---
title: "18 kn to mph = 20.71403 mph"
description: "18 knots is 20.71403 miles per hour. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/18-knots-to-mph/
site: "At One Place"
---

# 18 kn to mph

**18 knots in miles per hour: 18 kn = 20.71403 mph**

mph = kn × 1.150779448

18 knots is 20.71403 miles per hour. To get there, multiply by 1.150779448.

## Values either side

*Knots near 18, converted to miles per hour.*

| Knots | Miles per hour |
| --- | --- |
| 14 kn | 16.11091 |
| 15 kn | 17.26169 |
| 16 kn | 18.41247 |
| 17 kn | 19.56325 |
| 18 kn ← | 20.71403 |
| 19 kn | 21.86481 |
| 20 kn | 23.01559 |
| 21 kn | 24.16637 |
| 22 kn | 25.31715 |

## How the conversion works

The relationship is mph = kn × 1.150779448. Both units measure speed, so the conversion is a fixed factor that never changes.

## Common questions

### What is 18 kn in miles per hour?

18 kn is 20.71403 mph.

### How do you convert knots to miles per hour?

Multiply by 1.150779448.

## Related pages

- [Knots to miles per hour](https://atoneplace.net/convert/knots-to-mph/)
- [18 mph to kn](https://atoneplace.net/convert/18-mph-to-knots/)
- [14 kn to mph](https://atoneplace.net/convert/14-knots-to-mph/)
- [15 kn to mph](https://atoneplace.net/convert/15-knots-to-mph/)
- [16 kn to mph](https://atoneplace.net/convert/16-knots-to-mph/)
- [17 kn to mph](https://atoneplace.net/convert/17-knots-to-mph/)
- [19 kn to mph](https://atoneplace.net/convert/19-knots-to-mph/)
- [20 kn to mph](https://atoneplace.net/convert/20-knots-to-mph/)
- [21 kn to mph](https://atoneplace.net/convert/21-knots-to-mph/)
- [22 kn to mph](https://atoneplace.net/convert/22-knots-to-mph/)

## 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/)