At One Place

40 fl oz to cup

40 US fluid ounces in US cups
40 fl oz = 5 cup
cup = fl oz × 1/8

40 US fluid ounces is 5 US cups. To get there, multiply by 0.125.

Values either side

US fluid ounces near 40, converted to US cups.
US fluid ounces US cups
32 fl oz 4
35 fl oz 4.375
36 fl oz 4.5
37 fl oz 4.625
40 fl oz ← 5
45 fl oz 5.625
50 fl oz 6.25
55 fl oz 6.875
60 fl oz 7.5

How the conversion works

The relationship is cup = fl oz × 1/8. 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 cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.

Common questions

What is 40 fl oz in US cups?
40 fl oz is 5 cup.
How do you convert US fluid ounces to US cups?
Multiply by 0.125.

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