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Travel Time and Arrival Planner
Calculate an arrival instant from distance,average speed,breaks and an explicit-offset departure.
Travel distance (km), Assumed average speed (km/h), Planned breaks (minutes), Departure with explicit offset
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values using the displayed units and explicit assumptions.
- Choose Calculate result and review the complete report and any undefined or no-solution states.
- Choose Download result to save the complete JSON. Reset clears the result and restores example controls.
Examples
Travel distance (km): 350
Assumed average speed (km/h): 90
Planned breaks (minutes): 30
Departure with explicit offset: 2026-10-24T08:00:00+02:00
Limitations
- Nonnegative distance km,break minutes,positive average speed km/h;strict departure YYYY-MM-DDTHH:mm:ssZ or±HH:mm. Dates2000–2099,offset within±14:00. Report UTC arrival and fixed departure-offset arrival;no route,traffic,DST zone rules or live forecast. Elapsed duration<=10years. Arrival is rounded to the nearest millisecond;maximum elapsed duration315576000seconds.
- Scalar controls accept explicit finite decimal syntax;positive values normally1e-12–1e12,nonnegative0–1e12 unless a narrower range is stated. JSON numeric rows use finite IEEE754 values within their stated bounds. Derived counts above1billion and nonfinite results refuse. Combined input<=400000UTF8 bytes;complete JSON<=4MiB. All processing stays in your browser.
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