Days of supply calculator

Days of supply tells you how long your current stock will last at the current rate of demand. Too few days risks a stockout. Too many locks up capital in slow-moving inventory.

What is days of supply?

Days of supply (DOS), also called days on hand or inventory days, is a measure of how much inventory coverage you have. It answers the question: "If we received no new stock today, how many days until we run out?"

Target DOS varies significantly by industry. High-volume consumer goods may target 10–20 days. Engineered-to-order manufacturers may carry 30–60 days due to long supplier lead times.

Days of supply formula

Formula
Days of Supply = On-Hand Inventory ÷ Avg Daily Demand
On-Hand Inventory: current stock in units
Avg Daily Demand: mean units consumed per day
Result: days of inventory coverage remaining

Typical targets by industry

Electronics / Tech15–30 days
Automotive5–15 days
FMCG / Consumer goods10–30 days
Aerospace / Defence30–90 days

Now put these numbers to work.

Taktora is built for manufacturers who want to hit their takt time, close the OEE gap, and stop losing capacity to manual scheduling. See what it does for your floor.

What Taktora connects to your numbers

Real-time OEE tracking from the factory floor

Takt-time-aware production scheduling

AI agent that re-sequences when reality shifts

Cycle time measurement via machine vision

Days of Supply Calculator: Inventory Health Formula | Taktora.AI