--- title: "8 gal to cup = 128 cup" description: "8 US gallons is 128 US cups. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/8-gallons-to-cups/ site: "At One Place" --- # 8 gal to cup **8 US gallons in US cups: 8 gal = 128 cup** cup = gal × 16 8 US gallons is 128 US cups. To get there, multiply by 16. ## Values either side *US gallons near 8, converted to US cups.* | US gallons | US cups | | --- | --- | | 4 gal | 64 | | 5 gal | 80 | | 6 gal | 96 | | 7 gal | 112 | | 8 gal ← | 128 | | 9 gal | 144 | | 10 gal | 160 | | 11 gal | 176 | | 12 gal | 192 | ## How the conversion works The relationship is cup = gal × 16. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two. > US gallon: US liquid gallon. The imperial gallon is about 20% larger. > US cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL. ## Common questions ### What is 8 gal in US cups? 8 gal is 128 cup. ### How do you convert US gallons to US cups? Multiply by 16. ## Related pages - [US gallons to US cups](https://atoneplace.net/convert/gallons-to-cups/) - [8 cup to gal](https://atoneplace.net/convert/8-cups-to-gallons/) - [4 gal to cup](https://atoneplace.net/convert/4-gallons-to-cups/) - [5 gal to cup](https://atoneplace.net/convert/5-gallons-to-cups/) - [6 gal to cup](https://atoneplace.net/convert/6-gallons-to-cups/) - [7 gal to cup](https://atoneplace.net/convert/7-gallons-to-cups/) - [9 gal to cup](https://atoneplace.net/convert/9-gallons-to-cups/) - [10 gal to cup](https://atoneplace.net/convert/10-gallons-to-cups/) - [11 gal to cup](https://atoneplace.net/convert/11-gallons-to-cups/) - [12 gal to cup](https://atoneplace.net/convert/12-gallons-to-cups/) ## Sources - Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)] - The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure) - Calculated on this page — At One Place (/about/)