THE NUMBERS, EXPLAINED
How to use this calculator.
Started billing blocks are charged in full from arrival. Extra-pet surcharge is already the combined surcharge for all additional pets.
Start with your inputs
Enter stay duration from arrival to departure (h), billable block duration (h), charge per block, fixed booking extras, additional pet surcharge per block. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Stay duration from arrival to departure (h) | 50 |
| Billable block duration (h) | 24 |
| Charge per block | 30 |
| Fixed booking extras | 15 |
| Additional pet surcharge per block | 10 |
A worked example
With the example inputs above, billable blocks is 3. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Billable blocks | 3 |
| Base boarding charge | 90 |
| Total boarding invoice | 135 |
How this is calculated
Billable blocks
Divide total stay hours by supplied billing block and round up.
Base boarding charge
Multiply billed blocks by base rate.
Total boarding invoice
Add surcharge per block and fixed extras.
Symbols and units
- a
- Stay duration from arrival to departure (h)
- b
- Billable block duration (h)
- c
- Charge per block
- d
- Fixed booking extras
- e
- Additional pet surcharge per block
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
Started billing blocks are charged in full from arrival. Extra-pet surcharge is already the combined surcharge for all additional pets.
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?
Billable blocks; Base boarding charge; Total boarding invoice. 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: Started billing blocks are charged in full from arrival. Extra-pet surcharge is already the combined surcharge for all additional pets.
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: Solve proportions and their applications ↗
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 →