m²). This gives 1 kanal ≈ 505.86 m², or exactly 1/8 of an acre. The figure shown uses that definition.
Tsubo is the traditional Japanese area unit for residential land and floor space. One tsubo equals exactly 400/121 m² ≈ 3.3058 m², which is 36 square shaku (the Japanese foot). Real-estate listings in Japan commonly quote prices per tsubo.
All conversions use a single base unit of one square metre. Each unit is defined by its exact square-metre factor: 1 hectare = 10,000 m² (SI definition); 1 are = 100 m²; 1 km² = 1,000,000 m²; 1 foot = 0.3048 m exactly, so 1 ft² = 0.09290304 m² and 1 yd² = 0.83612736 m²; 1 acre = 4,046.8564224 m² (1 acre = 4,840 yd²); 1 mi² = 640 acres = 2,589,988.110336 m². Regional units: cent = 1/100 acre = 40.4685642 m² (South India); marla = 30.25 yd² = 25.2929 m² (Pakistan/North India standard); kanal = 20 marla = 505.858 m²; bigha = 2,529.3 m² (Uttar Pradesh/Bihar pucca bigha = 5/8 acre — other regions differ); katha = 66.89 m² (Bangladesh standard — other regions differ); tsubo = 400/121 m² ≈ 3.3058 m² (Japan). The converter multiplies the input by the from-unit factor to get the base area in m², then divides by each target factor to produce the result. Factors follow NIST SP-811 for SI and imperial units.
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