21 mph to kn
21 miles per hour in knots
21 mph = 18.2485 kn
kn = mph × 0.8689762419
21 miles per hour is 18.2485 knots. To get there, multiply by 0.8689762419.
Values either side
| Miles per hour | Knots |
|---|---|
| 17 mph | 14.7726 |
| 18 mph | 15.64157 |
| 19 mph | 16.51055 |
| 20 mph | 17.37952 |
| 21 mph ← | 18.2485 |
| 22 mph | 19.11748 |
| 23 mph | 19.98645 |
| 24 mph | 20.85543 |
| 25 mph | 21.72441 |
How the conversion works
The relationship is kn = mph × 0.8689762419. Both units measure speed, so the conversion is a fixed factor that never changes.
Common questions
- What is 21 mph in knots?
- 21 mph is 18.2485 kn.
- How do you convert miles per hour to knots?
- Multiply by 0.8689762419.
Related pages
- Miles per hour to knots Full table and converter
- 21 kn to mph The other direction
- 17 mph to kn 14.7726 kn
- 18 mph to kn 15.64157 kn
- 19 mph to kn 16.51055 kn
- 20 mph to kn 17.37952 kn
- 22 mph to kn 19.11748 kn
- 23 mph to kn 19.98645 kn
- 24 mph to kn 20.85543 kn
- 25 mph to kn 21.72441 kn
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place