BTUs per Hour-Square Foot to Kilowatts per Square Meter Converter
Enter the heat flux density in btus per hour-square foot below to convert it to kilowatts per square meter.
Convert BTUs per Hour-Square Foot to Kilowatts per Square Meter
Enter a value in btus per hour-square foot (BTU/(h·ft²)) to convert to kilowatts per square meter (kW/m²).
BTU per Hour-Square Foot to Kilowatt per Square Meter Conversion Table
Table showing various btu per hour-square foot measurements converted to kilowatts per square meter. Click any preset value or arrow to load it into the converter.
| BTUs per Hour-Square Foot (BTU/(h·ft²)) | Kilowatts per Square Meter (kW/m²) |
|---|---|
| 1 BTU/(h·ft²) | 0.0031546 kW/m² |
| 2 BTU/(h·ft²) | 0.0063092 kW/m² |
| 2.5 BTU/(h·ft²) | 0.0078865 kW/m² |
| 5 BTU/(h·ft²) | 0.015773 kW/m² |
| 10 BTU/(h·ft²) | 0.0315459 kW/m² |
| 15 BTU/(h·ft²) | 0.0473189 kW/m² |
| 20 BTU/(h·ft²) | 0.0630918 kW/m² |
| 25 BTU/(h·ft²) | 0.0788648 kW/m² |
| 30 BTU/(h·ft²) | 0.0946377 kW/m² |
| 50 BTU/(h·ft²) | 0.1577295 kW/m² |
How to Convert BTUs per Hour-Square Foot to Kilowatts per Square Meter
To convert btus per hour-square foot to kilowatts per square meter, multiply the heat flux density by the following conversion ratio: 0.0031546 kilowatts per square meter/btu per hour-square foot.
Since one btu per hour-square foot is equal to 0.0031546 kilowatts per square meter, you can use this simple formula to convert:
The heat flux density in kilowatts per square meter is equal to the heat flux density in btus per hour-square foot multiplied by 0.0031546.
For example, here's how to convert 5 btus per hour-square foot to kilowatts per square meter using the formula above.
How Many Kilowatts per Square Meter Are in a BTU per Hour-Square Foot?
There are 0.0031546 kilowatts per square meter in a btu per hour-square foot, which is why we use this value in the formula above.
Our btu per hour-square foot to kilowatt per square meter calculator automatically converts your heat flux density measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
BTUs per Hour-Square Foot and kilowatts per square meter are both units used to measure heat flux density. Keep reading to learn more about each unit.
What Is a BTU per Hour-Square Foot?
A btu per hour-square foot is a unit of heat flux density equal to 3.1545908 watts per square meter (W/m²), the base unit for heat flux density. US HVAC heat flux unit (≈ 3.1546 W/m²). [1]
The btu per hour-square foot is classified as a US customary unit of heat flux density. BTUs per Hour-Square Foot can be abbreviated as BTU/(h·ft²); for example, 1 btu per hour-square foot can be written as 1 BTU/(h·ft²).
When working with btus per hour-square foot (BTU/(h·ft²)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, btus per hour-square foot (BTU/(h·ft²)) are widely used across standard heat flux density applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Kilowatt per Square Meter?
A kilowatt per square meter is a unit of heat flux density equal to 1,000 watts per square meter (W/m²), the base unit for heat flux density. Peak solar irradiance benchmark (1 kW/m² = 1,000 W/m²). [2]
The kilowatt per square meter is classified as a metric and SI-compatible unit of heat flux density. Kilowatts per Square Meter can be abbreviated as kW/m²; for example, 1 kilowatt per square meter can be written as 1 kW/m².
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilowatt per square meter (kW/m²) a convenient decimal multiple of the watt per square meter (W/m²).
In practice, kilowatts per square meter (kW/m²) are widely used across large-scale industrial, bulk, and macro-level heat flux density specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting heat flux density between btus per hour-square foot (BTU/(h·ft²)) and kilowatts per square meter (kW/m²), keep full floating-point precision (1 BTU/(h·ft²) = 0.0031546 kW/m²; 1 kW/m² = 316.9983301 BTU/(h·ft²)) during intermediate calculations and round only the final kilowatt per square meter figure to match your instrument tolerance.
More BTU per Hour-Square Foot & Kilowatt per Square Meter Conversions
Need to calculate in the opposite direction? Use our kilowatts per square meter to btus per hour-square foot calculator to switch your starting unit immediately. You can also explore related tools such as converting kilowatts per square meter to btus per hour-square foot, converting watts per square meter to kilowatts per square meter, or converting kilowatts per square meter to watts per square meter.
Convert from BTUs per Hour-Square Foot
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Heat Flux Density Metrology Standard — BTUs per Hour-Square Foot (BTU/(h·ft²)) to Kilowatts per Square Meter (kW/m²)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: BTU per Hour-Square Foot (BTU/(h·ft²)) & Kilowatt per Square Meter (kW/m²)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (BTU/(h·ft²) to kW/m²)