Stock Expiry Allocation calculator.
Exclude out-of-date batches before assigning compatible stock to a planned phase.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Eligible stock is assigned by earliest entered expiry date. Entries use one common quantity basis; product compatibility and actual condition must be checked separately.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Required compatible stock units
- 10
- Planned use day from reference
- 5
- Compatible stock units
- 8
- Last eligible day from reference
- 4
- Compatible stock units
- 6
- Last eligible day from reference
- 10
Units still required: 4
Use dates and eligible shelf life come from your product and storage records. The tool does not certify that a product remains usable; expiry-day stock is eligible under this explicit model.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Eligible stock is assigned by earliest entered expiry date. Entries use one common quantity basis; product compatibility and actual condition must be checked separately.
Dimensions, quantities, prices, timing and product properties are supplied by you. This tool does not select construction specifications or assess structural, electrical or hydraulic suitability.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.