Route escape-point timing calculator

Calculate modeled ready-for-departure timestamp by option and departure deadline minus modeled ready time with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use modeled ready-for-departure timestamp by option and departure deadline minus modeled ready time to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Options: ID, supplied walking minutes to exit, transfer minutes, fixed departure deadline
E1,60,30,2026-10-20T10:40 E2,100,20,2026-10-20T10:45
Current fixed-offset timestamp
2026-10-20T09:00
Modeled ready-for-departure timestamp by option
E1: 2026-10-20T10:30; E2: 2026-10-20T11:00
Departure deadline minus modeled ready time (minutes)
E1: 10; E2: -15
Options meeting their supplied departure deadline
E1
Earliest modeled ready option(s)
E1

Try another scenario

Options: ID, supplied walking minutes to exit, transfer minutes, fixed departure deadline
E1,60,30,2026-10-20T10:40 E2,100,20,2026-10-20T10:45
Current fixed-offset timestamp
2026-10-20T09:15
Modeled ready-for-departure timestamp by option
E1: 2026-10-20T10:45; E2: 2026-10-20T11:15
Departure deadline minus modeled ready time (minutes)
E1: -5; E2: -30
Options meeting their supplied departure deadline
None
Earliest modeled ready option(s)
E1
Calculation method

Calculation method

Modeled ready-for-departure timestamp by option

Current time+supplied walking minutes+transfer minutes.

Departure deadline minus modeled ready time (minutes)

Signed deadline−ready.

Options meeting their supplied departure deadline

Ready≤deadline under the supplied fixed-duration scenario.

Earliest modeled ready option(s)

Compare modeled ready times, retaining ties, without inferring real route conditions.

Symbols and units
a
Options: ID, supplied walking minutes to exit, transfer minutes, fixed departure deadline
b
Current fixed-offset timestamp

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • A supplied fixed-duration exit/transport scenario, not navigation or an emergency escape assurance. Timetables, walking conditions, route access and response availability are not fetched or verified.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

OpenStax: ratios and rates; all itinerary rates, limits and scenario rules are supplied inputs ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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