--- title: "400 fl oz to cup = 50 cup" description: "400 US fluid ounces is 50 US cups. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/400-fl-oz-to-cups/ site: "At One Place" --- # 400 fl oz to cup **400 US fluid ounces in US cups: 400 fl oz = 50 cup** cup = fl oz × 1/8 400 US fluid ounces is 50 US cups. To get there, multiply by 0.125. ## Values either side *US fluid ounces near 400, converted to US cups.* | US fluid ounces | US cups | | --- | --- | | 212 fl oz | 26.5 | | 250 fl oz | 31.25 | | 300 fl oz | 37.5 | | 350 fl oz | 43.75 | | 400 fl oz ← | 50 | | 500 fl oz | 62.5 | | 750 fl oz | 93.75 | | 1,000 fl oz | 125 | ## 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 400 fl oz in US cups? 400 fl oz is 50 cup. ### How do you convert US fluid ounces to US cups? Multiply by 0.125. ## Related pages - [US fluid ounces to US cups](https://atoneplace.net/convert/fl-oz-to-cups/) - [400 cup to fl oz](https://atoneplace.net/convert/400-cups-to-fl-oz/) - [212 fl oz to cup](https://atoneplace.net/convert/212-fl-oz-to-cups/) - [250 fl oz to cup](https://atoneplace.net/convert/250-fl-oz-to-cups/) - [300 fl oz to cup](https://atoneplace.net/convert/300-fl-oz-to-cups/) - [350 fl oz to cup](https://atoneplace.net/convert/350-fl-oz-to-cups/) - [500 fl oz to cup](https://atoneplace.net/convert/500-fl-oz-to-cups/) - [750 fl oz to cup](https://atoneplace.net/convert/750-fl-oz-to-cups/) - [1,000 fl oz to cup](https://atoneplace.net/convert/1000-fl-oz-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/)