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Heat density converter
Energy delivered per unit area. 6 units, converted from one table of exact factors.
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1 joule/square meter in every other heat density unit
Computed by the same engine that runs the converter above, so these can never drift apart from it.
| From | Equals | Unit |
|---|---|---|
| 1 joule/square meter | 0.001 | kilojoule/square meter (kJ/m²) |
| 1 joule/square meter | 0.000001 | megajoule/square meter (MJ/m²) |
| 1 joule/square meter | 0.00002390057361 | calorie/square centimeter (cal/cm²) |
| 1 joule/square meter | 0.00002390057361 | langley (Ly) |
| 1 joule/square meter | 0.00008805509325 | BTU/square foot (Btu/ft²) |
What each unit actually is
Most converters give you a number and stop. Where a figure is exact by definition we say so, and where it is an average or shifts with conditions we say that too — that is usually the thing you needed to know.
| Unit | Symbol | What it actually is |
|---|---|---|
| joule/square meter | J/m² | SI. |
| kilojoule/square meter | kJ/m² | |
| megajoule/square meter | MJ/m² | |
| calorie/square centimeter | cal/cm² | |
| langley | Ly | The solar-radiation unit. Same size as cal/cm². |
| BTU/square foot | Btu/ft² |
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