Travel Time Calculator
Estimate how long a trip takes from distance and realistic average speed, with an optional arrival time.
Estimate travel time from distance and average speed instantly. Free online travel time calculator with arrival time and unit conversion.
Calculator Inputs
About Travel Time
Estimate how long a trip takes from distance and realistic average speed, with an optional arrival time.
Travel time is simply distance divided by average speed — but units and reality complicate it. This calculator normalizes kilometers/miles and km/h/mph/m/s automatically, then divides to get the duration.
Use a realistic average, not the speed limit: traffic, stops, and terrain usually cut 10–20% off. Add an optional departure time to get the arrival clock time, including next-day rollover.
All math runs in your browser.
Where it is used
Road-trip planning, delivery ETAs, commute estimates, and pacing long drives with realistic (not speed-limit) averages.
How to use the Travel Time
- Distance — enter the value (e.g. 300).
- Distance Unit — enter the value.
- Average Speed — enter the value (e.g. 80).
- Speed Unit — enter the value.
- Departure Time HH:MM (optional) — enter the value (e.g. 08:30).
- Calculate — press the Calculate button to see the result instantly above.
Formula
Time = Distance / Average speed (units normalized to km and km/h first).
Examples
Example
Frequently Asked Questions
- Should I use the speed limit as average speed?
- No — real averages run lower because of traffic, signals, and stops. Subtract roughly 10–20% from the limit for a believable estimate.
- Does it account for breaks?
- Not automatically. Add your planned stop minutes to the departure math, or lower the average speed to absorb them.
- Miles and mph together — any conversion needed?
- No. Matching imperial units divide out cleanly; the tool only converts when distance and speed units differ.