THE NUMBERS, EXPLAINED
How to use this calculator.
Task durations and recurrence are entered estimates; assumes flexible work within the week and no deadlines inside that period.
Start with your inputs
Enter weekly task repetitions by client, minutes per task by client, other weekly administration (hours), available working hours per week. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Weekly task repetitions by client | 10,5 |
| Minutes per task by client | 30,60 |
| Other weekly administration (hours) | 2 |
| Available working hours per week | 15 |
A worked example
With the example inputs above, client workload hours is 5, 5. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Client workload hours | 5, 5 |
| Total weekly demand (hours) | 12 |
| Unused weekly capacity (hours) | 3 |
| Weekly overload (hours) | 0 |
How this is calculated
Client workload hours
Multiply recurrence by task minutes.
Total weekly demand (hours)
Add client tasks and administration.
Unused weekly capacity (hours)
Subtract demand from availability, floored at zero.
Weekly overload (hours)
Report demand beyond available time.
Symbols and units
- a
- Weekly task repetitions by client
- b
- Minutes per task by client
- c
- Other weekly administration (hours)
- d
- Available working hours per week
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
Task durations and recurrence are entered estimates; assumes flexible work within the week and no deadlines inside that period.
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?
Client workload hours; Total weekly demand (hours); Unused weekly capacity (hours); Weekly overload (hours). 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: Task durations and recurrence are entered estimates; assumes flexible work within the week and no deadlines inside that period.
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 →