The State of Web Vitals

TTFB distribution React sites

How TTFB is distributed across real-user data, plus pass-rate breakdown.

Field data PhoneDesktopAll Scope All sites October 2026 edition · Desktop field outcomes · React sites only
React Scoped to 9,570 sites out of 210,902 analyzed (frameworks) Compare with all sites →
1

At a glance the headline numbers for TTFB distribution

How TTFB is distributed across real-user data, plus pass-rate breakdown.

52.6%
of sites good on TTFB
761ms
Typical site
2.5s
Worst 10% of sites

52.6% of sites good on TTFB. The typical site's TTFB is 761ms. The worst 10% are above 2.5s.

The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
2

The TTFB distribution site count at each TTFB, from good to poor

0 71 142 212 283
0–150ms31 sites1.9% of all sites
150–300ms283 sites17.3% of all sites
300–450ms223 sites13.6% of all sites
450–600ms149 sites9.1% of all sites
600–750ms127 sites7.8% of all sites
750–900ms107 sites6.5% of all sites
900–1050ms81 sites5% of all sites
1050–1200ms87 sites5.3% of all sites
1200–1350ms64 sites3.9% of all sites
1350–1500ms59 sites3.6% of all sites
1500–1650ms56 sites3.4% of all sites
1650–1800ms46 sites2.8% of all sites
1800–1950ms49 sites3% of all sites
1950–2100ms37 sites2.3% of all sites
2100–2250ms30 sites1.8% of all sites
2250–2400ms31 sites1.9% of all sites
2400ms and up176 sites10.8% of all sites
p50 = 761ms
p75 = 1.5s
p90 = 2.5s
p99 = 4.5s
0–150 150–300 300–450 450–600 600–750 750–900 900–1050 1050–1200 1200–1350 1350–1500 1500–1650 1650–1800 1800–1950 1950–2100 2100–2250 2250–2400 2400+
Good (≤800ms) Needs improvement Poor (>1.8s) Percentile markers Total: 1,636 sites

Most sites are good on TTFB. 52.6% sit at or under 800ms. The typical site is at 761ms, and 75% of sites stay under 1.5s. Only 47.4% miss good TTFB. The slowest 10% are above 2.5s, and the slowest 1% are above 4.5s.

The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
3

The TTFB pass rate the share of sites that are good, needs improvement and poor

TTFB
52.6%
27.7%
19.7%
Good Needs Improvement Poor

52.6% of sites are good on TTFB. 27.7% are in the needs improvement band, between 800ms and 1.8s. 19.7% are poor, above 1.8s. Misses split about evenly between the two.

The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
Related signals FCP → LCP → CLS → INP → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured