At One Place

40 gal to cup

40 US gallons in US cups
40 gal = 640 cup
cup = gal × 16

40 US gallons is 640 US cups. To get there, multiply by 16.

Values either side

US gallons near 40, converted to US cups.
US gallons US cups
32 gal 512
35 gal 560
36 gal 576
37 gal 592
40 gal ← 640
45 gal 720
50 gal 800
55 gal 880
60 gal 960

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 40 gal in US cups?
40 gal is 640 cup.
How do you convert US gallons to US cups?
Multiply by 16.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked