About MarginKit
MarginKit is a practical calculator toolkit for operators who need clear pricing and inventory decisions quickly, without rebuilding spreadsheets every week.
It was built for importers, resellers, e-commerce sellers, and marketplace teams that manage real SKU-level tradeoffs across cost, margin, and stock risk.
What MarginKit helps with
Faster unit-economics checks, clearer reorder decisions, and more consistent pricing workflows.
Who it is built for
Teams handling supplier costs, shipping, channel fees, promotions, and inventory planning across multiple products.
Why it exists
Many teams outgrow ad-hoc sheets but still need lightweight, reliable tools that keep daily decisions moving.
Workflows
What workflows MarginKit supports
Use focused calculators for the decisions that happen every week in product and operations.
Import costing
Estimate landed cost, per-unit fees, and break-even pricing before placing purchase orders.
Margin and pricing
Model margin impact from shipping, discounts, and supplier changes before campaigns go live.
Inventory planning
Set reorder points, safety stock, and runway checks to reduce stockout and overstock risk.
Marketplace decisions
Use break-even price and ROAS tools to keep channel growth aligned with unit economics.
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Explore tools by category
Jump into import cost, profit margin, inventory planning, or marketplace workflows.