---
title: "18 mL to tsp = 3.651914 tsp"
description: "18 milliliters is 3.651914 teaspoons. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/18-ml-to-teaspoons/
site: "At One Place"
---

# 18 mL to tsp

**18 milliliters in teaspoons: 18 mL = 3.651914 tsp**

tsp = mL × 0.2028841362

18 milliliters is 3.651914 teaspoons. To get there, multiply by 0.2028841362.

## Values either side

*Milliliters near 18, converted to teaspoons.*

| Milliliters | Teaspoons |
| --- | --- |
| 14 mL | 2.840378 |
| 15 mL | 3.043262 |
| 16 mL | 3.246146 |
| 17 mL | 3.44903 |
| 18 mL ← | 3.651914 |
| 19 mL | 3.854799 |
| 20 mL | 4.057683 |
| 21 mL | 4.260567 |
| 22 mL | 4.463451 |

## How the conversion works

The relationship is tsp = mL × 0.2028841362. 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 mL in teaspoons?

18 mL is 3.651914 tsp.

### How do you convert milliliters to teaspoons?

Multiply by 0.2028841362.

## Related pages

- [Milliliters to teaspoons](https://atoneplace.net/convert/ml-to-teaspoons/)
- [18 tsp to mL](https://atoneplace.net/convert/18-teaspoons-to-ml/)
- [14 mL to tsp](https://atoneplace.net/convert/14-ml-to-teaspoons/)
- [15 mL to tsp](https://atoneplace.net/convert/15-ml-to-teaspoons/)
- [16 mL to tsp](https://atoneplace.net/convert/16-ml-to-teaspoons/)
- [17 mL to tsp](https://atoneplace.net/convert/17-ml-to-teaspoons/)
- [19 mL to tsp](https://atoneplace.net/convert/19-ml-to-teaspoons/)
- [20 mL to tsp](https://atoneplace.net/convert/20-ml-to-teaspoons/)
- [21 mL to tsp](https://atoneplace.net/convert/21-ml-to-teaspoons/)
- [22 mL to tsp](https://atoneplace.net/convert/22-ml-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/)