How many clients could a slow website be costing you?

If your website is slow on phones, some people leave before it even opens. For a practice with 800 visitors a month and a 5-second page, that could be roughly 2 to 5 new clients a month. Try your own numbers.

Work out my estimate Test my website's speed

Estimate what a slow page could cost.

Change any number. The estimate updates as you go.

Not sure? Try 500 for a small practice.

5 s

In seconds, until the main content shows. Our free website check measures it for you.

3%

Book, call or send a message. 3% is a cautious starting point.

How many sessions a typical new client books with you in total.

Your estimate

Estimated new clients missed each month

2 to 5

Each year29 to 58 new clients
Booked sessions that represents, each year346 to 691 sessions
Visitors who leave before it opens, each month160 to 320

This is an estimate, not a promise. It uses cautious numbers on purpose.

Check my website's real speed

How we worked this out.

Widely reported Google research found that the chance of someone leaving rises sharply as a phone page goes from 1 to 3 seconds and beyond. Most people leave if a page takes more than about three seconds.

We don't use those headline numbers. We use smaller, cautious ones, and show a range instead of one number.

  • Our assumption: for every second a page takes beyond the first, an extra 5% (low estimate) to 10% (high estimate) of visitors leave before it opens. We never count more than half of your visitors as lost.
  • Of the visitors who stay, your chosen share would get in touch.
  • We assume only half of the people who get in touch go on to book, to keep things cautious.
  • Booked sessions are new clients times your average sessions per client.

The example, step by step

  1. 800 visitors a month, page opens in 5 seconds
  2. 4 extra seconds × 5% to 10% = 20% to 40% leave160 to 320 people
  3. 3% of them would have got in touchabout 5 to 10
  4. Half of those would have bookedabout 2 to 5 clients
  5. × 12 sessions each, × 12 monthsabout 350 to 690 sessions a year

Rounded. The calculator shows exact figures for your numbers.

What you can do about it.

A faster website keeps more of the people who are already looking for you.

Measure your real speed

Our free check opens your website like a phone would and shows how long people wait.

Get a free website check

Why websites are slow on phones

The usual reasons, in plain words, and what actually helps.

Read the article

A website that opens in under a second

Every website we build is quick on any phone, so people stay and book.

What's included

Questions.

About this estimate and how to use it.

Is this a promise of how many clients I will get?

No. It is a rough estimate, shown as a range, to help you decide whether your website speed is worth looking at. Every practice is different.

How do I find out how fast my website is on a phone?

Our free website check opens your website the way a phone would and tells you how long it takes for the main content to show. You can also simply time it on your own phone, away from your office Wi-Fi.

Where does the "people leave" idea come from?

Widely reported Google research found that the chance of someone leaving rises sharply as a phone page goes from 1 to 3 seconds and beyond, and that most people leave if a page takes more than about three seconds. We use much smaller numbers than that research on purpose, so the estimate stays cautious.

How many visitors does my website get?

If you are not sure, ask whoever set up your website, or check the visitor numbers in your website account. If you have no idea, try a few numbers and see how the result changes.

Is anything I type here saved?

No. The numbers stay on your screen and are never sent or stored.

Find out how fast your website really is.

Send us your website. We'll check how it opens on a phone, and show you a preview of a quicker one.

Free. See your new homepage before you pay, and owe nothing if you don't love it.