Journey time calculator
Journeys are a sum of legs plus everything between them, and it is the everything-between that gets underestimated.
%
Leave at
11:36:00
- Total time to allow
- 2:54:00
- Driving time with traffic
- 1:54:00
- Time in stops
- 30 minutes
- Total minutes
- 174
- Departure is the previous day
- 0
Show the working
- Driving time = 95
- Number of stops = 2
- Minutes per stop = 15
- Traffic allowance = 20
- Arrival buffer = 30
- Must arrive by = 14
- Arrival minute = 30
- travel = 95 * (1 + 20/100) = 114
- Time in stops = 2 * 15 = 30
- Total minutes = 114 + 30 + 30 = 174
- Total time to allow = 174 * 60 = 10 440
- arrival_decimal = 14 + 30/60 = 14.5
- depart_decimal = mod(14.5 - 174/60, 24) = 11.6
- Leave at = 11.6 * 3600 = 41 760
- Departure is the previous day = 14.5 - 174/60 < 0 ? 1 : 0 = 0
- Driving time with traffic = 114 * 60 = 6840
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- total = driving x (1 + traffic) + stops + buffer