What does "ha" mean?

"ha" stands for hectare, a unit of area measurement commonly used in farming and land management.

For comparison:

1 ha = 10,000 m² (square meters)
1 ha ≈ 2.47 acres
1 ha ≈ 107,639 ft² (square feet)
1 ha ≈ 0.00386 mi² (square miles)
1 ha ≈ 11,960 yd² (square yards)