Convert langley to joule/square metre

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Langley

The langley (Ly) is a unit of radiant energy per unit area, equal to one thermochemical calorie per square centimetre (41,840 J/m²). Named after Samuel Pierpont Langley, it was widely used in meteorology and solar radiation research throughout the 20th century to express insolation values. 


Joule/Square Metre

The joule per square metre (J/m²) is the SI unit of radiant exposure or heat density. It represents the total energy incident on or passing through a unit area. Used in solar radiation measurements, laser energy delivery, and thermal analysis to quantify energy flux integrated over time. 


Langley to Joule/Square Metre conversion table
LangleyJoule/Square MetreJoule/Square MetreLangley
14184012.39E-05
28368024.78E-05
312552037.17E-05
520920050.0001195
10418400100.000239
20836800200.000478
251.046E+06250.0005975
502.092E+06500.00119503
1004.184E+061000.00239006
2501.046E+072500.00597514
5002.092E+075000.0119503
10004.184E+0710000.0239006
How to convert Langley to Joule/Square Metre

1 Ly = 41840 J/m². To convert any value, multiply it by 41840. For example, 25 Ly = 1.046E+06 J/m².

Frequently asked questions
How many J/m² are there in one Ly?
One Ly is equal to 41840 J/m².
How do you convert Langley to Joule/Square Metre?
Multiply the value in Langley by 41840 to get the result in Joule/Square Metre.
How much is 25 Ly in J/m²?
25 Ly is equal to 1.046E+06 J/m².
How do you convert Joule/Square Metre back to Langley?
Divide by the same factor: multiply the value in Joule/Square Metre by 2.39E-05 to get Langley.

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