Website Speed & Conversion Calculator

How to calculate speed impact on conversions?

The calculation uses industry research showing that every 1-second delay in page load time can reduce conversions by up to 7%.

Formula: New CR = Current CR × (1 + (Time Saved × 0.07))

Using the Speed Impact calculator: an example

If a site has 10,000 visitors and a 3% conversion rate, reducing load time from 5s to 3s creates a significant shift.

Step-by-step calculation:

• Calculate time saved: 5s - 3s = 2 seconds
• Calculate uplift: 2s × 7% = 14% improvement
• Calculate New CR: 3% × 1.14 = 3.42%
• Calculate Revenue: Multiply new orders by Average Order Value.

Frequently Asked Questions

Why does 1 second matter so much?

Consumer patience is low; 40% of users abandon a site that takes more than 3 seconds to load.

Does this apply to mobile and desktop?

Yes, but mobile users are typically more sensitive to speed due to varying network conditions.

What is a good target load time?

Google recommends a Largest Contentful Paint (LCP) of 2.5 seconds or less for a good user experience.