Time to First Byte (TTFB): Impact on Search Performance

Measures server responsiveness. How long the server takes to respond.

Global Average
0.5 s
Good Threshold
< 0.8 s
Correlation
Strong
Sample Size
23,721

Search Impressions by TTFB Range

How search visibility changes as TTFB gets slower

Click-Through Rate by TTFB Range

Average CTR for pages in each TTFB bucket

Average Position by TTFB Range

Where pages rank based on their TTFB performance

Resource Budget by TTFB Range

Average resource sizes for pages in each performance bucket

TTFB Range JS CSS Images Total
< 0.4s 1,213 KB 96 KB 526 KB 2,297 KB
0.4-0.8s 1,714 KB 137 KB 878 KB 3,440 KB
0.8-1.8s 1,345 KB 132 KB 926 KB 2,837 KB
1.8-3s 1,091 KB 142 KB 732 KB 2,588 KB
> 3s 1,060 KB 174 KB 963 KB 2,541 KB

TTFB by Page Type

Page Type Avg. TTFB Pages Rating
Product Page 0.3 s 1,701 Good
Category Page 0.38 s 299 Good
Article / Blog Post 0.52 s 1,556 Good
FAQ Page 0.56 s 434 Good
Service Page 0.69 s 140 Good
Static Page 0.72 s 212 Good

Frequently Asked Questions

What TTFB is acceptable?

Google considers TTFB under 0.8 seconds as 'Good'. TTFB is a server-side metric that affects all subsequent loading milestones. Our data shows a clear correlation with search rankings.

Other Metrics

LCP CLS INP FCP FID SI

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