Examples
Examples
Try the starting example
- Membership monthly fee (USD/month)
- 10
- Nonmember session fee (USD/session)
- 1
- Member session fee (USD/session)
- 0
- Nonmember energy price (USD/kWh)
- 0.5
- Member energy price (USD/kWh)
- 0.4
- Energy per session (kWh/session)
- 20
- Monthly sessions (count)
- 6
- Saving per session (USD)
- $3.00
- Break-even sessions (count or text)
- 4
- Monthly membership saving (USD)
- $8.00
Try another scenario
- Membership monthly fee (USD/month)
- 12
- Nonmember session fee (USD/session)
- 2
- Member session fee (USD/session)
- 0.5
- Nonmember energy price (USD/kWh)
- 0.6
- Member energy price (USD/kWh)
- 0.45
- Energy per session (kWh/session)
- 10
- Monthly sessions (count)
- 8
- Saving per session (USD)
- $3.00
- Break-even sessions (count or text)
- 5
- Monthly membership saving (USD)
- $12.00
Calculation method
Calculation method
Saving per session (USD)
Nonmember fee−member fee+energy×(nonmember rate−member rate).
Break-even sessions (count or text)
If session saving >0, ceil(monthly fee/saving); otherwise no finite break-even unless monthly fee=0.
Monthly membership saving (USD)
Sessions×session saving−monthly fee.
Symbols and units
- a
- Membership monthly fee (USD/month)
- b
- Nonmember session fee (USD/session)
- c
- Member session fee (USD/session)
- d
- Nonmember energy price (USD/kWh)
- e
- Member energy price (USD/kWh)
- f
- Energy per session (kWh/session)
- g
- Monthly sessions (count)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Repeated identical sessions; equality is break-even, without a minimum membership term. Supported limits: All numeric inputs and computed intermediates must remain finite. Supported numeric input magnitude is zero or 1e-12 through 1e12 in absolute value; reject values outside this bounded range. All lists/JSON record tables are limited to 100 records unless a stricter bound is stated; reject malformed record arity and wrong member types. All numeric values must be finite. Lists contain at most 100 records; required lists must be nonempty. Rates, probabilities and fractions are entered as fractions, not percentages; fractions must be between 0 and 1. Use a single consistent user-selected currency for all amounts; no exchange-rate conversion.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.