How to convert langleys to BTU per square foot
BTU/ft² = Ly × 3.684225043Multiply the value in langleys by 3.684225043. To go the other way, multiply by 0.271427502 (or divide by 3.684225043).
A langley is larger than a BTU per square foot: one langley contains 3.684225043 BTU per square foot.
Worked examples
- 1 langley1 Ly × 3.684225043 = 3.684225043 BTU/ft²
- 5 langleys5 Ly × 3.684225043 = 18.42112521 BTU/ft²
- 10 langleys10 Ly × 3.684225043 = 36.84225043 BTU/ft²
- 20 langleys20 Ly × 3.684225043 = 73.68450085 BTU/ft²
- 100 langleys100 Ly × 3.684225043 = 368.4225043 BTU/ft²
Langleys to BTU per square foot conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Langleys (Ly) | BTU per square foot (BTU/ft²) |
|---|---|
| 0.1 Ly | 0.3684225 BTU/ft² |
| 0.25 Ly | 0.92105626 BTU/ft² |
| 0.5 Ly | 1.8421125 BTU/ft² |
| 1 Ly | 3.684225 BTU/ft² |
| 2 Ly | 7.3684501 BTU/ft² |
| 3 Ly | 11.052675 BTU/ft² |
| 4 Ly | 14.7369 BTU/ft² |
| 5 Ly | 18.421125 BTU/ft² |
| 6 Ly | 22.10535 BTU/ft² |
| 7 Ly | 25.789575 BTU/ft² |
| 8 Ly | 29.4738 BTU/ft² |
| 9 Ly | 33.158025 BTU/ft² |
| 10 Ly | 36.84225 BTU/ft² |
| Langleys (Ly) | BTU per square foot (BTU/ft²) |
|---|---|
| 12 Ly | 44.210701 BTU/ft² |
| 15 Ly | 55.263376 BTU/ft² |
| 20 Ly | 73.684501 BTU/ft² |
| 25 Ly | 92.105626 BTU/ft² |
| 30 Ly | 110.52675 BTU/ft² |
| 40 Ly | 147.369 BTU/ft² |
| 50 Ly | 184.21125 BTU/ft² |
| 75 Ly | 276.31688 BTU/ft² |
| 100 Ly | 368.4225 BTU/ft² |
| 250 Ly | 921.05626 BTU/ft² |
| 500 Ly | 1,842.1125 BTU/ft² |
| 1,000 Ly | 3,684.225 BTU/ft² |
About the units
Langley (Ly)
The langley (Ly) is a unit of heat density. One langley equals 41,840 joules per square meter (J/m²).
BTU per square foot (BTU/ft²)
The BTU per square foot (BTU/ft²) is a unit of heat density in the US customary system. One BTU per square foot equals 11,356.52668 joules per square meter (J/m²).
Frequently asked questions
How many BTU per square foot are in one langley?
There are 3.684225043 BTU per square foot in one langley, and this value is exact by definition.
How do I convert langleys to BTU per square foot?
Multiply the number of langleys by 3.684225043. For example, 10 Ly × 3.684225043 = 36.84225043 BTU/ft².
How many langleys are in one BTU per square foot?
One BTU per square foot equals 0.271427502 langleys. That is the reverse factor, 1 ÷ 3.684225043.
What is 10 langleys in BTU per square foot?
10 Ly = 36.84225043 BTU/ft².
Is this Ly to BTU/ft² converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.