Calculate U-value from R
Calculating U-value from R is crucial in building physics and energy efficiency. U-value represents the overall heat transfer coefficient of a building element, while R-value is the thermal resistance. Understanding how to convert R to U helps in designing energy-efficient structures.
- Enter the R-value and temperature difference.
- Click ‘Calculate’.
- View the U-value and chart below.
The formula to calculate U-value from R is:
U = 1 / (R * t)
where U is the U-value, R is the R-value, and t is the temperature difference.
Case Studies
Comparison of U-values
| Material | R-value | U-value (at 20°C) |
|---|
Expert Tips
- Consider using higher R-values for better insulation.
- Regularly inspect and maintain building envelopes.
- Consult local building codes and standards.
What is the difference between U-value and R-value?
U-value represents the overall heat transfer coefficient, while R-value is the thermal resistance.
U-value definition from U.S. Department of Energy
R-value and U-value explained by Building Science Corporation