Use this watts-per-square-meter to btu-per-hour-square-foot converter to change a watt per square meter measurement into its btu per hour square foot equivalent. Enter a number in the calculator above and the result updates instantly.
Heat flux conversions are used for heat transfer, solar loading, furnaces, thermal protection, process equipment, and engineering analysis.
What is a watt per square meter?
Watt per Square Meter (W/m2) is a heat flux unit.
What is a btu per hour square foot?
BTU per Hour Square Foot (BTU/h ft2) is a heat flux unit.
Watts Per Square Meter to Btu Per Hour Square Foot Converter formula
To convert watts per square meter to BTU per hour square foot, use the formula below.
1 BTU/h ft2 = 3.15459075 W/m2. This relationship is the conversion factor used by the calculator.
How to convert watts-per-square-meter to btu-per-hour-square-foot
Start with the watt per square meter value, apply the formula, and round the result only after the calculation is complete.
Example: 10 W/m2 = 3.1699833013 BTU/h ft2.
- 1 W/m2 = 0.3169983301 BTU/h ft2
- 10 W/m2 = 3.1699833013 BTU/h ft2
- 100 W/m2 = 31.6998330132 BTU/h ft2
Manual conversion steps
- Write down the value in watts per square meter.
- Use the conversion formula: BTU per hour square foot = watts per square meter / 3.15459075.
- Calculate the result in BTU per hour square foot.
- Round the answer to the number of decimal places you need.
For quick checking, the converter above performs the same calculation automatically.
Common watts-per-square-meter to btu-per-hour-square-foot use cases
This conversion is useful in practical situations where measurements need to move between different unit systems or audiences.
- Convert watts per square meter to BTU per hour square foot for heat transfer, solar loading, furnaces, thermal protection, and process equipment calculations.
- Heat flux conversions help compare surface heat rates across engineering reports and unit systems.
Common mistakes when converting watts-per-square-meter to btu-per-hour-square-foot
These are the most common issues to watch for when doing this conversion by hand.
- Do not mix up the direction of the conversion. watts-per-square-meter to btu-per-hour-square-foot is not the same as btu-per-hour-square-foot to watts-per-square-meter.
- Avoid rounding too early. Keep the full result during the calculation, then round the final answer.
Watts Per Square Meter to Btu Per Hour Square Foot conversion table
| Watt per Square Meter | BTU per Hour Square Foot |
|---|---|
| 1 W/m2 | 0.3169983301 BTU/h ft2 |
| 5 W/m2 | 1.5849916507 BTU/h ft2 |
| 10 W/m2 | 3.1699833013 BTU/h ft2 |
| 25 W/m2 | 7.9249582533 BTU/h ft2 |
| 50 W/m2 | 15.8499165066 BTU/h ft2 |
| 100 W/m2 | 31.6998330132 BTU/h ft2 |
How to convert btu-per-hour-square-foot to watts-per-square-meter
To reverse the conversion, switch the two units in the calculator or open the reverse conversion page: btu-per-hour-square-foot to watts-per-square-meter.
Reversing the units is useful when you already have a value in BTU per hour square foot and need the equivalent value in watts per square meter.
How to use this watts-per-square-meter to btu-per-hour-square-foot converter
- Enter the number you want to convert in the value field.
- Confirm that the from unit is Watt per Square Meter and the to unit is BTU per Hour Square Foot.
- Read the converted result in the result box.
- Use the copy button if you want to paste the answer elsewhere.
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FAQ
What is the formula for watts-per-square-meter to btu-per-hour-square-foot?
The formula is: BTU per hour square foot = watts per square meter / 3.15459075.
How do I convert watts-per-square-meter to btu-per-hour-square-foot by hand?
Write down the value in watts per square meter, apply the formula, and round the final result in BTU per hour square foot.
How accurate is this converter?
The converter uses standard conversion factors and shows rounded results for readability.
Can I reverse the conversion?
Yes. Use the swap button in the converter or open the related reverse conversion page.
Why do results sometimes have many decimal places?
Some unit conversions do not produce short decimal values. Keep more decimal places for technical work, and round the answer for everyday use.