30 lb. Bag Calculator
Current R-Value Calculator
Looking for the 25 lb. Bag Calculator? Click here.
Please use the map and table below to determine the recommended R-Value for your area.
Map Notes:
Zone 1 includes Hawaii, Guam, Puerto Rico, and the Virgin Islands.
All of Alaska is in Zone 7 except for the following Boroughs in Zone 8: Bethel, Dellingham, Fairbanks N. Star, Nome, North Slope, Northwest Arctic, Southeast Fairbanks, Wade Hampton, and Yukon Koyukuk.
| Zone | U.S. DOE Recommended R-Value Range |
| 1 | R-30 to R-49 |
| 2-3 | R-30 to R-60 |
| 4 | R-38 to R-60 |
| 5-8 | R-49 to R-60 |
Bag Calculator
Want to learn more about R-values? Click here.
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