Convert joule per square meter to langley instantly. Type in either field — results update live.
Selected J/m² values converted to langley using the exact factor from this tool.
| J/m² | langley |
|---|---|
| 0.01 | 2.390057e-7 |
| 0.1 | 0.0000023901 |
| 1 | 0.0000239006 |
| 2 | 0.0000478011 |
| 3 | 0.0000717017 |
| 5 | 0.0001195029 |
| 10 | 0.0002390057 |
| 20 | 0.0004780115 |
| 50 | 0.0011950287 |
| 100 | 0.0023900574 |
| 1,000 | 0.0239005736 |
Exact conversion factors in both directions, plus a worked example.
1 J/m² = 0.0000239006 langley
1 langley = 41840 J/m²
To convert joule per square meter to langley, multiply by 0.0000239006.
To convert langley to joule per square meter, multiply by 41840.
Example: convert 10 J/m² to langley
10 × 0.0000239006 = 0.0002390057 langley
Short background on the units used in this conversion.
The joule per square meter (J/m²) is the SI unit of heat density — thermal energy accumulated per unit area.
Joules per square meter quantify solar exposure, radiative heating loads, and areal energy deposition in building and climate science.
A langley equals 41840 J/m² — one thermochemical calorie per square centimeter, used for solar radiation.
Langleys appear in solar engineering and meteorology to express daily or hourly insolation on a surface.
langley = J/m² × 0.0000239006J/m² = langley × 41,840, using the same exact factors as this converter.Jump to any heat density conversion starting from joule per square meter — including the reverse direction and every other unit in our dataset.