Procurement supplied performance substitution calculator

Calculate ideal substitute quantity and purchase quantity allowing yield with your own figures.

Your numbers

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

Use ideal substitute quantity and purchase quantity allowing yield to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Original material required (kg)
100
Original performance per kg (user units/kg)
2
Substitute performance per kg (same units/kg)
1.5
Substitute process yield (%)
90
Ideal substitute quantity (kg)
133.333333
Purchase quantity allowing yield (kg)
148.148148

Try another scenario

Original material required (kg)
101
Original performance per kg (user units/kg)
2
Substitute performance per kg (same units/kg)
1.5
Substitute process yield (%)
90
Ideal substitute quantity (kg)
134.666667
Purchase quantity allowing yield (kg)
149.62963
Calculation method

Calculation method

Ideal substitute quantity (kg)

Match one user-selected additive performance measure; divide by process yield.

Purchase quantity allowing yield (kg)

Match one user-selected additive performance measure; divide by process yield.

Symbols and units
a
Original material required (kg)
b
Original performance per kg (user units/kg)
c
Substitute performance per kg (same units/kg)
d
Substitute process yield (%)

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

  • Single supplied property equivalence only; does not establish chemical, structural, regulatory or functional interchangeability. 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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