Block Time Calculator
Calculate elapsed block time from departure and arrival times.
Calculator
Result
About this calculator
Aviation operations commonly use UTC. This calculator uses the time and offset you enter; it does not determine a geographic time zone.
How to use this calculator
What to enter
Enter or select the following as requested: Departure time (UTC, HH:MM); Arrival time (UTC, HH:MM). Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The aviation result is an estimate based on the aircraft, route, weight, speed, wind, fuel, or performance values entered. Check units, aircraft-specific performance data, atmospheric assumptions, and whether reserve, taxi, climb, descent, and regulatory factors are included.
When to use it
Use this for educational or preliminary flight planning only. Never substitute a general calculator for the aircraft flight manual, approved performance charts, current weather, official procedures, or a pilot’s operational judgment.