Act on the result
Compare the target inventory balance with current purchasing commitments before changing order quantities.
Educational only: Business decision support, not accounting, tax or legal advice.
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Update policy: Reviewed when formulas or official dependencies change.
Scope: Market-neutral small-business planning using your own assumptions.
What this planner helps you decide
Best for
Product and ecommerce businesses reviewing inventory velocity and working capital.
Outputs
Average inventory, turnover, inventory days and target cash release or investment.
Start here
Use COGS and inventory balances from the same period, then set a practical target turnover.
Use a different tool when: Do not use this to compare annualised gross margin earned with average inventory investment; use Gross Margin Return on Inventory Planner for that decision. Use this tool to measure inventory turnover and target working-capital change.
Commerce & operations
Inventory Turnover: average inventory
Average inventory, turnover, inventory days and target cash release or investment.
Amounts use the same currency as your inputs. No currency conversion is performed.
Inventory Turnover
Measure how often inventory turns, the days it remains on hand and the cash effect of a target turnover.
Your numbers stay in this browser
Choose a direct average balance or calculate it from opening and closing inventory.
Use the average inventory balance for the period. Use one consistent ex-tax currency basis.
Use the inventory balance at the start of the period. Use one consistent ex-tax currency basis.
Use the inventory balance at the end of the period. Use one consistent ex-tax currency basis.
Use COGS for the same period as inventory. Use one consistent ex-tax currency basis.
Use the calendar days represented by the COGS figure.
Set a practical turns target for the same period.
Decision result
Every value is bound to the registered inventory or hospitality engine and keeps the decision components visible on one consistent basis.
- Average Inventory Cost
- 50,000.00
- Turnover
- 6 turns
- Inventory days
- 60.83 days
- Target Average Inventory Cost
- 37,500.00
- Target Inventory Change
- -12,500.00
- Target Cash Effect Amount
- 12,500.00
Scenario comparison
Each row names the assumption axis changed from the baseline.
ScenarioResultDifference
Current scenario60.83 daysBaseline
Lower Target inventory turns60.83 days0 days
Higher Target inventory turns60.83 days0 days
Save these results, change an input, then compare the updated figures with this baseline.
The baseline is temporary in this tab and is not added to shared scenario links or generated reports.
Calculation details
View calculation detailsView the formulas and inputs used for these results.
Average Inventory Cost
Average Inventory Cost
average inventory, or (opening inventory + closing inventory) / 250,000.00Result50,000.00
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- Average Inventory CostInventory Mode
- 0
- Average Inventory CostAverage Inventory Cost
- 50,000
- Average Inventory CostBeginning Inventory Cost
- 45,000
- Average Inventory CostEnding Inventory Cost
- 55,000
- Average Inventory CostCost Of Goods Sold
- 300,000
- Average Inventory CostPeriod Days
- 365
- Average Inventory CostTarget Turnover
- 8
Turnover
Turnover
cost of goods sold / average inventory6 turnsResult6 turns
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- TurnoverInventory Mode
- 0
- TurnoverAverage Inventory Cost
- 50,000
- TurnoverBeginning Inventory Cost
- 45,000
- TurnoverEnding Inventory Cost
- 55,000
- TurnoverCost Of Goods Sold
- 300,000
- TurnoverPeriod Days
- 365
- TurnoverTarget Turnover
- 8
Inventory days
Inventory Days
period days / inventory turnover60.83 daysResult60.83 days
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- Inventory DaysInventory Mode
- 0
- Inventory DaysAverage Inventory Cost
- 50,000
- Inventory DaysBeginning Inventory Cost
- 45,000
- Inventory DaysEnding Inventory Cost
- 55,000
- Inventory DaysCost Of Goods Sold
- 300,000
- Inventory DaysPeriod Days
- 365
- Inventory DaysTarget Turnover
- 8
Target Average Inventory Cost
Target Average Inventory Cost
cost of goods sold / target turnover37,500.00Result37,500.00
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- Target Average Inventory CostInventory Mode
- 0
- Target Average Inventory CostAverage Inventory Cost
- 50,000
- Target Average Inventory CostBeginning Inventory Cost
- 45,000
- Target Average Inventory CostEnding Inventory Cost
- 55,000
- Target Average Inventory CostCost Of Goods Sold
- 300,000
- Target Average Inventory CostPeriod Days
- 365
- Target Average Inventory CostTarget Turnover
- 8
Target Inventory Change
Target Inventory Change
target average inventory − current average inventory-12,500.00Result-12,500.00
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- Target Inventory ChangeInventory Mode
- 0
- Target Inventory ChangeAverage Inventory Cost
- 50,000
- Target Inventory ChangeBeginning Inventory Cost
- 45,000
- Target Inventory ChangeEnding Inventory Cost
- 55,000
- Target Inventory ChangeCost Of Goods Sold
- 300,000
- Target Inventory ChangePeriod Days
- 365
- Target Inventory ChangeTarget Turnover
- 8
Target Cash Effect Amount
Target Cash Effect Amount
absolute target inventory change12,500.00Result12,500.00
Uses one consistent period, item basis and market-neutral ex-tax currency where money applies. The engine retains full precision; display rounding does not feed calculation.
Inventory Turnover Planner formulas →Inputs used by these formula steps
- Target Cash Effect AmountInventory Mode
- 0
- Target Cash Effect AmountAverage Inventory Cost
- 50,000
- Target Cash Effect AmountBeginning Inventory Cost
- 45,000
- Target Cash Effect AmountEnding Inventory Cost
- 55,000
- Target Cash Effect AmountCost Of Goods Sold
- 300,000
- Target Cash Effect AmountPeriod Days
- 365
- Target Cash Effect AmountTarget Turnover
- 8
Inputs used
- Inventory balance method
- 0
- Average inventory at cost
- 50,000.00
- Opening inventory at cost
- 45,000.00
- Closing inventory at cost
- 55,000.00
- Cost of goods sold
- 300,000.00
- Days in period
- 365
- Target inventory turns
- 8
Open this calculator with preset values
This calculator supports documented, shareable scenario URLs. Compatible assistants and applications can construct links using the parameters below.
Scenario links contain only allowlisted numeric and closed-choice inputs shown in the URL; Margin101 excludes free text and identifying fields. Anyone you share the URL with can read those numbers, so do not include private or identifying data.
| Parameter | Meaning | Unit | Allowed values | Presence | Default |
|---|---|---|---|---|---|
| averageInventoryCost | Use the average inventory balance for the period. Use one consistent ex-tax currency basis. | currency units/planning period, ex tax | 0 to 10000000 | Required | 50000 |
| beginningInventoryCost | Use the inventory balance at the start of the period. Use one consistent ex-tax currency basis. | currency units/planning period, ex tax | 0 to 10000000 | Required | 45000 |
| costOfGoodsSold | Use COGS for the same period as inventory. Use one consistent ex-tax currency basis. | currency units/planning period, ex tax | 0 to 10000000 | Required | 300000 |
| endingInventoryCost | Use the inventory balance at the end of the period. Use one consistent ex-tax currency basis. | currency units/planning period, ex tax | 0 to 10000000 | Required | 55000 |
| inventoryMode | Choose a direct average balance or calculate it from opening and closing inventory. | — | 0 (Average inventory), 1 (Opening and closing inventory) | Required | Average inventory |
| periodDays | Use the calendar days represented by the COGS figure. | days | 1 to 3660 | Required | 365 |
| targetTurnover | Set a practical turns target for the same period. | inventory turns/planning period | 0.01 to 1000 | Required | 8 |
Inventory Turnover: average inventory
Use turnover and days together: faster movement may release cash but can increase stockout risk.
Formula summary
- Primary formula
- period days / inventory turnover
Data used here
- The estimate uses your inputs and the general business formula documented in the methodology.
Decision checks
Stress-test the decision
Retest with slower sales and a lower target turnover for seasonal or volatile items.
When this estimate can be misleading
- Demand, costs, lead times, tax and targets are user-entered scenarios; no market benchmark is embedded.
- Use one consistent item, period and ex-tax currency basis where money applies.
- This is educational business decision support, not accounting, tax, legal or financial advice.
- Use turnover and days together: faster movement may release cash but can increase stockout risk.
Educational estimate, not advice. See all assumptions & limitations →
Related reading
Guides to interpret the decision and its assumptions.
- Inventory Count Checklist for a Reliable Stock Baseline
Prepare a controlled physical count, reconcile exceptions and preserve a reliable operational baseline without prescribing valuation treatment.
Read guide - Inventory Turn vs Stock Availability
Compare stock efficiency and availability on aligned periods without prescribing a universal turn or service target.
Read guide
Frequently asked questions
How do I measure inventory turnover and target working-capital change?
Compare the target inventory balance with current purchasing commitments before changing order quantities.
Which planning assumptions should I stress-test?
Compare a plausible alternative scenario and verify the decision-critical assumption that changes the plan most.