Langley
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 to Joule per Square Meter
Convert langley to joule per square meter instantly. Type in either field — results update live.
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Heat Density Langley Joule per Square Meter
1 langley = 41,840 joules per square meter
Unit
Unit
Conversion table
Selected langley values converted to J/m² using the exact factor from this tool.
| langley | J/m² |
|---|---|
| 0.01 | 418.4 |
| 0.1 | 4,184 |
| 1 | 41,840 |
| 2 | 83,680 |
| 3 | 125,520 |
| 5 | 209,200 |
| 10 | 418,400 |
| 20 | 836,800 |
| 50 | 2,092,000 |
| 100 | 4,184,000 |
| 1,000 | 41,840,000 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 langley = 41840 J/m²
1 J/m² = 0.0000239006 langley
To convert langley to joule per square meter, multiply by 41840.
To convert joule per square meter to langley, multiply by 0.0000239006.
Example: convert 10 langley to J/m²
10 × 41840 = 418400 J/m²
About these units
Short background on the units used in this conversion.
Joule per Square Meter (J/m²)
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.
Frequently asked questions
How many joules per square meter are in one langley?
One langley equals 41,840 joules per square meter. Multiply your langleys value by 41,840 to convert to joules per square meter.
What is the conversion formula?
J/m² = langley × 41,840The reverse is
langley = J/m² × 0.0000239006, using the same exact factors as this converter.Is this Langley to Joule per Square Meter converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All langley conversions
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