What's the Buy Box worth to your business?
Enter three numbers, drag the slider, and project your sales and profit at any Buy Box win rate. Free to use, no signup required.
Your numbers today
Enter your monthly sales, profit margin, and current Buy Box win rate.
Monthly sales
USD$50,000
$
The actual sales your business books each month at your current Buy Box win rate.
Profit margin
20%
Your net profit per sale after product cost, marketplace fees, shipping, and returns. Most marketplace sellers land between 12% and 25%.
Current Buy Box win rate
35%
The percentage of time your listings currently hold the Buy Box. Most sellers without automated repricing sit between 25% and 40%.
What if you won the Buy Box more often?
Drag the slider to a higher win rate. The numbers below update instantly to reflect that scenario.
Target win rate
35%
The hypothetical Buy Box win rate you want to model. Drag higher than today to project an uplift.
—
Drag the slider above to a higher win rate to see your projected gain.
Today
Projected
Monthly sales
$50,000
$50,000
Monthly profit
$10,000
$10,000
Annual sales
$600,000
$600,000
Annual profit
$120,000
$120,000
How the calculation works
Two steps. Every number traces back to your inputs.
Current profit
Your monthly sales multiplied by your profit margin. This is the profit your business books at your current Buy Box win rate.
Projected profit
When your Buy Box win rate moves from your current rate to your target rate, sales scale by the ratio of those two rates. Apply your profit margin to the projected sales to get projected profit. Multiply by 12 for the annual figure.
Sales are assumed to scale linearly with Buy Box win rate. Actual results vary by category, pricing strategy, inventory, and seasonality. Marketplace fees are already included in the profit margin you enter, so they are not modeled separately.
About this calculator
On marketplaces like Amazon and Walmart, multiple sellers can offer the same product. The Buy Box is the featured offer that wins the sale by default. Your Buy Box win rate is the percentage of time your listings hold that featured position across your catalog.
Industry benchmarks consistently place sellers without automated repricing in this range. The marks on the slider are reference points, not constraints. Use your actual win rate.
Yes. The calculation applies to Amazon, Walmart, eBay, and any platform with a Buy Box or featured-offer mechanic.
Fees are included in the profit margin you enter. This keeps the calculation simple and traceable. Make sure your margin accounts for referral fees, FBA, shipping, and returns.
Yes. Your inputs are encoded in the page URL, so the link in your address bar captures your exact scenario. Copy the URL to share the same view with a colleague.
These are estimates based on your inputs. Real-world performance depends on category, pricing strategy, inventory, and seasonality. Use the calculator to gauge the order of magnitude, not to forecast precise quarterly numbers.
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