Retail Sell-Through Rate (%) & Weeks of Supply (WOS) Inventory Velocity Calculator

Evaluate retail merchandising velocity via Sell-Through % and remaining Weeks of Supply (WOS).

Period Sell-Through Rate
35 %
Remaining Weeks of Supply (WOS) 7.43 weeks
Weekly Sales Velocity 105 units/wk
Ending On-Hand Inventory 780 units
Inputs
⚡ Scenarios:
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
units
Units received or Beginning-of-Month (BOM) inventory.
units
Units sold during the measurement period.
weeks
Length of the measurement period in weeks (typically 4 weeks / 1 month).
Results & Graph
Period Sell-Through Rate
35 %
Remaining Weeks of Supply (WOS)
7.43 weeks
Weekly Sales Velocity
105 units/wk
Ending On-Hand Inventory
780 units

Period Sell-Through Rate

Graph 1 • Sell-Through & Weeks of Supply • Domain Architecture & Live Telemetry Maps Beginning Inventory Units, Units Sold In Period, Period Length Weeks through Sell-Through & Weeks of Supply Formula.
RETAIL & MERCHANDISING Period Sell-Through Rate 35 % Remaining Weeks of Supply 7.43 weeks Sell-Through & Weeks of Supply • Component Waterfall Period Sell-Through Rate 35 % Remaining Weeks of Supply (WOS 7.43 weeks Weekly Sales Velocity 105 units/wk Ending On-Hand Inventory 780 units
Graph 2 • Period Sell-Through Rate Across Beginning Inventory Units Sweep (40% → 160%) Evaluates SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100; WeeksOfSupply ( across 7 operating points (current input highlighted).
0 % 48.13 % 96.25 % 87.50 480units 58.33 720units 43.75 960units 35 1.2kunits 29.17 1.4kunits 25 1.7kunits 21.88 1.9kunits
Graph 3 • Joint Sensitivity: Beginning Inventory Units × Units Sold In Period Compares Period Sell-Through Rate when Units Sold In Period is shifted +25% (solid) vs. −25% (dashed).
0 % 34.38 % 68.75 % --- Units Sold In Period @ 75% 62.50 -30% 51.47 -15% 43.75 +0% 38.04 +15% 33.65 +30%
Summary: Selling 420 of 1200 units in 4 weeks yields a 35% sell-through rate (105 units/week), leaving 780 units or 7.4 Weeks of Supply (WOS).
Summary: Selling 420 of 1200 units in 4 weeks yields a 35% sell-through rate (105 units/week), leaving 780 units or 7.4 Weeks of Supply (WOS).
⚡ Send result to: ROI Calculator →Percentage →
Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: Sell-Through & Weeks of Supply Formula

SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100
WeeksOfSupply (WOS) = EndingInventoryUnits / WeeklySalesVelocity
SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100; WeeksOfSupply (WOS) = EndingInventoryUnits / WeeklySalesVelocity
  • beginningInventoryUnits: Units received or Beginning-of-Month (BOM) inventory.
  • unitsSoldInPeriod: Units sold during the measurement period.
  • periodLengthWeeks: Length of the measurement period in weeks (typically 4 weeks / 1 month).

Rounding: Internal floating-point calculations preserve full precision; currency and percentage outputs round to 2 decimal places.

Worked Example: Sell-Through & Weeks of Supply Worked Example

Evaluate retail merchandising velocity via Sell-Through % and remaining Weeks of Supply (WOS).

  1. Enter your operational, financial, or physical measurement inputs.
  2. Apply the standard domain equation: SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100; WeeksOfSupply (WOS) = EndingInventoryUnits / WeeklySalesVelocity.
  3. Review the primary result, sensitivity metrics, and 3 interactive SVG graphs.
Result: Calculates Sell-Through & Weeks of Supply via SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100; WeeksOfSupply (WOS) = EndingInventoryUnits / WeeklySalesVelocity.

Frequently Asked Questions

How does the Retail Sell-Through Rate (%) & Weeks of Supply (WOS) Inventory Velocity Calculator calculate results?

It computes SellThrough% = (UnitsSold / UnitsReceivedOrBOM) × 100; WeeksOfSupply (WOS) = EndingInventoryUnits / WeeklySalesVelocity directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for any input variable?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any input parameter.

Are my business and personal numbers kept private?

Yes. All calculations execute 100% locally in your browser with zero server transmission.

Business & Marketing · Retail & Merchandising

Retail Sell-Through Rate (%) & Weeks of Supply (WOS) Inventory Velocity Calculator: inputs, method, and how to read the result

Evaluate retail merchandising velocity via Sell-Through % and remaining Weeks of Supply (WOS).

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
  • Beginning Inventory Units: Units received or Beginning-of-Month (BOM) inventory.
  • Units Sold In Period: Units sold during the measurement period.
  • Period Length Weeks: Length of the measurement period in weeks (typically 4 weeks / 1 month).

What the calculation includes

With the default values shown, Period Sell-Through Rate is 35 %. The calculation follows Sell-Through & Weeks of Supply Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Beginning Inventory Units from 1,200 units to 1,320 units changes Period Sell-Through Rate from 35 % to 31.82 %. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses industry-standard APICS/ASCM supply chain, lean manufacturing, and consumer physics formulas.
  • Actual commercial freight tariffs, marketplace commissions, and utility rates vary by carrier and contract.

Scope: Global Supply Chain, Business & Consumer Standard Check the assumptions and limitations against your situation before relying on the estimate.

More in Business & Marketing: ROI Calculator (Return on Investment), Percentage Calculator.