---
title: "15 fl oz to tsp = 90 tsp"
description: "15 US fluid ounces is 90 teaspoons. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/15-fl-oz-to-teaspoons/
site: "At One Place"
---

# 15 fl oz to tsp

**15 US fluid ounces in teaspoons: 15 fl oz = 90 tsp**

tsp = fl oz × 6

15 US fluid ounces is 90 teaspoons. To get there, multiply by 6.

## Values either side

*US fluid ounces near 15, converted to teaspoons.*

| US fluid ounces | Teaspoons |
| --- | --- |
| 11 fl oz | 66 |
| 12 fl oz | 72 |
| 13 fl oz | 78 |
| 14 fl oz | 84 |
| 15 fl oz ← | 90 |
| 16 fl oz | 96 |
| 17 fl oz | 102 |
| 18 fl oz | 108 |
| 19 fl oz | 114 |

## How the conversion works

The relationship is tsp = fl oz × 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 15 fl oz in teaspoons?

15 fl oz is 90 tsp.

### How do you convert US fluid ounces to teaspoons?

Multiply by 6.

## Related pages

- [US fluid ounces to teaspoons](https://atoneplace.net/convert/fl-oz-to-teaspoons/)
- [15 tsp to fl oz](https://atoneplace.net/convert/15-teaspoons-to-fl-oz/)
- [11 fl oz to tsp](https://atoneplace.net/convert/11-fl-oz-to-teaspoons/)
- [12 fl oz to tsp](https://atoneplace.net/convert/12-fl-oz-to-teaspoons/)
- [13 fl oz to tsp](https://atoneplace.net/convert/13-fl-oz-to-teaspoons/)
- [14 fl oz to tsp](https://atoneplace.net/convert/14-fl-oz-to-teaspoons/)
- [16 fl oz to tsp](https://atoneplace.net/convert/16-fl-oz-to-teaspoons/)
- [17 fl oz to tsp](https://atoneplace.net/convert/17-fl-oz-to-teaspoons/)
- [18 fl oz to tsp](https://atoneplace.net/convert/18-fl-oz-to-teaspoons/)
- [19 fl oz to tsp](https://atoneplace.net/convert/19-fl-oz-to-teaspoons/)

## 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/)