Convert square millimeter to hectare
1 mm² = 1.000000000e-10 ha
1 mm² = 1.0000e-10 ha
1 mm² in every area unit
| microbarn | 1.0000e+28 μb |
| millibarn | 1.0000e+25 mb |
| barn | 1.0000e+22 b |
| square nanometer | 1,000,000,000,000 nm² |
| square micrometer | 1,000,000 μm² |
| circular mil | 1,973.5 cmil |
| thousand circular mils | 1.9735 kcmil |
| square millimeter | 1 mm² |
| square centimeter | 0.01 cm² |
| square inch | 0.00155 in² |
| square decimeter | 0.0001 dm² |
| square foot | 0.000010764 ft² |
| square yard | 0.000001196 yd² |
| square meter | 0.000001 m² |
| tsubo | 3.0250e-07 tsubo |
| square rod | 3.9537e-08 rd² |
| are | 1.0000e-08 a |
| square chain | 2.4711e-09 ch² |
| dunam | 1.0000e-09 dunam |
| rood | 9.8842e-10 rood |
| acre | 2.4711e-10 ac |
| hectare | 1.0000e-10 ha |
| square kilometer | 1.0000e-12 km² |
| square mile | 3.8610e-13 mi² |
How the conversion works
Multiply by 1.000000000e-10 to go from square millimeter to hectare, or divide by it to go back. Every conversion on this site routes through the SI value (m²) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? hectare to square millimeter — 1 ha = 10,000,000,000 mm².
square millimeter to hectare — common values
| 1 mm² | 1.0000000e-10 ha |
| 2 mm² | 2.0000000e-10 ha |
| 3 mm² | 3.0000000e-10 ha |
| 5 mm² | 5.0000000e-10 ha |
| 10 mm² | 1.0000000e-09 ha |
| 15 mm² | 1.5000000e-09 ha |
| 20 mm² | 2.0000000e-09 ha |
| 25 mm² | 2.5000000e-09 ha |
| 50 mm² | 5.0000000e-09 ha |
| 75 mm² | 7.5000000e-09 ha |
| 100 mm² | 1.0000000e-08 ha |
| 250 mm² | 2.5000000e-08 ha |
| 500 mm² | 5.0000000e-08 ha |
| 1000 mm² | 1.0000000e-07 ha |