We’ve covered why speed affects conversion rate in general terms. This post is the practical follow-up: how do you actually check whether it’s happening on your own site, right now, rather than just accepting it as a theoretical risk? Here’s a straightforward way to find out.
Start With Your Actual Speed Numbers
Run your homepage, your top service pages, and your booking page through PageSpeed Insights. If your mobile scores sit in the “needs improvement” or “poor” range, covered in our PageSpeed scoring post, you already have reason to suspect speed is part of the story — but the next steps confirm whether it’s actually costing you enquiries specifically.
Compare Enquiry Rate by Device
If you have Google Analytics connected, look at your enquiry or booking conversion rate broken down by device. A meaningfully lower conversion rate on mobile than desktop is one of the clearest signals available, since mobile is almost always where your speed problems are worst, as we cover in our desktop-versus-mobile post.
Check Your Bounce Rate on Key Pages
A high bounce rate specifically on pages that should be driving enquiries — your homepage, service pages, or booking page — paired with a slow load time on those same pages, is a strong pattern worth taking seriously. Covered in more depth in our bounce rate post, this tells you visitors are leaving before they ever reach the point of enquiring.
Look at Traffic Versus Enquiry Volume Over Time
If your traffic has stayed steady or grown, but your enquiry volume hasn’t kept pace, something in your funnel is leaking. Speed isn’t the only possible cause, but it’s one of the easiest to test directly, simply by checking whether a known slow period in your site’s history lines up with that gap.
Test the Experience Yourself, on Your Phone, on Mobile Data
Numbers only tell part of the story. Turn off Wi-Fi, use your phone’s regular mobile data, and try to book an appointment on your own site the way a patient actually would. If you find yourself waiting, getting frustrated, or giving up before finishing, that’s a direct, visceral signal — not just a number on a report.
Compare Your Enquiry Numbers Before and After Any Speed Change
If you’ve made speed improvements recently, even something as simple as compressing images or installing caching, compare enquiry volume in the weeks before and after. This is one of the clearest ways to see a direct, causal signal rather than a correlation you’re only guessing at.
Watch for These Specific Red Flags
- A consistently higher cost per click or cost per enquiry on paid campaigns pointing to slow landing pages, something we cover in our Meta ads cost-per-click post.
- Patients mentioning, even casually, that your site was slow to load or hard to use on their phone — direct feedback like this is rare but worth taking seriously every time it happens.
- A booking page that loads noticeably slower than the rest of your site, covered in our booking page speed post, since this is the single highest-leverage page for this exact problem.
What to Do If the Signals Line Up
If several of these signals point the same direction, speed is very likely part of what’s costing you enquiries, not just a background technical issue. At that point, the fix isn’t more marketing spend or new ad creative — it’s closing the gap between the traffic you’re already earning and the patients who actually complete an enquiry once they arrive.
The Takeaway
You don’t need to guess whether speed is costing you patients. Device-level conversion data, bounce rate on key pages, your own hands-on mobile test, and before-and-after comparisons around speed changes all give you real, checkable evidence rather than a hunch. Most owners are surprised by how clearly the pattern shows up once they actually look.
Want us to run this diagnosis for you, against your actual numbers? [Book a free website audit] and we’ll tell you exactly what speed is costing you.
