What is slow costing you?
Put in your visitors, your conversion rate and what a customer is worth. The calculator turns "the site feels slow" into a rand figure per month, using your numbers, with the assumption on show so you can argue with it.
Estimates only, and only as good as the numbers you put in.
From Google Analytics, or your best estimate.
Visitors who buy or enquire. 1 to 3% is typical.
What one converted visitor is worth to you.
Don't know? Measure it with the PageSpeed link below.
Under 2.5 seconds is the usual goal on mobile.
Only used to build the PageSpeed link.
Industry studies land around 7% per second. Change it to whatever you believe.
The working: only the first 5 seconds of improvement count (2.5 sec here) at 7% per second, so conversion rises 17.5%.
An estimate built on a rule of thumb, not a measurement of your business. Speed is one of several things that decide whether a visitor converts. If the page is fast but the offer is unclear, fixing speed alone will not produce this number.
Calculator questions.
Where does the 7% per second come from?
It is a rule of thumb drawn from published industry research on load time and conversion, not a measurement of your business. That is why it sits in an open field you can change. If you think the effect is smaller, set it to 3% and see whether the number still justifies the work.
How accurate is this?
Treat it as an order of magnitude, not a forecast. It tells you whether you are arguing about hundreds a month or tens of thousands, which is usually the decision you need to make.
Why is the improvement capped?
Because a straight line stops being believable at the extremes. The calculation only counts the first five seconds of difference. Without that cap the tool would produce numbers nobody should act on.
Do you store what I type in?
No. It all runs in your browser and disappears when you close the tab.