ETA Arrival Time Calculator

Work out eta arrival time instantly with clear inputs, formula shown and shareable results.

About ETA Arrival Time Calculator

Estimated arrival is departure plus distance over speed plus expected delays. Showing the delay-free arrival alongside makes the cost of congestion explicit, and using the modulo of 24 handles journeys that cross midnight.

Formula

ETA

arrival = departure + distance / average speed + delays

Worked example

With the default values below, ETA Arrival Time Calculator returns Estimated arrival (24h clock) of 11.93. Change any input above and every figure here is recalculated in your browser.

Inputs used

Departure time (24h): 8.5 h
Distance remaining: 265 km
Average speed: 88 km/h
Expected delays: 25 min

Results

Estimated arrival (24h clock): 11.93 h
Journey time: 3.43 h
Arrival without delays (24h): 11.51 h
Minutes remaining: 206 min

Step by step

1Values used
2ETA
3Estimated arrival (24h clock)= 11.93 h
4Journey time= 3.43 h
5Arrival without delays (24h)= 11.51 h
6Minutes remaining= 206 min

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why do satnav ETAs drift?

They assume free-flowing traffic at the posted limit unless live data says otherwise, and they cannot predict your break stops.

Should I plan on the optimistic or pessimistic figure?

Plan on the delayed figure and communicate that. Arriving early is always easier to handle than arriving late.