Convert Firkins to Oil Barrels
Convert Firkins (fir) to Oil Barrels (bbl) instantly and accurately.
Conversion Formula
bbl = fir × 0.2142857143
About Firkins
A firkin (fir) ≈ 34.07 L (9 US gallons) - the most common cask for British real-ale delivery (9 imperial gallons = 40.91 L). A busy pub cellar cycles through several firkins per week. Craft breweries stage 'firkin tappings' of limited experimental ales. The name comes from Middle Dutch 'vierdekijn' (little fourth), as a firkin was one quarter of a barrel. 1 fir = 9 US gal ≈ 34.07 L.
About Oil Barrels
An oil barrel (bbl) = exactly 42 US gallons ≈ 158.99 L - established by the Pennsylvania oil industry in the 1860s and now the global petroleum standard. Global oil production, OPEC quotas, and crude spot prices are all quoted in barrels or Mb/d (millions of barrels per day); world consumption ~100 Mb/d in 2024. 'Bbl' derives from the 'blue barrel' mark on petroleum containers. 1 bbl = 42 US gal ≈ 159 L.
Quick Reference Table
| Firkins (fir) | Oil Barrels (bbl) |
|---|---|
| 1 fir | 0.214286 bbl |
| 2 fir | 0.428571 bbl |
| 5 fir | 1.07143 bbl |
| 10 fir | 2.14286 bbl |
| 25 fir | 5.35714 bbl |
| 50 fir | 10.7143 bbl |
| 100 fir | 21.4286 bbl |