BTU per Hour per Square Foot to Watts per Square Meter Converter
Convert BTU/(ft²·h) to W/m² instantly. 1 BTU/(ft²·h) = 3.154590745 W/m².
Conversion Formula
W/m² = BTU/(ft²·h) × 3.154590745
Example
25 BTU/(ft²·h) × 3.154590745 = 78.86476863 W/m²
Convert the other way: Watts per Square Meter to BTU per Hour per Square Foot →
BTU per Hour per Square Foot to Watts per Square Meter Conversion Table
| BTU per Hour per Square Foot (BTU/(ft²·h)) | Watts per Square Meter (W/m²) |
|---|---|
| 0.1 | 0.3154590745 |
| 0.5 | 1.577295373 |
| 1 | 3.154590745 |
| 2 | 6.30918149 |
| 5 | 15.77295373 |
| 10 | 31.54590745 |
| 20 | 63.0918149 |
| 25 | 78.86476863 |
| 50 | 157.7295373 |
| 100 | 315.4590745 |
| 500 | 1,577.295373 |
| 1,000 | 3,154.590745 |
About These Units
- BTU per Hour per Square Foot (BTU/(ft²·h))
- A US customary unit of heat flux, one British thermal unit per hour through each square foot, about 3.1546 W/m². It is used in American building, furnace, and heat exchanger calculations.
- Watts per Square Meter (W/m²)
- The SI unit of heat flux and irradiance, one watt passing through each square meter. Solar panel ratings assume 1,000 W/m² of sunlight, and building and climate science calculations use it throughout.
Frequently Asked Questions
How many W/m² are in 1 BTU/(ft²·h)?
1 BTU/(ft²·h) equals 3.154590745 W/m².
How do I convert BTU per Hour per Square Foot to Watts per Square Meter?
Multiply your BTU per Hour per Square Foot value by 3.154590745. For example, 25 BTU/(ft²·h) × 3.154590745 = 78.86476863 W/m².
How many BTU/(ft²·h) are in 1 W/m²?
1 W/m² equals 0.3169983306 BTU/(ft²·h).