U Value Calculator: Metric to Imperial
U-value, or thermal transmittance, is a crucial factor in building physics and energy efficiency. It measures how well a building element prevents heat transfer. Our u value calculator from metric to imperial ensures accurate conversions, enhancing your project’s precision.
- Enter the u-value in metric units (W/m²K).
- Click ‘Calculate’.
- View the converted imperial value (BTU/h ft² °F) and chart.
The conversion formula is: Imperial = Metric * 0.17611.
| Material | Metric (W/m²K) | Imperial (BTU/h ft² °F) |
|---|---|---|
| Brick | 0.6 | 0.103 |
| Concrete | 2.5 | 0.431 |
| U-value Range (W/m²K) | Insulation Performance |
|---|---|
| 0.1 – 0.3 | Excellent |
| 0.3 – 0.6 | Good |
- Always round to two decimal places for precision.
- Consider the overall U-value of your building envelope.
What is the difference between U-value and R-value?
U-value measures heat transfer rate, while R-value indicates resistance to heat flow.
How does climate affect U-value?
Colder climates require better insulation, i.e., lower U-values.
Learn more about U-value from the U.S. Department of Energy
Explore thermal conductivity data from Engineering ToolBox