Check Unit Sales Needed to Offset a Promotional Price Markdown — Free
A ten-percent discount does not need ten percent more sales. Because every markdown comes straight out of gross margin, calculate the exact extra units each product line must sell just to keep total gross profit whole.
The proof surface
Stock-cover tools measure how long warehouse inventory lasts. This computes the break-even unit volume hurdle required before a promotional price cut increases gross profit.
Why the flat version breaks
Comparing discount percent to volume percent
A 10 percent price cut on a 25 percent margin product requires 66.7 percent more unit volume just to stand still.
Discounting below variable cost
When the discount percentage meets or exceeds gross margin, volume only multiplies losses.
Ignoring fulfilment capacity
Selling 100 extra units to make the same gross profit still consumes extra packing labour and stock.
How to work the markdown margin chart
Use the product’s unit gross margin percentage before discounting. A 40 percent margin product loses a quarter of its unit contribution when discounted by 10 percent of list price.
Record the unit volume you would normally sell without running the promotion.
Enter the percentage discount off the selling price; it must stay below the product’s gross margin percentage or every unit sold loses money.
At a 10 percent discount, 300 bags at 40 percent margin must grow to 400 bags — 100 extra units. Rows needing more than a 50 percent volume jump are flagged as steep hurdles.
What the markdown margin chart replaces
| Question | Before | Visible working |
|---|---|---|
| Comparing discount percent to volume percent | A 10 percent price cut on a 25 percent margin product requires 66.7 percent more unit volume just to stand still. | Enter baseline unit sales for the period |
| Discounting below variable cost | When the discount percentage meets or exceeds gross margin, volume only multiplies losses. | Set the planned promotional markdown |
| Ignoring fulfilment capacity | Selling 100 extra units to make the same gross profit still consumes extra packing labour and stock. | Compare the unit hurdle against realistic lift |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Promotional break-even unit arithmetic on margins you supply. Not pricing or accounting advice; include payment fees, shipping subsidies and ad spend before approving a promotion.
Data note: Everything runs in this browser tab on the markdown margin chart: your product line | gross margin percent before discount | baseline unit sales stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a plotted bar chart sheet
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the markdown margin chart reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The markdown margin chart reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the check unit sales needed to offset a promotional price markdown companionBoundary
Promotional break-even unit arithmetic on margins you supply. Not pricing or accounting advice; include payment fees, shipping subsidies and ad spend before approving a promotion.
What this is built on
- Method: Enter the percentage discount off the selling price; it must stay below the product’s gross margin percentage or every unit sold loses money.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-29, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: A 10 percent price cut on a 25 percent margin product requires 66.7 percent more unit volume just to stand still. After: the markdown margin chart shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this markdown margin chart, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a markdown margin chart. Return plain rows only: product line | gross margin percent before discount | baseline unit sales. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: product line | gross margin percent before discount | baseline unit sales. No AI response is executed as code.