Lost revenue calculator: what a better conversion rate is worth
Most stores try to grow by buying more traffic. This calculator shows the other lever: how much more you would make from the visitors you already have if a few more of them bought.
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Lost revenue from conversion is the gap between what your traffic earns now and what it would earn at a higher conversion rate: monthly visitors × (target rate − current rate) × average order value. A store with 10,000 visitors a month, a 1.5% conversion rate and a $60 average order makes $9,000; at 2% it would make $12,000, so it is leaving $3,000 a month on the table.
- Revenue
- = visitors × conversion rate × average order value
- Lost revenue
- = visitors × (target rate − current rate) × average order value
- Revenue per visitor
- = revenue ÷ visitors
- Revenue = visitors × conversion rate × average order value. Raising any one of the three raises revenue in proportion.
- Small conversion gains are worth a lot: going from 1.5% to 2% is a third more orders from the same traffic.
- Compare the gain to the cost of buying the same revenue as traffic. Fixing your store is usually cheaper.
- Use your real numbers from Shopify or Google Analytics, over a normal month without big sales or spikes.
Where to find your numbers
You need three numbers for the same period, ideally the last full month:
- Monthly visitors (sessions). In Shopify go to Analytics → Reports → Sessions over time. In Google Analytics 4 use Reports → Acquisition → Traffic acquisition and read the Sessions total.
- Conversion rate. Shopify shows it on the Analytics overview as "Conversion rate". Otherwise divide orders by sessions and multiply by 100.
- Average order value (AOV). Shopify shows "Average order value" on the same overview. Otherwise divide revenue by the number of orders.
How the calculator works
Your current revenue is visitors × conversion rate × average order value. The calculator then runs the same sum with your target conversion rate and shows the difference per month and per year.
It also shows two numbers that make the gain easier to judge. Revenue per visitor is what each visit is worth today, which is the most you could pay per visitor in ads before losing money on revenue alone. Extra visitors needed is how much more traffic you would have to buy to earn the same gain without changing your conversion rate.
The maths assumes your average order value stays the same, which is a fair starting point: most conversion fixes (clearer pages, trust signals, a smoother checkout) get more people to buy rather than change what they buy.
What a realistic target looks like
Ecommerce conversion rates are usually quoted somewhere around 1% to 3%, but they vary a lot by industry, price point and where your traffic comes from. A store selling $15 impulse buys and one selling $900 sofas will never look alike, so the most useful benchmark is your own store last quarter.
A sensible first target is a relative improvement of 10–30%: from 1.5% to somewhere between 1.65% and 2%. That is what fixing a few clear problems (a hidden add-to-cart button on mobile, shipping costs that only appear at checkout, missing reviews) can realistically do. Doubling your conversion rate usually takes changes to the offer itself, not just the store.
| Current rate | Modest target (+15%) | Strong target (+30%) |
|---|---|---|
| 0.8% | 0.92% | 1.04% |
| 1.5% | 1.73% | 1.95% |
| 2.5% | 2.88% | 3.25% |
How to close the gap
The quickest wins are almost always on the pages most visitors see: your homepage and your best-selling product pages, on a phone. Look for the things that make a first-time visitor hesitate:
- 1Make it obvious within a few seconds what you sell and why someone should buy it from you.
- 2Put trust signals where the decision happens: reviews, delivery times, returns and payment options next to the add-to-cart button.
- 3Show shipping costs early. Surprise costs at checkout are one of the most common reasons people abandon a cart.
- 4Check that the add-to-cart button is visible on mobile without scrolling, and that pop-ups don't cover it.
- 5Fix slow pages. Every extra second before a page is usable costs you visitors who never see your products.
Our ecommerce conversion checklist walks through 40 of these checks. Or run a free StorePeek check and get the issues on your own store, ranked by impact, in about a minute.
Frequently asked questions
What is a good conversion rate for an online store?
Rates are commonly quoted around 1% to 3%, but they depend heavily on your industry, prices and traffic sources. Expensive products and cold social traffic convert lower; repeat customers and email traffic convert higher. Compare your store against its own past performance rather than a single industry average.
Should I use sessions or users for visitors?
Use sessions, because that is what Shopify and Google Analytics use to calculate conversion rate. Mixing users with a session-based conversion rate will make the numbers inconsistent.
Is it better to increase traffic or conversion rate?
Both raise revenue, but they cost different amounts. More traffic usually means paying for ads on an ongoing basis, while a conversion improvement keeps paying off on all the traffic you get, including the traffic you pay for. That is why it is usually worth fixing the store before scaling ad spend.
Does this calculator include profit?
No, it calculates revenue. To see how much of that revenue is profit after product, shipping and payment costs, use the break-even ROAS calculator, which works out your profit per order.
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