Convert Firkins to Gallons
Convert Firkins (fir) to Gallons (gal) instantly and accurately.
Conversion Formula
gal = fir × 9
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 Gallons
A US gallon (gal) = 4 quarts = 128 fl oz ≈ 3.785 L. Gasoline, milk, water, paint, and pesticides are sold by the gallon in the US. About 20% smaller than the UK imperial gallon (4.546 L) - a critical difference when comparing fuel economy across the Atlantic. 1 US gal = 3.785 L = 4 qt = 128 fl oz.
Quick Reference Table
| Firkins (fir) | Gallons (gal) |
|---|---|
| 1 fir | 9 gal |
| 2 fir | 18 gal |
| 5 fir | 45 gal |
| 10 fir | 90 gal |
| 25 fir | 225 gal |
| 50 fir | 450 gal |
| 100 fir | 900 gal |