At One Place

21 kn to km/h

21 knots in kilometers per hour
21 kn = 38.892 km/h
km/h = kn × 1.852

21 knots is 38.892 kilometers per hour. To get there, multiply by 1.852.

Values either side

Knots near 21, converted to kilometers per hour.
Knots Kilometers per hour
17 kn 31.484
18 kn 33.336
19 kn 35.188
20 kn 37.04
21 kn ← 38.892
22 kn 40.744
23 kn 42.596
24 kn 44.448
25 kn 46.3

How the conversion works

The relationship is km/h = kn × 1.852. Both units measure speed, so the conversion is a fixed factor that never changes.

Common questions

What is 21 kn in kilometers per hour?
21 kn is 38.892 km/h.
How do you convert knots to kilometers per hour?
Multiply by 1.852.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked