Plumbing fitting-adjusted spool lengths calculator

Calculate cut pipe lengths and total cut length with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use cut pipe lengths and total cut length to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Required finished spool lengths (mm)
1000,800,1200
Fitting takeouts per spool (mm)
80,60,100
Cut allowance per spool (mm)
3
Cut pipe lengths (JSON)
[923,743,1103]
Total cut length (mm)
2769

Try another scenario

Required finished spool lengths (mm)
[1001, 800, 1200]
Fitting takeouts per spool (mm)
[80, 60, 100]
Cut allowance per spool (mm)
3
Cut pipe lengths (JSON)
[924,743,1103]
Total cut length (mm)
2770
Calculation method

Calculation method

Cut pipe lengths (JSON)

Cut length = finished length − combined fitting takeout + entered cut allowance.

Total cut length (mm)

Cut length = finished length − combined fitting takeout + entered cut allowance.

Symbols and units
a
Required finished spool lengths (mm)
b
Fitting takeouts per spool (mm)
c
Cut allowance per spool (mm)

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

  • User-supplied measurements and assumptions; Cut length = finished length − combined fitting takeout + entered cut allowance. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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