Inventory Cover & Reorder Timing
Check on-hand cover and a lead-time reorder point, then size a separate target-fill order using pack multiples and a minimum purchase quantity.
Use inventory cover & reorder timing →CALCULATORS BY INDUSTRY
Ecommerce calculators
Compare order contribution, returns, shipping, acquisition and inventory exposure.
13 free tools. No signup. Methods, examples and source links on every page.
Dimensional Shipping Weight
Calculate a shipment of identical cartons in centimetres and kilograms. Apply your quoted divisor and weight increment to each carton before totaling.
Use dimensional shipping weight →Cash Conversion Cycle
Combine compatible inventory, receivable and payable day estimates. Preserve a negative cash cycle when supplier terms exceed operating days.
Use cash conversion cycle →Inventory Turnover & Days
Calculate turnover and implied holding days using at-cost beginning/end inventory and compatible period COGS.
Use inventory turnover & days →Margin & Markup
Use one cost and selling price to compare unit profit, margin on price and markup on cost.
Use margin & markup →Retail Shrink & Write-offs
Compare recorded and counted inventory at cost. Add only separate losses and estimate their sales-equivalent at an entered contribution margin.
Use retail shrink & write-offs →Product Bundle Contribution
Compare identical item quantities sold separately and as a bundle, including packaging added only to the bundle.
Use product bundle contribution →Promotion Discount & Required Volume
Calculate the whole promotional units sufficient to preserve baseline contribution after discounting every sale and paying a fixed campaign cost.
Use promotion discount & required volume →Stockout Contribution Exposure
Estimate demand exposed during a stockout, the share never recovered, and contribution at risk after avoided variable costs.
Use stockout contribution exposure →Order Contribution After Fulfillment
Combine discounted goods and charged shipping, then deduct products, pick-and-pack, delivery and your payment-fee assumptions.
Use order contribution after fulfillment →Returns & Refund Profitability
Model a batch of orders with partial or full refunds, return handling and your own inventory and processing-fee recovery assumptions.
Use returns & refund profitability →Supplier Quantity Discount Decision
Compare purchase cash, holding costs and ending inventory value for two orders that cover the same entered use.
Use supplier quantity discount decision →Free Shipping Threshold Scenario
Find a sufficient basket under an entered product contribution rate after payment, shipping and packaging costs.
Use free shipping threshold scenario →Before you use these calculations
Include fulfillment and payment costs without repeating them in other categories.
Match order counts, returns and customer costs to a compatible cohort.
Use actual package dimensions and carrier rounding rules for shipping comparisons.
Start with the example, replace the assumptions with your measurements, then change one input to see its effect. Save or export the scenario if you need to keep its basis.
How Case calculators are built and checked →Read practical calculation guides or browse another industry.