ConvBolt — Unit ConverterUS gallons to US cups Converter
Converting US gallons to US cups is a multiplication by a fixed factor: 1 gal = 16 cup. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one us gallon works out to 16 cup, the us cup is the noticeably larger unit of the two: a figure given in us cup always carries a larger number than the same measurement in us gallon. A chart drawn in gal can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in US cups but you are dosing in US gallons, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 16 cup per us gallon (0 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 gal a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.0625 gal per cup, the exact reciprocal, so a round trip through both pages returns your original number.
US gallons to US cups formula
Use this formula to convert any us gallon value to US cups:
Worked example: 100 gal × 16 = 1600 cup.
US gallons to US cups conversion table
| US gallons (gal) | US cups (cup) |
|---|---|
| 0.5 gal | 8 cup |
| 1 gal | 16 cup |
| 2 gal | 32 cup |
| 5 gal | 80 cup |
| 10 gal | 160 cup |
| 20 gal | 320 cup |
| 50 gal | 800 cup |
| 100 gal | 1600 cup |
| 500 gal | 8000 cup |
| 1000 gal | 16000 cup |
How to convert US gallons to US cups
Multiply the us gallon value by 16 to get the equivalent in US cups. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the US cups to US gallons converter instead of dividing by hand; both pages use the same source factors. For every other gal conversion in one place, see the gal conversion hub.
Frequently asked questions
How many US cups are in 1 us gallon?
1 us gallon = 16 cup.
What is 100 US gallons in US cups?
100 gal = 1600 cup.
Is converting US gallons to US cups the same as US cups to US gallons?
No — the direction changes the multiplier. The reverse conversion (1 cup = 0.0625 gal) is on the US cups to US gallons page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.