Langleys per day to watts per square meter
Type a value in Ly/day to get it in W/m² instantly.
484.6W/m²
That's 4.8× as bright as an overcast day, while hazy sunshine is 1.03× stronger. A two-square-meter panel at 20% would make about 193.8 W.
What it means
How much sun is that?
Panels are rated at 1,000 W/m², called one sun. kWh/m² per day here is averaged over 24 hours, not over daylight only.
The math
How to convert Ly/day to W/m²
To convert langleys per day to watts per square meter, multiply by 0.484583.
Example: 1,000 Ly/day × 0.484583 = 484.583 W/m².
In the other direction, 1 W/m² = 2.06363 Ly/day.
Every unit
Your irradiance in every unit
Tables
Ly/day to W/m² conversion table
| Ly/day | W/m² |
|---|---|
| 50 Ly/day | 24.2292 W/m² |
| 100 Ly/day | 48.4583 W/m² |
| 200 Ly/day | 96.9167 W/m² |
| 400 Ly/day | 193.833 W/m² |
| 600 Ly/day | 290.75 W/m² |
| 800 Ly/day | 387.667 W/m² |
| 1,000 Ly/day | 484.583 W/m² |
| 1,200 Ly/day | 581.5 W/m² |
| 1,361 Ly/day | 659.518 W/m² |
| 1,500 Ly/day | 726.875 W/m² |
W/m² to Ly/day conversion table
| W/m² | Ly/day |
|---|---|
| 50 W/m² | 103.181 Ly/day |
| 100 W/m² | 206.363 Ly/day |
| 200 W/m² | 412.726 Ly/day |
| 400 W/m² | 825.451 Ly/day |
| 600 W/m² | 1,238.18 Ly/day |
| 800 W/m² | 1,650.9 Ly/day |
| 1,000 W/m² | 2,063.63 Ly/day |
| 1,200 W/m² | 2,476.35 Ly/day |
| 1,361 W/m² | 2,808.6 Ly/day |
| 1,500 W/m² | 3,095.44 Ly/day |
Quick answers
Quick answers
- How many W/m² is 1 Ly/day?
- 1 Ly/day is 0.484583 W/m².
- How many W/m² is 10 Ly/day?
- 10 Ly/day is 4.84583 W/m².
- How many W/m² is 1,000 Ly/day?
- 1,000 Ly/day is 484.583 W/m².
The units
About these units
Langleys per day (Ly/day)
A calorie per square centimeter per day, from older climate records.
Watts per square meter (W/m²)
The SI unit of irradiance. Full sun is about 1,000 W/m².
Keep going