Measuring Altitude
Feet vs. Meters
1foot = 304.8mm
Distance Across The Ground
World-wide, the nautical mile (nm) is the standard for measuring the distance an aircraft travels across the ground. That’s nice and easy (and it makes it easy to remember!)
1nm = 1.852 Kilometers
Wind speed
Knots vs. Meters/Second
1 m/s ≈ 2 kts