--- title: "30 fl oz to cup = 3.75 cup" description: "30 US fluid ounces is 3.75 US cups. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/30-fl-oz-to-cups/ site: "At One Place" --- # 30 fl oz to cup **30 US fluid ounces in US cups: 30 fl oz = 3.75 cup** cup = fl oz × 1/8 30 US fluid ounces is 3.75 US cups. To get there, multiply by 0.125. ## Values either side *US fluid ounces near 30, converted to US cups.* | US fluid ounces | US cups | | --- | --- | | 26 fl oz | 3.25 | | 27 fl oz | 3.375 | | 28 fl oz | 3.5 | | 29 fl oz | 3.625 | | 30 fl oz ← | 3.75 | | 32 fl oz | 4 | | 35 fl oz | 4.375 | | 36 fl oz | 4.5 | | 37 fl oz | 4.625 | ## 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 30 fl oz in US cups? 30 fl oz is 3.75 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/) - [30 cup to fl oz](https://atoneplace.net/convert/30-cups-to-fl-oz/) - [26 fl oz to cup](https://atoneplace.net/convert/26-fl-oz-to-cups/) - [27 fl oz to cup](https://atoneplace.net/convert/27-fl-oz-to-cups/) - [28 fl oz to cup](https://atoneplace.net/convert/28-fl-oz-to-cups/) - [29 fl oz to cup](https://atoneplace.net/convert/29-fl-oz-to-cups/) - [32 fl oz to cup](https://atoneplace.net/convert/32-fl-oz-to-cups/) - [35 fl oz to cup](https://atoneplace.net/convert/35-fl-oz-to-cups/) - [36 fl oz to cup](https://atoneplace.net/convert/36-fl-oz-to-cups/) - [37 fl oz to cup](https://atoneplace.net/convert/37-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/)