Angle of Repose of Various Materials
Here is a list of various materials and their angle of repose. All measurements are approximated and not exact.
| Material (condition) | Angle of Repose (degrees) |
|---|---|
| Ashes | 40° |
| Asphalt (crushed) | 30–45° |
| Bark (wood refuse) | 45° |
| Bran | 30–45° |
| Chalk | 45° |
| Clay (dry lump) | 25–40° |
| Clay (wet excavated) | 15° |
| Clover seed | 28° |
| Coconut (shredded) | 45° |
| Coffee bean (fresh) | 35–45° |
| Earth | 30–45° |
| Flour (wheat) | 45° |
| Granite | 35–40° |
| Gravel (loose dry) | 30–45° |
| Gravel (natural w/ sand) | 25–30° |
| Malt | 30–45° |
| Sand (dry) | 34° |
| Sand (water filled) | 15–30° |
| Sand (wet) | 45° |
| Snow | 38° |
| Wheat | 28° |
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“So much symmetry!
Like the pale angle of time
And eternity.
The great shape labored and fell.”
—N. Scott Momaday (b. 1934)
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—Friedrich Nietzsche (1844–1900)
“The repose of sleep refreshes only the body. It rarely sets the soul at rest. The repose of the night does not belong to us. It is not the possession of our being. Sleep opens within us an inn for phantoms. In the morning we must sweep out the shadows.”
—Gaston Bachelard (1884–1962)
“Though the hen should sit all day, she could lay only one egg, and, besides, would not have picked up materials for another.”
—Henry David Thoreau (1817–1862)