Convert Fluid Ounce to Barrel (fl oz → bbl)

Converting fluid ounces to barrels is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in fluid ounces

   Start with the number of fluid ounces (fl oz) you want to convert.
2. 2
   Multiply by 0.000186

   The conversion factor from fl oz to bbl is 0.000186. Multiply your value by this number.
3. 3
   Read the result in barrels

   The result is your value in barrels (bbl).

Multiply the value in fluid ounces by 0.000186. For the reverse direction, multiply by 5,376.

• ✓1 US fl oz ≈ 29.6 ml; 1 UK fl oz ≈ 28.4 ml.
• ✓8 US fl oz ≈ 1 US cup ≈ 237 ml.
• ✓Use ml to avoid ambiguity between US and UK fluid ounces.

• ✗Mixing US and UK fluid ounces — 16 fl oz (US) = 473 ml vs. 16 fl oz (UK) = 455 ml.
• ✗Confusing fluid ounce (volume) with avoirdupois ounce (mass).
• ✗Assuming 1 fl oz = 1 oz by weight — only true for pure water and approximately.

What is the Fluid Ounce?

The US fluid ounce equals exactly 29.5735295625 milliliters and is the standard small-volume unit for beverages, cocktails, personal-care products, and cooking in the United States. It is distinct from the (weight) ounce: 1 fluid ounce of water weighs about 1 ounce by weight at room temperature, but other liquids may weigh more or less. Soft-drink cans (12 fl oz), beer bottles (12 fl oz), shampoo bottles, and skin-cream tubs all label volume in fluid ounces. The US fluid ounce is slightly different from the UK imperial fluid ounce (28.4131 mL — about 4% smaller), reflecting the different gallon definitions. The US fl oz relates to the gallon (128 fl oz = 1 gal), the cup (8 fl oz = 1 cup), the tablespoon (2 tbsp = 1 fl oz), and the milliliter (1 fl oz ≈ 29.57 mL). Cocktail recipes universally use fluid ounces.

• US beverage and soda can sizes (12 fl oz)
• Cosmetic and personal-care product volumes
• US fluid recipes and cocktail measures

What is the Barrel?

The oil barrel equals exactly 42 US gallons (158.987 liters) and is the global benchmark unit for crude oil pricing and trading. The 42-gallon size dates to the 1860s Pennsylvania oil boom, when oil was shipped in repurposed wooden barrels of various sizes; the standard settled at 42 gallons as a practical industry compromise. Today, the oil barrel is virtually synonymous with crude oil — Brent crude and WTI prices are quoted per barrel ($/bbl), OPEC tracks production in barrels per day, and proven reserves are listed in billions of barrels. Despite metrication, the barrel persists in petroleum trading and journalism worldwide. It relates to the US gallon (1 bbl = 42 US gal), the cubic meter (1 bbl ≈ 0.159 m³), and the liter (1 bbl ≈ 159 L). Note that beer and wine barrels have different volumes.

• Crude oil international pricing (Brent, WTI)
• Petroleum product reporting (OPEC, EIA)
• Energy-sector financial reporting