Convert Gallons to Fluid Drams
Convert Gallons (gal) to Fluid Drams (fl dr) instantly and accurately.
Conversion Formula
fl dr = gal × 1024
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.
About Fluid Drams
A fluid dram (fl dr, also 'drachm') = 1/8 fl oz ≈ 3.697 mL. Used by apothecaries for precise medicinal compounding; a fluid dram divided into 60 minims. Largely superseded by millilitres but still appears in traditional compounding recipes, older US pharmacopeias, and historical medical literature. 1 fl dr ≈ 3.697 mL.
Quick Reference Table
| Gallons (gal) | Fluid Drams (fl dr) |
|---|---|
| 1 gal | 1024 fl dr |
| 2 gal | 2048 fl dr |
| 5 gal | 5120 fl dr |
| 10 gal | 10240 fl dr |
| 25 gal | 25600 fl dr |
| 50 gal | 51200 fl dr |
| 100 gal | 102400 fl dr |