--- title: "18 tsp to fl oz = 3 fl oz" description: "18 teaspoons is 3 US fluid ounces. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/18-teaspoons-to-fl-oz/ site: "At One Place" --- # 18 tsp to fl oz **18 teaspoons in US fluid ounces: 18 tsp = 3 fl oz** fl oz = tsp × 1/6 18 teaspoons is 3 US fluid ounces. To get there, multiply by 0.1666666667. ## Values either side *Teaspoons near 18, converted to US fluid ounces.* | Teaspoons | US fluid ounces | | --- | --- | | 14 tsp | 2.333333 | | 15 tsp | 2.5 | | 16 tsp | 2.666667 | | 17 tsp | 2.833333 | | 18 tsp ← | 3 | | 19 tsp | 3.166667 | | 20 tsp | 3.333333 | | 21 tsp | 3.5 | | 22 tsp | 3.666667 | ## How the conversion works The relationship is fl oz = tsp × 1/6. 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. ## Common questions ### What is 18 tsp in US fluid ounces? 18 tsp is 3 fl oz. ### How do you convert teaspoons to US fluid ounces? Multiply by 0.1666666667. ## Related pages - [Teaspoons to US fluid ounces](https://atoneplace.net/convert/teaspoons-to-fl-oz/) - [18 fl oz to tsp](https://atoneplace.net/convert/18-fl-oz-to-teaspoons/) - [14 tsp to fl oz](https://atoneplace.net/convert/14-teaspoons-to-fl-oz/) - [15 tsp to fl oz](https://atoneplace.net/convert/15-teaspoons-to-fl-oz/) - [16 tsp to fl oz](https://atoneplace.net/convert/16-teaspoons-to-fl-oz/) - [17 tsp to fl oz](https://atoneplace.net/convert/17-teaspoons-to-fl-oz/) - [19 tsp to fl oz](https://atoneplace.net/convert/19-teaspoons-to-fl-oz/) - [20 tsp to fl oz](https://atoneplace.net/convert/20-teaspoons-to-fl-oz/) - [21 tsp to fl oz](https://atoneplace.net/convert/21-teaspoons-to-fl-oz/) - [22 tsp to fl oz](https://atoneplace.net/convert/22-teaspoons-to-fl-oz/) ## 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/)