This calculator adds your trip duration directly to your departure time, converting the result into a readable clock time for your estimated arrival.
Arrival Time Calculator
Estimated arrival time from a departure time and trip duration.
What the Arrival Time Calculator Covers
This calculator covers arrival time estimates for any trip with a known departure time and duration — road trips, flights, train journeys, or any scheduled travel where you know how long the trip will take.
This is useful for planning connections, letting someone know when to expect you, or simply checking what time you’ll arrive somewhere based on when you leave and how long the trip takes.
How Arrival Time Is Calculated
Formula
Arrival Time = Departure Time + Trip Duration
Where:
- Departure Time = the time you leave, in 24-hour decimal format
- Trip Duration = how long the trip takes, in hours
Worked Example
A departure at 9:00 AM (9.0), with a trip duration of 3 hours 30 minutes (3.5 hours).
Arrival Time = 9.0 + 3.5 = 12.5, which is 12:30 PM
Leaving at 9:00 AM for a 3.5-hour trip puts your estimated arrival at 12:30 PM.
Handling Trips That Cross Midnight
If a trip’s duration pushes the arrival time past 24.0, that result represents a time on the following calendar day — for example, an arrival time calculated as 26.0 corresponds to 2:00 AM the next day.
Frequently Asked Questions
Does this account for time zone changes during travel?
No — this calculator adds duration to departure time within a single time zone. For a trip that crosses time zones, such as a flight, calculate your arrival in the departure zone first, then convert that result to the destination zone’s local time separately.
How do I account for a layover or stop along the way?
Add the layover or stop duration directly into your total trip duration before calculating, or calculate each leg of the trip separately and chain the results together.
What if my trip duration includes a range, like “3 to 4 hours”?
Calculate the arrival time separately for both the low and high end of the duration range to see the full window of possible arrival times, rather than relying on a single midpoint estimate.
Does traffic or delay get factored in automatically?
No — this calculator works from the trip duration you provide. If you expect delays, add a buffer to your estimated trip duration before entering it for a more realistic arrival estimate.
How do I calculate arrival time for a multi-leg trip with connections?
Calculate the arrival time for the first leg, then use that result as the departure time for the next leg (adding any layover time), repeating for each remaining leg of the trip.
Can I use this to work backward from a required arrival time?
Yes — subtract your trip duration from your required arrival time instead of adding it to a departure time, which tells you the latest time you need to leave.
How precise is a trip duration estimate for driving versus flying?
A flight’s scheduled duration is typically a fairly reliable planning figure, while a driving duration can vary more with traffic, so consider adding extra buffer time for road trips compared to scheduled flights.
