Langleys to Joules per Square Meter Converter
Enter the heat density in langleys below to convert it to joules per square meter.
Convert Langleys to Joules per Square Meter
Enter a value in langleys (Ly) to convert to joules per square meter (J/m²).
Langley to Joule per Square Meter Conversion Table
Table showing various langley measurements converted to joules per square meter. Click any preset value or arrow to load it into the converter.
| Langleys (Ly) | Joules per Square Meter (J/m²) |
|---|---|
| 1 Ly | 41,840 J/m² |
| 2 Ly | 83,680 J/m² |
| 5 Ly | 209,200 J/m² |
| 10 Ly | 418,400 J/m² |
| 15 Ly | 627,600 J/m² |
| 20 Ly | 836,800 J/m² |
| 25 Ly | 1,046,000 J/m² |
| 30 Ly | 1,255,200 J/m² |
| 50 Ly | 2,092,000 J/m² |
| 75 Ly | 3,138,000 J/m² |
How to Convert Langleys to Joules per Square Meter
To convert langleys to joules per square meter, multiply the heat density by the following conversion ratio: 41,840 joules per square meter/langley.
Since one langley is equal to 41,840 joules per square meter, you can use this simple formula to convert:
The heat density in joules per square meter is equal to the heat density in langleys multiplied by 41,840.
For example, here's how to convert 10 langleys to joules per square meter using the formula above.
How Many Joules per Square Meter Are in a Langley?
There are 41,840 joules per square meter in a langley, which is why we use this value in the formula above.
Our langley to joule per square meter calculator automatically converts your heat density measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Langleys and joules per square meter are both units used to measure heat density. Keep reading to learn more about each unit.
What Is a Langley?
A langley is a unit of heat density equal to 41,840 joules per square meter (J/m²), the base unit for heat density. Solar insolation unit equal to 1 thermochemical calorie/cm² (41,840 J/m²). [1]
The langley is classified as a metric and SI-compatible unit of heat density. Langleys can be abbreviated as Ly; for example, 1 langley can be written as 1 Ly.
When working with langleys (Ly) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, langleys (Ly) are widely used across large-scale industrial, bulk, and macro-level heat density specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Joule per Square Meter?
SI unit of areal heat density and radiant exposure. It serves as a primary reference unit for measuring heat density across scientific and practical applications. [2]
The joule per square meter is classified as an International System of Units (SI) unit of heat density. Joules per Square Meter can be abbreviated as J/m²; for example, 1 joule per square meter can be written as 1 J/m².
As the primary coherent reference unit for heat density in this category, all other heat density units are mathematically anchored to the joule per square meter (J/m²).
In practice, joules per square meter (J/m²) are widely used across standard heat density applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting heat density between langleys (Ly) and joules per square meter (J/m²), keep full floating-point precision (1 Ly = 41,840 J/m²; 1 J/m² = 0.000023901 Ly) during intermediate calculations and round only the final joule per square meter figure to match your instrument tolerance.
More Langley & Joule per Square Meter Conversions
Need to calculate in the opposite direction? Use our joules per square meter to langleys converter (J/m² to Ly) to switch your starting unit immediately. You can also explore related tools such as converting kilojoules per square meter to joules per square meter, converting megajoules per square meter to joules per square meter, or converting joules per square meter to kilojoules per square meter.
Convert from Langleys
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Heat Density Metrology Standard — Langleys (Ly) to Joules per Square Meter (J/m²)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Langley (cal/cm²) (Ly) & Joule per Square Meter (J/m²)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (Ly to J/m²)