Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ft³ | 0.000178108 bbl | |
| 0.01 ft³ | 0.00178108 bbl | |
| 0.1 ft³ | 0.0178108 bbl | |
| 1 ft³ | 0.178108 bbl | |
| 5 ft³ | 0.890538 bbl | |
| 10 ft³ | 1.78108 bbl | |
| 50 ft³ | 8.90538 bbl | |
| 100 ft³ | 17.8108 bbl | |
| 1000 ft³ | 178.108 bbl |
Common cubic foot values converted to oil barrel — factor: 1 ft³ = 0.1781 bbl
| Cubic Foot (ft³) | Oil Barrel (bbl) | Context |
|---|---|---|
| 0.01 ft³ | 0.001781 bbl | — |
| 0.1 ft³ | 0.01781 bbl | — |
| 0.5 ft³ | 0.08905 bbl | — |
| 1 ft³ | 0.1781 bbl | — |
| 2 ft³ | 0.3562 bbl | — |
| 5 ft³ | 0.8905 bbl | — |
| 10 ft³ | 1.781 bbl | — |
| 27 ft³ | 4.809 bbl | — |
| 50 ft³ | 8.905 bbl | — |
| 100 ft³ | 17.81 bbl | — |
| 200 ft³ | 35.62 bbl | — |
| 500 ft³ | 89.05 bbl | — |
| 1,000 ft³ | 178.1 bbl | — |
| 5,000 ft³ | 890.5 bbl | — |
| 1e+04 ft³ | 1,781 bbl | — |
Converting cubic foot to oil barrel comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using oil barrel, or a laboratory protocol may specify volumes in cubic foot that need to be measured with equipment calibrated in oil barrel.
In everyday use, knowing that 5 ft³ = 0.8905 bbl and 10 ft³ = 1.781 bbl covers most common situations. For bulk calculations, 100 ft³ = 17.81 bbl is a useful anchor. The reverse conversion — oil barrel back to cubic foot — uses the factor 5.615, so 1 bbl = 5.615 ft³.
All conversions use the internationally recognized factor of exactly 1 ft³ = 0.1781 bbl. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Oil Barrel = Cubic Foot × 0.17810764
Multiply any cubic foot value by 0.17810764 to get oil barrel. One cubic foot equals 0.17810764 bbl.
Reverse: Cubic Foot = Oil Barrel × 5.6145822
1 ft³ = 0.17810764 bbl. Memorize this for instant mental estimates.
Use 0.1781 as a quick mental factor. Multiply your cubic feet value by this to estimate oil barrels.
To verify: multiply your result by 5.6145822 to recover the original ft³ value.
Sizes ductwork and fan capacities using CFM (cubic feet per minute).
Records natural gas consumption displayed in cubic feet on residential meters.
Estimates shipment volume in cubic feet to quote truck size and cargo weight.
Orders ready-mix in cubic yards (27 ft³) and converts smaller pours to cubic feet.
Measures timber volume in cubic feet for lumber yield and valuation.
Calculates pool volume in cubic feet to size filtration systems.
The cubic foot is the Imperial and US customary volume unit equal to the space occupied by a cube with one-foot sides. It was formally standardized in the UK by the Weights and Measures Act of 1824.
Cubic feet appear in HVAC (airflow in CFM), natural gas billing in the US, and real-estate appraisals. One cubic foot equals exactly 1,728 cubic inches or approximately 28.317 liters.
Interesting fact: US natural gas meters read in CCF (hundreds of cubic feet) or MCF (thousands), making the cubic foot the invisible unit behind most American gas utility bills.
The US oil barrel (bbl) is defined as exactly 42 US gallons, equal to 158.987 liters. The 42-gallon standard was adopted by the Pennsylvania oil industry in 1866, based on the wine tierce barrel.
Oil barrels are the global benchmark for crude oil pricing: NYMEX WTI and ICE Brent futures are quoted in USD per barrel. OPEC quotas and national reserves are all expressed in barrels per day.
Interesting fact: No physical barrels are used to ship crude oil today. The unit is purely a pricing and accounting convention; tankers carry millions of barrels in sealed tanks.