THE NUMBERS, EXPLAINED
How to use this calculator.
Aggregate compatibility audit assuming seats can be reassigned; does not claim actual free outlets without seating-location data.
Start with your inputs
Enter total cafe seats, outlet-equipped seats, current seated customers, customers requiring an outlet. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Total cafe seats | 40 |
| Outlet-equipped seats | 12 |
| Current seated customers | 30 |
| Customers requiring an outlet | 18 |
A worked example
With the example inputs above, outlet seat shortage is 6. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Outlet seat shortage | 6 |
| Total vacant seats | 10 |
| Outlet provision (%) | 30 |
How this is calculated
Outlet seat shortage
Compare outlet demand with outlet-equipped seats.
Total vacant seats
Subtract seated customers from all seats.
Outlet provision (%)
Express outlet-equipped seats as a share of all seats.
Symbols and units
- a
- Total cafe seats
- b
- Outlet-equipped seats
- c
- Current seated customers
- d
- Customers requiring an outlet
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
Aggregate compatibility audit assuming seats can be reassigned; does not claim actual free outlets without seating-location data.
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?
Outlet seat shortage; Total vacant seats; Outlet provision (%). 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: Aggregate compatibility audit assuming seats can be reassigned; does not claim actual free outlets without seating-location data.
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: Describe and Identify Cost Drivers ↗
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 →