Heat value of firewood by species — green vs. dry weight, million BTU per cord, and BTU per pound.
| Species | Green Weight (lbs. / Cord) | Dry Weight (lbs. / Cord) | Heat per Cord (Million BTUs) | Heat per Dry lb. (BTUs) |
|---|---|---|---|---|
| Apple | 4,850 | 3,888 | 27.0 | 6,944.4 |
| Ash, Green | 4,184 | 2,880 | 20.0 | 6,944.4 |
| Ash, White | 3,952 | 3,472 | 24.2 | 6,970.0 |
| Birch | 4,312 | 2,992 | 20.8 | 6,951.9 |
| Catalpa | 4,560 | 2,360 | 16.4 | 6,949.2 |
| Douglas-fir | 3,319 | 2,970 | 20.7 | 6,969.7 |
| Elm, American | 4,456 | 2,872 | 20.0 | 6,963.8 |
| Fir, White | 3,585 | 2,104 | 14.6 | 6,939.2 |
| Honeylocust | 4,640 | 3,832 | 26.7 | 6,967.6 |
| Locust, Black | 4,616 | 4,016 | 27.9 | 6,947.2 |
| Maple, Other | 4,685 | 3,680 | 25.5 | 6,929.3 |
| Maple, Silver | 3,904 | 2,752 | 19.0 | 6,904.1 |
| Mulberry | 4,712 | 3,712 | 25.8 | 6,950.4 |
| Oak, Bur | 4,960 | 3,768 | 26.2 | 6,953.3 |
| Oak, Red | 4,888 | 3,528 | 24.6 | 6,972.8 |
| Oak, White | 5,573 | 4,200 | 29.1 | 6,928.6 |
| Osage-orange | 5,120 | 4,728 | 32.9 | 6,958.5 |
| Pine, Ponderosa | 3,600 | 2,336 | 16.2 | 6,934.9 |
| Pine, White | 2,250 | 15.9 | 7,066.7 | |
| Redcedar, Eastern | 2,060 | 13.0 | 6,310.7 | |
| Redcedar, Western | 2,950 | 2,632 | 18.2 | 6,914.9 |
| Spruce | 2,800 | 2,240 | 15.5 | 6,919.6 |
| Spruce, Engelmann | 2,070 | 15.0 | 7,246.4 | |
| Sycamore | 5,096 | 2,808 | 19.5 | 6,944.4 |
| Walnut, Black | 4,584 | 3,192 | 22.2 | 6,954.9 |
| Willow | 4,320 | 2,540 | 17.6 | 6,929.1 |
| Average | 4,333 | 3,072 | 21.3 | 6,937.2 |