PRIOR PROPER PLANNING · 7 P's
For non-linear sections (cone bottom, top dome) use the official tank strap chart, not this calc.
Formula: SG = 141.5 / (131.5 + API). At 60°F reference.
1 US oil barrel = 42 US gallons.
| From | To | Multiply By |
|---|---|---|
| Barrels (oil) | Gallons (US) | 42 |
| Gallons (US) | Liters | 3.7854 |
| Cubic feet | Barrels | 0.17811 |
| Inches | Centimeters | 2.540 |
| Feet | Meters | 0.3048 |
| °F | °C | (F − 32) ÷ 1.8 |
| °C | °F | (C × 1.8) + 32 |
| PSI | kPa | 6.8948 |
| 8ths | Fraction | Decimal in |
|---|---|---|
| 0 | 0 | 0.000 |
| 1 | 1/8 | 0.125 |
| 2 | 1/4 | 0.250 |
| 3 | 3/8 | 0.375 |
| 4 | 1/2 | 0.500 |
| 5 | 5/8 | 0.625 |
| 6 | 3/4 | 0.750 |
| 7 | 7/8 | 0.875 |
| Item | Value |
|---|---|
| Water density (60°F) | 8.337 lb/gal |
| API water reference | 10.0° API (SG 1.000) |
| Standard temp (oil) | 60°F |
| Atmospheric pressure | 14.696 PSI |
| Hydrostatic gradient (water) | 0.433 PSI/ft |
| Hydrostatic gradient (typ. crude) | ~0.36–0.40 PSI/ft |