THE NUMBERS, EXPLAINED
How to use this calculator.
One departure with constant per-person cost and no tiered transport costs; excludes tax and overhead not entered.
Start with your inputs
Enter fixed guide cost (currency), fixed transport cost (currency), price per participant (currency), variable cost per participant (currency), available participant capacity. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Fixed guide cost (currency) | 200 |
| Fixed transport cost (currency) | 100 |
| Price per participant (currency) | 50 |
| Variable cost per participant (currency) | 20 |
| Available participant capacity | 12 |
A worked example
With the example inputs above, break-even participants is 10. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Break-even participants | 10 |
| Contribution at capacity (currency) | 60 |
| Capacity can reach break-even | Yes |
How this is calculated
Break-even participants
Divide fixed departure costs by participant contribution and round up.
Contribution at capacity (currency)
Deduct fixed costs from full-capacity contribution.
Capacity can reach break-even
Compare participant capacity with break-even count.
Symbols and units
- a
- Fixed guide cost (currency)
- b
- Fixed transport cost (currency)
- c
- Price per participant (currency)
- d
- Variable cost per participant (currency)
- e
- Available participant capacity
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
One departure with constant per-person cost and no tiered transport costs; excludes tax and overhead not entered.
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?
Break-even participants; Contribution at capacity (currency); Capacity can reach break-even. 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: One departure with constant per-person cost and no tiered transport costs; excludes tax and overhead not entered.
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: Calculate a Break-Even Point in Units and Dollars ↗
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.
Read the quality report →