Convert btu per hour square foots to watt per square meters
1 BTU/(h·ft²) = 3.15459074506 W/m² — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 9 heat flux density units
- Watt per square meters W/m² 3.154 590 745 06
- Kilowatt per square meters kW/m² 0.003 154 590 745 06
- Watt per square centimeters W/cm² 0.000 315 459 074 506
- BTU per hour square foots BTU/(h·ft²) 1
- BTU per second square foots BTU/(s·ft²) 0.000 277 777 777 778
- Kilocalorie per hour square meters kcal/(h·m²) 2.714 275 019 65
- Calorie per second square centimeters cal/(s·cm²) 0.000 075 396 528 323 7
- Langley per minutes Ly/min 0.004 523 791 699 42
- Solar constants S₀ 0.002 317 847 718 64
Every row is BTU per hour square foot (BTU/(h·ft²)) converted through the watt per square meter, in exact rational arithmetic.
How to convert btu per hour square foots to watt per square meters
Multiply the number of btu per hour square foots by 3.15459074506 to get watt per square meters.
BTU per hour square foot to Watt per square meter conversion table
| BTU per hour square foots (BTU/(h·ft²)) | Watt per square meters (W/m²) |
|---|---|
| 1 BTU/(h·ft²) | 3.154 590 7 |
| 2 BTU/(h·ft²) | 6.309 181 5 |
| 3 BTU/(h·ft²) | 9.463 772 2 |
| 5 BTU/(h·ft²) | 15.772 954 |
| 10 BTU/(h·ft²) | 31.545 907 |
| 20 BTU/(h·ft²) | 63.091 815 |
| 25 BTU/(h·ft²) | 78.864 769 |
| 50 BTU/(h·ft²) | 157.729 54 |
| 100 BTU/(h·ft²) | 315.459 07 |
| 250 BTU/(h·ft²) | 788.647 69 |
| 500 BTU/(h·ft²) | 1577.2954 |
| 1000 BTU/(h·ft²) | 3154.5907 |
Watt per square meter to BTU per hour square foot conversion table
| Watt per square meters (W/m²) | BTU per hour square foots (BTU/(h·ft²)) |
|---|---|
| 1 W/m² | 0.316 998 33 |
| 2 W/m² | 0.633 996 66 |
| 3 W/m² | 0.950 994 99 |
| 5 W/m² | 1.584 991 7 |
| 10 W/m² | 3.169 983 3 |
| 20 W/m² | 6.339 966 6 |
| 25 W/m² | 7.924 958 3 |
| 50 W/m² | 15.849 917 |
| 100 W/m² | 31.699 833 |
| 250 W/m² | 79.249 583 |
| 500 W/m² | 158.499 17 |
| 1000 W/m² | 316.998 33 |
Frequently asked
How many watt per square meters are in a btu per hour square foot?
One btu per hour square foot equals 3.154590745 watt per square meters (BTU/(h·ft²) → W/m²). That figure is exact, not rounded.
How do you convert btu per hour square foots to watt per square meters?
Multiply the number of btu per hour square foots by 3.15459074506 to get watt per square meters.
What is 1 W/m² in btu per hour square foots?
One watt per square meter is 0.3169983306 btu per hour square foots.
What is 10 BTU/(h·ft²) in W/m²?
10 BTU/(h·ft²) = 31.545 907 W/m².