Gallons to Fluid Ounces
1 gal = 128 fluid ounces. Multiply gallons by 128 to get fluid ounces; divide fluid ounces by 128 to go back.
Gallons to fluid ounces conversion table
How to convert gallons to fluid ounces
Step 1
Take the value in gallons.
10 gal
Step 2
Multiply by 128.
10 × 128
Step 3
Round to the precision you need.
= 1,280 floz
The factor is rounded to six significant digits; the copy button on any result gives the full-precision value.
Common gallons to fluid ounces conversions
1 gal → 128 floz 2 gal → 256 floz 3 gal → 384 floz 4 gal → 512 floz 5 gal → 640 floz 6 gal → 768 floz 7 gal → 896 floz 8 gal → 1,024 floz 9 gal → 1,152 floz 10 gal → 1,280 floz 11 gal → 1,408 floz 12 gal → 1,536 floz 13 gal → 1,664 floz 14 gal → 1,792 floz 15 gal → 1,920 floz 16 gal → 2,048 floz 17 gal → 2,176 floz 18 gal → 2,304 floz 19 gal → 2,432 floz 20 gal → 2,560 floz 21 gal → 2,688 floz 22 gal → 2,816 floz 23 gal → 2,944 floz 24 gal → 3,072 floz
These are the values people actually search for. Any other number works in the converter above; only these pages are listed for search engines.
Frequently asked questions
How many fluid ounces are in a gal?
There are 128 fluid ounces in one gal. Going the other way, one floz is 0.0078125 gallons.
How do I convert gallons to fluid ounces?
Multiply the number of gallons by 128. For example, 10 gal × 128 = 1,280 floz.
What is 5 gallons in fluid ounces?
5 gallons is 640 fluid ounces.
What is 100 gallons in fluid ounces?
100 gallons is 12,800 fluid ounces.