Examples
Examples
Try the starting example
- Productive hire hours
- 6
- Idle hire hours
- 2
- Hire charge currency per hour (USD)
- 80
- Running charge currency per productive hour (USD)
- 25
- Productive attributed cost (USD)
- $630.00
- Idle attributed cost (USD)
- $160.00
- Total plant cost (USD)
- $790.00
- Idle fraction of hired hours
- 0.25
Try another scenario
- Productive hire hours
- 6
- Idle hire hours
- 4
- Hire charge currency per hour (USD)
- 80
- Running charge currency per productive hour (USD)
- 25
- Productive attributed cost (USD)
- $630.00
- Idle attributed cost (USD)
- $320.00
- Total plant cost (USD)
- $950.00
- Idle fraction of hired hours
- 0.4
Calculation method
Calculation method
Productive attributed cost (USD)
a*(c+d)
Idle attributed cost (USD)
b*c
Total plant cost (USD)
(a+b)*c+a*d
Idle fraction of hired hours
b/(a+b) if a+b else 0
Symbols and units
- a
- Productive hire hours
- b
- Idle hire hours
- c
- Hire charge currency per hour (USD)
- d
- Running charge currency per productive hour (USD)
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
- Hire cost apportioned by actual time; running charge only productive hours, as supplied. No depreciation or idle emissions model. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
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.