Unit Conversions

Question 1

Between feet and metres.

Answer 1

1ft = 0.3048m
1m = 3.28ft

Rule of thumb:
m = ft/3 -10% (approx)
ft = m x 3 + 10% (approx)

Question 2

Between NM and km

Answer 2

1NM = 1.852km
1km = 0.54NM

Rule of thumb:
NM = km/2 + 10% (approx)
km = NM x 2 - 10% (approx)

Question 3

Between km and NM to feet

Answer 3

1 NM = 6076ft

1km = 3280ft

Question 4

Between Knots and km/h

Answer 4

1 knot = 1852km/h
1km/h = 0.54kts

Use same rule of thumb as NM to km and vice versa.

Question 5

Between m/s and feet per minute (fpm)

Answer 5

1 m/s = 3.28m/s = 197fpm
1fpm = 0.005m/s

Rule of thumb:
m/s = fpm/200 (approx)
fpm=m/s x 200 (approx)

Question 6

Between litres and US gallons

Answer 6

1l = 0.26US GAL
1 US GAL = 3.8l

Rule of thumb:
US GAL = litres/4 +5% (approx)
Litres = US GAL x 4 - 5% (approx)

Question 7

Imperial gallons in Litres

Answer 7

1 IMP GAL = 4.5l

Question 8

Between kg and lbs

Answer 8

1kg = 2.2lb
1lb = 0.45kg

Rule of thumb:
lb = kg x 2 + 10%
kg = lb/2 -10%