Heat Transfer
kBTU/(hr·ft²)tokW/m²
Convert kilo-British thermal units per hour-square foot (kBTU/(hr·ft²)) to kilowatts per square metre (kW/m²).
Factor1 kBTU/(hr·ft²) = 3.154591 kW/m²
Converter
kBTU/(hr·ft²)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kW/m²
Rendered to 6 significant figures.
Formula
Formula
kW/m² = kBTU/(hr·ft²) × 3.154591
Multiply any value in kilo-British thermal units per hour-square foot by 3.154591 to obtain the value in kilowatts per square metre.
Worked example
Convert 10 kBTU/(hr·ft²) to kW/m².
- 01Start with 10 kBTU/(hr·ft²).
- 02Multiply by the conversion factor: 10 × 3.154591 = 31.5459 kW/m².
Result10 kBTU/(hr·ft²) = 31.5459 kW/m²
Conversion table
| kBTU/(hr·ft²) | kW/m² |
|---|---|
| 1 | 3.1546 |
| 2 | 6.3092 |
| 5 | 15.773 |
| 10 | 31.546 |
| 20 | 63.092 |
| 50 | 157.73 |
| 100 | 315.46 |
| 200 | 630.92 |
| 500 | 1577.3 |
| 1000 | 3154.6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kBTU/(hr·ft²) to kW/m²?
1 kBTU/(hr·ft²) equals 3.154591 kW/m². To convert, multiply the value in kilo-British thermal units per hour-square foot by 3.154591.
How do I convert 1 kBTU/(hr·ft²) to kW/m²?
1 kBTU/(hr·ft²) = 3.15459 kW/m². For any value, multiply by 3.154591.
How do I convert kW/m² back to kBTU/(hr·ft²)?
Divide by the same factor — or equivalently, multiply by 0.3169983. So 1 kW/m² = 0.316998 kBTU/(hr·ft²).
When would I need to convert kilo-British thermal unit per hour-square foot to kilowatt per square metre?
Heat-flux conversions between kBTU/(hr·ft²) and kW/m² appear in radiative-heat-transfer analysis, furnace and reactor design, electronics cooling, and solar-energy calculations. W/m² is the SI standard; BTU/(hr·ft²) and kcal/(hr·m²) appear in US and legacy European datasheets.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).
Related conversions
- kW/m² → kBTU/(hr·ft²)kilowatt per square metre → kilo-British thermal unit per hour-square foot
- W/m² → kW/m²watt per square metre → kilowatt per square metre
- kW/m² → W/m²kilowatt per square metre → watt per square metre
- BTU/(hr·ft²) → kW/m²British thermal unit per hour-square foot → kilowatt per square metre
- kW/m² → BTU/(hr·ft²)kilowatt per square metre → British thermal unit per hour-square foot
- kW/m² → MW/m²kilowatt per square metre → megawatt per square metre