Procurement quantity-break order choice calculator

Calculate candidate order quantity: total cost and minimum-cost candidate order units with your own figures.

Your numbers

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

Choose the currency for these amounts. Changing it keeps your numbers and does not convert exchange rates.

Use candidate order quantity: total cost and minimum-cost candidate order units to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Units actually needed
190
Minimum order quantity
1
All-units price tiers: quantity threshold, unit price $
1,10 200,8
Holding cost per excess unit over chosen horizon ($)
1
Maximum order quantity to consider
500
Candidate order quantity: total cost ($)
190: 1900.00; 200: 1610.00
Minimum-cost candidate order units
200
Excess units above stated need
10
Merchandise cash for chosen order ($)
$1,600.00
Merchandise plus entered holding cost ($)
$1,610.00

Try another scenario

Units actually needed
190
Minimum order quantity
1
All-units price tiers: quantity threshold, unit price $
1,10 200,8
Holding cost per excess unit over chosen horizon ($)
50
Maximum order quantity to consider
500
Candidate order quantity: total cost ($)
190: 1900.00; 200: 2100.00
Minimum-cost candidate order units
190
Excess units above stated need
0
Merchandise cash for chosen order ($)
$1,900.00
Merchandise plus entered holding cost ($)
$1,900.00
Calculation method

Calculation method

Candidate order quantity: total cost ($)

Evaluate max(need,MOQ) and every higher price-break threshold within the maximum; total=all units×applicable tier price+excess units×holding cost.

Minimum-cost candidate order units

Choose minimum total, tie by smaller quantity. With nonnegative unit/holding costs, each tier segment’s minimum lies at its lower feasible endpoint.

Excess units above stated need

Chosen quantity−need.

Merchandise cash for chosen order ($)

Chosen quantity×its all-units tier price.

Merchandise plus entered holding cost ($)

Merchandise+holding on excess units; the holding horizon is implicit in the supplied per-unit amount.

Symbols and units
a
Units actually needed
b
Minimum order quantity
c
All-units price tiers: quantity threshold, unit price $
d
Holding cost per excess unit over chosen horizon ($)
e
Maximum order quantity to consider

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

  • An exact bounded all-units price-break cost comparison, not marginal-tier pricing or a demand forecast. Storage, obsolescence and financing effects must already be represented in the entered holding amount.
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.

Further reading

OECD: procurement performance and contract-record background; calculations follow the displayed rules ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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