Examples
Examples
Try the starting example
- Edges to tape (metres)
- 80
- Fixture perimeter allowance (metres)
- 20
- Masking film area (square metres)
- 40
- User waste fraction
- 0.1
- Tape roll length (metres)
- 50
- Film roll area (square metres)
- 25
- Whole tape rolls (count)
- 3
- Whole film rolls (count)
- 2
- Required tape length (metres)
- 110
Try another scenario
- Edges to tape (metres)
- 100
- Fixture perimeter allowance (metres)
- 30
- Masking film area (square metres)
- 55
- User waste fraction
- 0.15
- Tape roll length (metres)
- 40
- Film roll area (square metres)
- 30
- Whole tape rolls (count)
- 4
- Whole film rolls (count)
- 3
- Required tape length (metres)
- 149.5
Calculation method
Calculation method
Whole tape rolls (count)
ceil((edges+fixture allowance)×(1+waste)/roll length).
Whole film rolls (count)
ceil(area×(1+waste)/film roll area).
Required tape length (metres)
(edges+fixture allowance)×(1+waste).
Symbols and units
- a
- Edges to tape (metres)
- b
- Fixture perimeter allowance (metres)
- c
- Masking film area (square metres)
- d
- User waste fraction
- e
- Tape roll length (metres)
- f
- Film roll area (square metres)
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
- Measured edge length and masking area purchase arithmetic; dimensions and overlaps supplied by user. 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.