BTU per square foot to Kilojoule per square meter Converter
1 BTU per square foot is about 11.35652668 kilojoules per square meter. Convert BTUs per square foot (BTU/ft²) to kilojoules per square meter (kJ/m²) below: type a value and the result updates as you type.
BTU/ft² to kJ/m² calculator
Result
BTU per square foot to Kilojoule per square meter conversion
1 BTU/ft² ≈ 11.35652668 kJ/m²one BTU per square foot in kilojoules per square meter
1 kJ/m² ≈ 0.08805509184 BTU/ft²one kilojoule per square meter in BTUs per square foot
BTU per square foot (BTU/ft²): One BTU (IT) per square foot.
Kilojoule per square meter (kJ/m²): Exactly 1000 J/m².
Source:BTU per square foot: NIST Special Publication 811 (2008), Appendix B.8; Kilojoule per square meter: SI Brochure, 9th edition (BIPM, 2019)
How to convert BTUs per square foot to kilojoules per square meter
To convert BTUs per square foot to kilojoules per square meter, multiply the number of BTUs per square foot by about 11.35652668.
Formula
kJ/m² = BTU/ft² × 11.35652668
The factor is rounded here. The calculator uses the exact value.
Examples
- 5 BTU/ft² = 5 × 11.35652668 ≈ 56.78263341 kJ/m²
- 25 BTU/ft² = 25 × 11.35652668 ≈ 283.9131671 kJ/m²
- 100 BTU/ft² = 100 × 11.35652668 ≈ 1135.652668 kJ/m²
BTU per square foot to Kilojoule per square meter conversion table
| BTU per square foot (BTU/ft²) | Kilojoule per square meter (kJ/m²) |
|---|---|
| 0.1 BTU/ft² | 1.135652668 kJ/m² |
| 0.5 BTU/ft² | 5.678263341 kJ/m² |
| 1 BTU/ft² | 11.35652668 kJ/m² |
| 2 BTU/ft² | 22.71305336 kJ/m² |
| 3 BTU/ft² | 34.06958005 kJ/m² |
| 5 BTU/ft² | 56.78263341 kJ/m² |
| 10 BTU/ft² | 113.5652668 kJ/m² |
| 20 BTU/ft² | 227.1305336 kJ/m² |
| 25 BTU/ft² | 283.9131671 kJ/m² |
| 50 BTU/ft² | 567.8263341 kJ/m² |
| 100 BTU/ft² | 1135.652668 kJ/m² |
| 250 BTU/ft² | 2839.131671 kJ/m² |
| 500 BTU/ft² | 5678.263341 kJ/m² |
| 1000 BTU/ft² | 11356.52668 kJ/m² |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many kilojoules per square meter are in one BTU per square foot?
- One BTU per square foot is about 11.35652668 kilojoules per square meter.
- How do I convert kilojoules per square meter to BTUs per square foot?
- To convert kilojoules per square meter to BTUs per square foot, multiply the number of kilojoules per square meter by about 0.08805509184. The formula is BTU/ft² = kJ/m² × 0.08805509184.
- Is this conversion exact?
- Yes. Both units have exact definitions, but the factor has more decimal places than can be shown, so displayed results are rounded. The calculator works with 50 significant digits before rounding.
- Which is larger, a BTU per square foot or a kilojoule per square meter?
- A BTU per square foot is about 11.35652668 times larger than a kilojoule per square meter. In other words, a kilojoule per square meter is about 0.08805509184 of a BTU per square foot.