THE NUMBERS, EXPLAINED
How to use this calculator.
Checkpoint distances and cutoff times must strictly increase. Paces are arithmetic segment cutoffs, not training or safety guidance.
Start with your inputs
Enter checkpoint cumulative distances (km), checkpoint cutoff times (minutes from start), planned cumulative arrival times (minutes). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Checkpoint cumulative distances (km) | 5,10 |
| Checkpoint cutoff times (minutes from start) | 40,90 |
| Planned cumulative arrival times (minutes) | 35,80 |
A worked example
With the example inputs above, maximum segment pace between cutoffs (minutes/km) is 8, 10. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Maximum segment pace between cutoffs (minutes/km) | 8, 10 |
| Planned cutoff margins (minutes) | 5, 10 |
How this is calculated
Maximum segment pace between cutoffs (minutes/km)
Divide cutoff time increase by distance increase for each segment.
Planned cutoff margins (minutes)
Subtract planned cumulative arrival from cutoff; negative means late.
Symbols and units
- a
- Checkpoint cumulative distances (km)
- b
- Checkpoint cutoff times (minutes from start)
- c
- Planned cumulative arrival times (minutes)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Checkpoint distances and cutoff times must strictly increase. Paces are arithmetic segment cutoffs, not training or safety guidance.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Maximum segment pace between cutoffs (minutes/km); Planned cutoff margins (minutes). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Checkpoint distances and cutoff times must strictly increase. Paces are arithmetic segment cutoffs, not training or safety guidance.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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