--- title: "13 fl oz to cup = 1.625 cup" description: "13 US fluid ounces is 1.625 US cups. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/13-fl-oz-to-cups/ site: "At One Place" --- # 13 fl oz to cup **13 US fluid ounces in US cups: 13 fl oz = 1.625 cup** cup = fl oz × 1/8 13 US fluid ounces is 1.625 US cups. To get there, multiply by 0.125. ## Values either side *US fluid ounces near 13, converted to US cups.* | US fluid ounces | US cups | | --- | --- | | 9 fl oz | 1.125 | | 10 fl oz | 1.25 | | 11 fl oz | 1.375 | | 12 fl oz | 1.5 | | 13 fl oz ← | 1.625 | | 14 fl oz | 1.75 | | 15 fl oz | 1.875 | | 16 fl oz | 2 | | 17 fl oz | 2.125 | ## 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 13 fl oz in US cups? 13 fl oz is 1.625 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/) - [13 cup to fl oz](https://atoneplace.net/convert/13-cups-to-fl-oz/) - [9 fl oz to cup](https://atoneplace.net/convert/9-fl-oz-to-cups/) - [10 fl oz to cup](https://atoneplace.net/convert/10-fl-oz-to-cups/) - [11 fl oz to cup](https://atoneplace.net/convert/11-fl-oz-to-cups/) - [12 fl oz to cup](https://atoneplace.net/convert/12-fl-oz-to-cups/) - [14 fl oz to cup](https://atoneplace.net/convert/14-fl-oz-to-cups/) - [15 fl oz to cup](https://atoneplace.net/convert/15-fl-oz-to-cups/) - [16 fl oz to cup](https://atoneplace.net/convert/16-fl-oz-to-cups/) - [17 fl oz to cup](https://atoneplace.net/convert/17-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/)