Aviation Unit Conversion

Use these quick aviation converters to translate between common flight-planning units. Enter a value on either side and the equivalent figure will update instantly.

This aviation unit conversion calculator centralizes speed, distance, altitude, fuel, pressure and temperature tools so pilots can validate performance data, optimise flight planning and communicate accurate numbers with their crews.

Speed & Distance

Compare knots, kilometers per hour and typical route distances in nautical or statute miles.

kn
↔
km/h
NM
↔
mi
NM/min
↔
kn
Sample speed and distance conversions
Example Conversion result
100 knots 185.2 kilometers per hour
200 kilometers per hour 107.9 knots
1 nautical mile 1.1508 statute miles
3 NM per minute 180 knots
100 statute miles 86.9 nautical miles

Altitude & Vertical Speed

Translate altitude references, flight levels and climb gradients between the units pilots and controllers use most often.

ft
↔
m
ft
↔
FL
ft/NM
↔
%
fpm
↔
m/s
Sample altitude and climb conversions
Example Conversion result
10,000 feet 3,048 meters
3,000 meters 9,843 feet
Flight level 350 35,000 feet
300 feet per nautical mile 4.94% climb gradient
6% climb gradient 364.6 feet per nautical mile
1,500 feet per minute 7.6 meters per second
5 meters per second 984 feet per minute

Fuel & Weight

Convert fuel volumes, mass and engine thrust units used in performance and weight-and-balance planning.

lb
↔
kg
lb
↔
gal
lbf
↔
N
kg
↔
slug
kg
↔
st
Sample fuel and weight conversions
Example Conversion result
1,000 pounds 453.6 kilograms
500 kilograms 1,102.3 pounds
5,000 pounds (Jet-A) 746 gallons (Jet-A)
1,000 gallons (Jet-A) 6,700 pounds
20,000 pounds-force 88,964 newtons
100,000 newtons 22,480 pounds-force
500 kilograms 34.3 slugs
20 slugs 291.9 kilograms
90 kilograms 14.17 stone
12 stone 76.2 kilograms
10 cubic meters 353.15 cubic feet
500 cubic feet 14.16 cubic meters

Fuel Efficiency

Assess fuel economy across nautical, metric and automotive measures to compare aircraft and ground references.

gal
↔
L
L
↔
gal (Imp)
nm/g
↔
km/L
km/L
↔
mpg
Sample fuel efficiency conversions
Example Conversion result
3.5 NM per gallon 1.71 km per liter
0.8 km per liter 1.64 NM per gallon
15 km per liter 35.3 miles per gallon
25 miles per gallon 10.6 km per liter
50 US gallons 189.3 liters
200 liters 52.8 US gallons
100 liters 21.99 imperial gallons
30 imperial gallons 136.4 liters

Pressure

Quick conversions for altimeter settings and hydraulic or tire pressures between imperial and metric scales.

psi
↔
bar
inHg
↔
hPa
Sample pressure conversions
Example Conversion result
30.12 inHg 1,020 hectopascals
1,013 hectopascals 29.92 inHg
2,900 psi 200 bar
50 bar 725.2 psi
500 psi 34.5 bar

Temperature

Move between Celsius, Fahrenheit and Kelvin when calculating ISA deviations or performance adjustments.

Sample temperature conversions
Example Conversion result
15 °C 59 °F / 288.15 K
-40 °C -40 °F / 233.15 K
100 °F 37.8 °C / 310.93 K
300 K 26.85 °C / 80.33 °F
212 °F 100 °C / 373.15 K