Shopify Inventory Turnover Calculator
Inventory turnover shows whether your Shopify store has too much cash tied up in slow stock or too little to meet demand. Enter cost of goods sold for a period and average inventory value for that same period, plus how many months the period covers. The calculator returns turnover ratio, days to sell inventory, annualized turnover, and an efficiency rating with reorder guidance.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Inventory period
Total COGS for the period, not revenue.
Average value of inventory on hand during the same period.
How many months this COGS period covers.
Results
Live estimates based on your inputs and editable fee assumptions.
Inventory turnover ratio
3
COGS divided by average inventory for the period.
Days to sell inventory
30.44
Average days inventory sits before selling.
Annualized turnover
12
Turnover scaled to 12 months.
Annual days to sell
30.42
Days inventory on hand based on annual turnover.
Efficiency rating
Excellent
How efficient inventory movement is for a Shopify store.
Inventory health
Very fast moving — check stockouts
Quick read on overstock or stockout risk.
Monthly reorder COGS suggestion
$5,000.00
Suggested monthly COGS to maintain current turnover.
What this means
You turned inventory 3.00 times in 3 months, about 30 days to sell. Annualized 12.0 turns / year = ~30 days on hand. Excellent: Very fast moving — check stockouts. Reorder around $5000.00 COGS per month to maintain pace.
Inventory flow
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- COGS for period$15,000.0061.2%
- Average inventory$5,000.0020.4%
- Turnover factor$4,500.0018.4%
Total $24,500.00 · 3 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- COGS for period
- $15,000.00
- Average inventory
- $5,000.00
- Period months
- 3
- Period days
- 91.32
- Turnover ratio (period)
- 3
- Days to sell (period)
- 30.44
- Annualized turnover
- 12
- Annual days to sell
- 30.42
- Monthly reorder COGS
- $5,000.00
Assumptions used
- • Turnover 3.00 = 15000.00 ÷ 5000.00
- • Period days 91.3 = 3 ×30.44
- • Days to sell 30.4 = 91.3 ÷ 3.00
- • Annualized 12.00 = 3.00 ×12 ÷3
Share or export this calculation
Copy your numbers, save as PDF, or share with your team and seller communities.
Continue with related tools
These calculators pair well with Shopify Inventory Turnover and help you get a complete picture.
Stock smarter
Inventory
Calculate reorder point, safety stock, economic order quantity, and carrying costs for your inventory.
Check your margins
Shopify Profit
Estimate your true profit on Shopify after product costs, shipping, packaging, and payment processing fees.
Project your revenue
Shopify Revenue
Project Shopify monthly revenue from average order value, order volume, discounts, refunds, and platform fees.
Project your revenue
Revenue
Project gross, net, and recurring revenue from price, volume, refunds, fees, and subscriptions.
Get more free tools like this
We'll send you new calculators, tips, and updates. No spam, unsubscribe anytime.
Shopify Inventory Turnover Calculator
Generated 7/30/2026, 5:42:42 AM · Currency USD
Inputs
- Cost of goods sold (COGS) for period: 15000
- Average inventory value: 5000
- Period length in months: 3
Results
- COGS for period: $15,000.00
- Average inventory: $5,000.00
- Period months: 3
- Period days: 91.32
- Turnover ratio (period): 3
- Days to sell (period): 30.44
- Annualized turnover: 12
- Annual days to sell: 30.42
- Monthly reorder COGS: $5,000.00
Interpretation
You turned inventory 3.00 times in 3 months, about 30 days to sell. Annualized 12.0 turns / year = ~30 days on hand. Excellent: Very fast moving — check stockouts. Reorder around $5000.00 COGS per month to maintain pace.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Calculate turnover ratio as cogsForPeriod divided by averageInventoryValue.
- 2Calculate period days as periodMonths times 30.44.
- 3Calculate days to sell inventory for the period as periodDays divided by turnover ratio.
- 4Calculate annualized turnover as turnoverRatio times 12 divided by periodMonths.
- 5Calculate annual days to sell as 365 divided by annualized turnover.
- 6Determine efficiency rating: >12 excellent, 6-12 good, 4-6 average, 2-4 slow, <2 very slow for most Shopify categories.
Formulas
- Turnover = COGS ÷ AvgInventory
- PeriodDays = months ×30.44
- DaysToSell = PeriodDays ÷ turnover
- Annual turnover = turnover ×12 ÷ periodMonths
- Annual days to sell = 365 ÷ annualTurnover
Important assumptions
- Turnover ratio = COGS for period divided by average inventory value.
- Days to sell for period = period days divided by turnover ratio.
- Period days = period months times 30.44 average days per month.
- Annualized turnover = turnover ratio × (12 ÷ periodMonths).
- Annual days to sell = 365 ÷ annualized turnover when turnover >0.
- Efficiency rating based on annualized turnover benchmarks for Shopify physical goods.
Worked example
$15k COGS over 3 months with $5k avg inventory
COGS $15,000 for 3 months, average inventory $5,000.
FAQ
Common questions
Related tools
Continue planning
Inventory Calculator
Calculate reorder point, safety stock, economic order quantity, and carrying costs for your inventory.
Shopify Profit Margin Calculator
Estimate your true profit on Shopify after product costs, shipping, packaging, and payment processing fees.
Shopify Revenue Calculator
Project Shopify monthly revenue from average order value, order volume, discounts, refunds, and platform fees.
Revenue Calculator
Project gross, net, and recurring revenue from price, volume, refunds, fees, and subscriptions.
Future recommendations
Tools worth comparing later
This section is reserved for editorial affiliate recommendations. Nothing here is a live endorsement or paid placement yet.
Accounting
Bookkeeping software for product sellers
Track fees, COGS, and payouts in one place.
Link coming later
Email marketing for repeat buyers
Useful after you have a list and offer flow.
Link coming later
Print on demand
POD partners and mockup tools
Compare base costs before you launch designs.
Link coming later
Platform roadmap
Explore More Seller Tools
We are building a complete business decision platform. These planning and forecasting tools are coming next — each will reuse the same transparent, seller-focused framework.
Profit Planner
Set monthly income goals and work backward to required sales, pricing, and margin targets.
Inventory Planner
Calculate reorder points, inventory investment, and stockout risk before you place POs.
Pricing Optimizer
Test pricing scenarios to find the sweet spot between conversion and profit per order.
ROI Planner
Model return on ads, influencer campaigns, and marketplace promotions.
Business Goal Planner
Turn annual revenue goals into daily sales targets, listing counts, and traffic needs.
Sales Forecast
Project next quarter revenue from current average order value and growth assumptions.
Pricing Strategy Tool
Compare charm pricing, premium pricing, and anchor strategies on the same product.
Product Launch Calculator
Budget a new product launch including samples, fees, ads, and break-even timeline.