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    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.

    Best for

    Make the next pricing or planning decision with context

    Decide how much stock or cash to commit by testing demand, reorder, and carrying-cost assumptions. It covers Measure how fast your Shopify inventory sells and how long stock sits before turning into cash.

    Instant calculations · Editable fee assumptions · Export-ready results

    Inputs

    Values update results instantly. Adjust fee assumptions to match your seller dashboard.

    Your figures are saved in this browser on this device.

    Inventory period

    USD

    Total COGS for the period, not revenue.

    USD

    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.

    61%20%18%

    Distribution

    • COGS for period
      $15,000.00
      61.2%
    • Average inventory
      $5,000.00
      20.4%
    • Turnover factor
      $4,500.00
      18.4%

    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

    Recommended next step

    Put this result to work

    These suggestions follow the decision behind this calculator, so you can review a practical next move without losing the assumptions you just tested.

    Amazon recommendations

    Build a more repeatable inventory workflow

    A quick stock check and consistent labels make inventory values, reorder plans, and Amazon prep assumptions easier to verify.

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    01
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    NETUM C750 Bluetooth Barcode Scanner

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    Use it when: You need a quick way to identify stock items during receiving, counting, or reorder checks.

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    02
    Seller supply

    Thermal Label Printer

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    Use it when: FBM sellers and shops printing several labels in a packing session

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    Result ready

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    Shopify Inventory Turnover Calculator

    Generated 9/10/2026, 8:12:10 PM · 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

    How the Shopify Inventory Turnover Calculator works

    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

    1. 1Calculate turnover ratio as cogsForPeriod divided by averageInventoryValue.
    2. 2Calculate period days as periodMonths times 30.44.
    3. 3Calculate days to sell inventory for the period as periodDays divided by turnover ratio.
    4. 4Calculate annualized turnover as turnoverRatio times 12 divided by periodMonths.
    5. 5Calculate annual days to sell as 365 divided by annualized turnover.
    6. 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.

    Sources & review

    Know what this estimate is built on

    Use these official references to locate the policy, plan, or help details behind the editable inputs.

    Calculator model reviewed: August 9, 2026

    Use the current terms

    These official references are starting points for published policies, pricing, or help. They do not validate every default in this calculator. Rates, plans, eligibility, regions, and account terms can change, so compare the editable fields with your account before relying on the result.

    Defaults are editable estimates. Match them to your current account, provider statement, official authority, lender, or adviser before making a pricing or investment decision.

    Calculator model reviewed: August 9, 2026. This date covers the page and calculator guidance, not a guarantee that every live platform rate or term was re-audited on that date.

    Worked example

    Worked example for Shopify Inventory Turnover: $15k COGS over 3 months with $5k avg inventory

    COGS $15,000 for 3 months, average inventory $5,000.

    Turnover ratio 3.0 for quarter. Period days ~91 days, days to sell ~30 days. Annualized turnover 12, annual days to sell ~30. Rating excellent to good for Shopify. Monthly reorder suggestion $5,000 COGS to maintain pace.

    FAQ

    Shopify Inventory Turnover Calculator FAQs

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