CRO ROI Calculator
See what a conversion rate lift is worth to your store per year, how fast the work pays back, and the lift you need to break even.
Your numbers
Your result · updates as you type
Return on your CRO spend over 12 months
575%
A 10% lift takes conversion from 1.8% to 1.98%: 90 more orders and $6,750 more revenue a month. Over 12 months that's $40,500 of gross profit against $6,000 of cost.
- Extra gross profit (12 months)
- $40,500
- Payback
- 1.8 months
- Break-even lift
- 1.5%
A 1.5% conversion lift would cover the cost within 12 months, so the work pays off even if results land well below your 10% estimate. That's the case for fixing conversion before buying more traffic.
Breakdown
- Conversion rate
- 1.8% → 1.98%
- Orders per month
- 900 → 990
- Revenue per month
- $67,500 → $74,250
- Extra gross profit per month
- $3,375
- Extra gross profit over 12 months
- $40,500
- Cost over 12 months
- −$6,000
- Net return
- $34,500
How the return on CRO is worked out
Conversion work pays off through extra orders at the same traffic. The calculator turns your expected lift into extra orders, extra revenue and extra gross profit, then compares that with what the work costs.
Example
- Sessions per month
- 50,000
- Conversion rate
- 1.8% (900 orders)
- Average order value
- $75
- Gross margin
- 50%
- Expected lift
- 10%, so 1.8% becomes 1.98% (990 orders)
- Cost of the work
- $6,000 one-off
90 extra orders × $75 = $6,750 more revenue a month, or $3,375 of gross profit. Over 12 months that's $40,500 against $6,000, an ROI of 575%, with payback in 1.8 months. A lift of just 1.5% would cover the cost.
Picking a lift you can defend
- Lifts are relative. A 10% lift takes a 1.8% conversion rate to 1.98%, not to 11.8%.
- Judge the project by the break-even lift. If a small lift covers the cost, the work is low risk even if results come in under your estimate.
- Count profit, not revenue. Extra orders still cost you the product, shipping and fees, which is why gross margin is part of the math.
- Small stores can't prove small lifts quickly. An A/B test needs enough orders in each version to tell a real change from noise, so low-traffic stores are better off fixing obvious leaks than running many small tests.
- Lifts fade. Traffic mix, seasons and the site itself change. Twelve months is a sensible window; counting a gain forever overstates it.
Where to find your numbers
- 01
Shopify
Open Analytics in your Shopify admin for sessions, conversion rate and average order value. Use the last 12 months so one busy season doesn't skew the result.
- 02
WooCommerce
WooCommerce doesn't count sessions, so take them from GA4's Traffic acquisition report. Orders and average order value are in Analytics → Orders in your WordPress admin.
- 03
Gross margin
Use your margin after product cost. If you don't know it, the contribution margin calculator breaks it down per order.
If the numbers say the work is worth doing, that's the kind of project I take on for Shopify and WooCommerce stores: finding where visitors drop out, fixing it, and measuring the result. My details are at the bottom of this page.
Questions people ask
What's a good ROI for conversion rate optimization?
Anything above 0% over a period you trust means the work paid for itself. The break-even lift is the better test: the lower it is, the less the project has to deliver.
Should I measure CRO ROI on revenue or profit?
Profit. Every extra order still carries product and fulfillment costs, so revenue alone makes the return look bigger than it is.
How long should I count the gain for?
Twelve months is a common choice. Changes to your traffic, products and site wear a lift down over time, so a longer window overstates the return.
How do I include a monthly retainer or testing tool?
Enter it as the ongoing cost per month. The calculator adds it across the period and only counts payback once the monthly gain is bigger than the monthly cost.
Can CRO raise order value as well as conversion rate?
Yes. Bundles, thresholds and product page changes can lift AOV. Enter an AOV lift and the calculator combines it with the conversion lift.
Related tools
Want this builtinto your store?
I'm Emmanuel, a Shopify and WooCommerce developer. If this tool pointed at something you'd rather have fixed for you (a faster store, cleaner product data, a migration, a custom feature), send me a note.
Emmanuel Asika
Shopify & WooCommerce developer, Dublin
I build and fix online stores: new builds, migrations, speed, SEO and the custom bits apps can't do.
Last reviewed 30 September 2026.