BTUs per Hour-Square Foot to Watts per Square Inch Converter
Enter the heat flux density in btus per hour-square foot below to convert it to watts per square inch.
Convert BTUs per Hour-Square Foot to Watts per Square Inch
Enter a value in btus per hour-square foot (BTU/(h·ft²)) to convert to watts per square inch (W/in²).
BTU per Hour-Square Foot to Watt per Square Inch Conversion Table
Table showing various btu per hour-square foot measurements converted to watts per square inch. Click any preset value or arrow to load it into the converter.
| BTUs per Hour-Square Foot (BTU/(h·ft²)) | Watts per Square Inch (W/in²) |
|---|---|
| 1 BTU/(h·ft²) | 0.0020352 W/in² |
| 2 BTU/(h·ft²) | 0.0040704 W/in² |
| 2.5 BTU/(h·ft²) | 0.005088 W/in² |
| 5 BTU/(h·ft²) | 0.0101761 W/in² |
| 10 BTU/(h·ft²) | 0.0203522 W/in² |
| 15 BTU/(h·ft²) | 0.0305282 W/in² |
| 20 BTU/(h·ft²) | 0.0407043 W/in² |
| 25 BTU/(h·ft²) | 0.0508804 W/in² |
| 30 BTU/(h·ft²) | 0.0610565 W/in² |
| 50 BTU/(h·ft²) | 0.1017608 W/in² |
How to Convert BTUs per Hour-Square Foot to Watts per Square Inch
To convert btus per hour-square foot to watts per square inch, multiply the heat flux density by the following conversion ratio: 0.0020352 watts per square inch/btu per hour-square foot.
Since one btu per hour-square foot is equal to 0.0020352 watts per square inch, you can use this simple formula to convert:
The heat flux density in watts per square inch is equal to the heat flux density in btus per hour-square foot multiplied by 0.0020352.
For example, here's how to convert 5 btus per hour-square foot to watts per square inch using the formula above.
How Many Watts per Square Inch Are in a BTU per Hour-Square Foot?
There are 0.0020352 watts per square inch 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 watt per square inch 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 watts per square inch 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 Watt per Square Inch?
A watt per square inch is a unit of heat flux density equal to 1,550.0031 watts per square meter (W/m²), the base unit for heat flux density. Heater element surface watt density unit (≈ 1,550 W/m²). [2]
The watt per square inch is classified as a US customary unit of heat flux density. Watts per Square Inch can be abbreviated as W/in²; for example, 1 watt per square inch can be written as 1 W/in².
When working with watts per square inch (W/in²) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, watts per square inch (W/in²) are widely used across large-scale industrial, bulk, and macro-level heat flux density specifications within US customary workflows, engineering documentation, and technical data sheets.
When converting heat flux density between btus per hour-square foot (BTU/(h·ft²)) and watts per square inch (W/in²), keep full floating-point precision (1 BTU/(h·ft²) = 0.0020352 W/in²; 1 W/in² = 491.3483944 BTU/(h·ft²)) during intermediate calculations and round only the final watt per square inch figure to match your instrument tolerance.
More BTU per Hour-Square Foot & Watt per Square Inch Conversions
Need to calculate in the opposite direction? Use our watts per square inch to btus per hour-square foot calculator to switch your starting unit immediately. You can also explore related tools such as converting watts per square inch to btus per hour-square foot, converting watts per square meter to watts per square inch, or converting watts per square meter to kilowatts 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 Watts per Square Inch (W/in²)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: BTU per Hour-Square Foot (BTU/(h·ft²)) & Watt per Square Inch (W/in²)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (BTU/(h·ft²) to W/in²)