Definition
The process of expressing a number of minutes as a decimal fraction of an hour, so that time values can be used directly in flight planning calculations involving fuel burn, groundspeed, and distance. Minutes are converted by dividing the number of minutes by 60. For example, 30 minutes equals 0.5 hour, and 45 minutes equals 0.75 hour.
Plain English
Turning minutes into a decimal part of an hour by dividing the minutes by 60, so the number works in normal math. 30 minutes becomes 0.5, 15 minutes becomes 0.25, and so on.
Context Anchor
Seen in flight planning when calculating flight time, fuel needed, distance, or any other value that uses hours instead of minutes.
Why Pilots Care
Prevents small time errors from accumulating into inaccurate totals for flight duration, fuel, or ETAs.
Grounding Statement
Thirty minutes is half of one hour, so in a per-hour calculation it must be used as 0.5 hours, not as 30.
Intuition Check
Do not write minutes as if they were already hours. 45 minutes is 0.75 hours, not 0.45 hours.
Example Sentence 1
The leg is planned for 1 hour 15 minutes, so I convert that to 1.25 hours before multiplying by my fuel burn rate.
Example Sentence 2
Converting minutes to equivalent hours before fuel planning gave a more precise estimate of consumption for the route.