The reference platform for supply chain professionals

Every formula, KPI, and calculator your supply chain actually runs on.

Source-cited definitions, worked calculators, and ready-made Excel templates — built from the field's standard references, not blog summaries.

Calculator library

Run the numbers, see the method

Every calculator shows its formula, inputs, and edge-case handling — not just an answer box.

Warehouse Operations Premium

Warehouse Pallet Storage Cube Capacity

Calculate how many pallet positions fit within a given warehouse storage section, using the module method.

Inventory Management Premium

Maister’s Square Root Rule

Estimate how safety stock changes when the number of warehouses in a network changes.

Inventory Management Free

Stock Turn

The simplest, most widely understood inventory performance measure — how many times stock cycles through the warehouse per…

Transportation Free

Freight Transport Carbon Emissions

Calculate greenhouse gas emissions from road freight operations using the distance-based method.

Supply Chain Management Premium

Kanban Circuit Sizing

Calculate how many Kanban cards/containers a pull-replenishment circuit needs.

Financial Logistics Free

ROI and Payback Period

Justify capital investment in new equipment/technology by calculating expected return and time to break even.

KPI library

The metrics that actually run a supply chain

Warehouse Operations Free

Inventory Shrinkage

Items lost/damaged ÷ total items in stock.

Warehouse Operations Free

Inventory Days of Supply

Current total inventory value ÷ (annual COGS ÷ 365).

Warehouse Operations Free

Inventory Count Accuracy

Items in correct location + correct quantity ÷ total locations counted.

Warehouse Operations Free

Inventory Days on Hand

Average inventory value ÷ average daily COGS.

Warehouse Operations Free

Workforce Turnover

Operatives who left during the year ÷ average operatives employed over the year.

Warehouse Operations Free

Near-Miss Reports

Number of near-misses reported per month.