Closure Order with Rejection Allowance Calculator
Calculate whole closure purchase quantities for a good-unit target and supplier carton multiple.
Use a saved product specification (optional)
Enter your values
First time using this calculator?
Replace the example values with figures from your supplier sheet or measurements. Choose the unit beside each value. Results update as you type; fix any highlighted field before using the result.
GSM means grams per square metre. Net weight excludes the core and other packaging. MOQ means the minimum order quantity. An optional field can stay blank unless the result you need depends on it.
Prices keep the selected currency; changing its label does not convert an exchange rate. Save or export the result after checking your inputs.
Help with good closures required
Enter the usable quantity you actually need. Waste, pack rounding or minimum order effects are added separately where required.
Help with expected closure rejection
Use a measured or supplier-confirmed percentage where possible. Check whether it applies to gross input or finished output; the formula below shows the basis used here.
Closures to purchase
One closure is required per finished unit.
Rejection applies to gross purchased closures, with no replacements.
No separate MOQ or production startup allowance is included.
Cartons = ceil(Good target ÷ (1 − Rejection/100) ÷ Carton quantity)
Inputs: Good closures required = 50000 units; Expected closure rejection = 1 %; Closures per supplier carton = 2000 units. Result: Closures to purchase = 52000 units; Whole cartons = 26 cartons; Expected usable surplus = 1480 units.Saved calculations stay in this browser. No account or cloud backup is created.
Save to a product project (optional)
Choose or create a saved product project ↗This is an illustrative example. Saved or transferred values must be checked against your job.
Calculated from your inputs. Confirm specifications with your supplier.
How sensitive is this result to your assumptions?
Vary one input and inspect closures to purchase
All other entered inputs stay fixed. Ranges are your scenarios, not statistical confidence or supplier performance predictions. This uses the same validated calculator engine.
The formula, made clear.
Adjust the required good closures for rejection, then round up to complete supplier cartons. Report both the purchased quantity and the expected usable surplus.
How to use this calculator
- 01
Enter good closures required, expected closure rejection, closures per supplier carton.
- 02
Use a consistent unit and cost boundary across inputs.
- 03
Review the result, whole-unit rounding and limitations before placing an order.
A calculation you can check
50,000 good closures with 1% rejection and 2,000 per carton require 26 cartons, or 52,000 closures.
- Good closures required
- 50000 units
- Expected closure rejection
- 1 %
- Closures per supplier carton
- 2000 units
Inputs: Good closures required = 50000 units; Expected closure rejection = 1 %; Closures per supplier carton = 2000 units. Result: Closures to purchase = 52000 units; Whole cartons = 26 cartons; Expected usable surplus = 1480 units.Check the displayed formula and units against your quotation. Use measured GSM, net weight and actual layout dimensions where available. Default densities are planning assumptions, not certified material properties. Calculated cost does not certify strength, compatibility or safe loading.
Method, units and material assumptions ↗