Safety Stock Formula Guide (PDF)

Safety Stock Calculator

Size the buffer that keeps shelves stocked when demand spikes or the truck runs late. Enter a target service level, your demand history, and lead time to get the exact number of units to hold above expected demand. No more guessing with "two extra weeks of supply."

Reorder Point Calculator

Set the trigger level that fires the next PO for an SKU. Reorder point combines expected demand during lead time with a buffer for the weeks that run hot. Get either half wrong and you either stock out or bury cash on the shelf. This calculator returns the ROP, the lead-time demand, the buffer as a percent of expected demand, and the days of supply the ROP represents at current sales velocity.

Inventory Turnover Calculator

Measure how many times a year your average inventory sells through and gets replaced. The single most consequential operational KPI in retail. It connects buying decisions, warehouse cash, markdown risk, and finance targets into one number. This calculator returns the turn ratio, converts it into days and weeks of supply, and shows how much working capital a one-turn improvement releases.

EOQ Calculator

Find the order size that minimizes what you spend keeping an SKU stocked. Small orders push order cost up. Big orders push carrying cost up. EOQ finds the point where the two curves cross so you stop paying more than you have to, and it anchors every reorder point and safety stock decision downstream.

Safety Stock Calculation: The Complete Operator’s Guide

How experienced retail planners actually size safety stock. Two formulas, a Z-score reference table, and the operational habits that keep the number honest.

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Reorder Point Formula: The Operator's Guide to When to Reorder

How buyers and DC planners actually set reorder points. The formula, three what-if scenarios, service-level math by ABC class, continuous vs periodic review, and the four mistakes that turn a good ROP into a stockout machine.

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