Sales Funnel Ecommerce Calculator
Estimate ecommerce revenue, ad spend efficiency, and conversion performance at each stage of your sales funnel.
Overview
The Sales Funnel Ecommerce Calculator helps you estimate how many visitors turn into carts, checkouts, and completed orders, then shows the likely revenue and ad efficiency from those numbers. It is useful for testing how changes in conversion rates, average order value, or ad spend may affect ecommerce performance.
How it works
This calculator multiplies each funnel stage by the next conversion rate to estimate how many shoppers move through your ecommerce funnel. It then multiplies completed orders by average order value to estimate revenue. Cost per order is calculated by dividing ad spend by completed orders, and ROAS is calculated by dividing revenue by ad spend.
How to use this calculator
- 1Enter your monthly website visitors.
- 2Add your add to cart rate as a percentage of visitors.
- 3Enter the percentage of carts that start checkout.
- 4Enter the percentage of checkouts that become completed purchases.
- 5Add your average order value.
- 6Enter your monthly ad spend and review the estimated orders, revenue, and ROAS.
Example Calculation
Monthly visitors
50000
Add to cart rate
8%
Checkout start rate
60%
Purchase completion rate
45%
Average order value
$75
Monthly ad spend
$10,000
Estimated monthly orders
1,080
With 50,000 monthly visitors, an 8% add to cart rate, 60% checkout start rate, and 45% purchase completion rate, the funnel would produce about 1,080 orders and roughly 81,000 in monthly revenue, with a ROAS of about 8.10x.
Frequently asked questions
What does this ecommerce funnel calculator estimate?
It estimates how many visitors become carts, checkouts, and completed orders, along with revenue, cost per order, and return on ad spend.
How is overall conversion rate calculated?
Overall conversion rate is the percentage of total visitors who end up completing a purchase.
What is ROAS in this calculator?
ROAS stands for return on ad spend. It shows how much revenue you generate for each unit of advertising spend.
Does this calculator include refunds or returns?
No. If you want a more conservative estimate, use a lower average order value or adjust your inputs to reflect net revenue.
Can I use this calculator for organic traffic too?
Yes, but cost per visitor, cost per order, and ROAS are most useful when ad spend is included.
Why do small conversion rate changes make a big difference?
Because each funnel stage compounds the next one, even modest improvements can produce a meaningful change in completed orders and revenue.
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Assumptions and warnings
Assumptions
- The funnel stages happen in sequence from visitor to add to cart to checkout to purchase.
- Rates are treated as stable averages across the month.
- Revenue is estimated using average order value and completed orders only.
- The calculator does not account for refunds, taxes, shipping income, or repeat purchases unless reflected in your average order value.
Warnings
- This calculator provides an estimate only and is not business or financial advice.
- Results can vary significantly based on traffic quality, product mix, seasonality, and attribution methods.