Drive time plus breaks, delay, and buffer.
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ETA Buffer Calculator
Build a realistic arrival window from miles, speed, delays, breaks, and weather buffer.
Use this whenUse it for dispatch updates when a clean arrival range is better than a fragile exact time.
Arrival window
Build a realistic ETA cushion from miles, speed, breaks, and known delays.
Miles divided by average speed.
Extra cushion added to the plan.
ETA quality
Build a better arrival window
1
Start with realistic average speed, not speed-limit optimism.
2
Add known delays and planned breaks before the percentage buffer.
3
Use a bigger buffer for weather, metro delivery, or appointment uncertainty.
Compliance note
This is not an HOS engine.
Use the result for planning language. Confirm legal drive time with the driver and ELD.