⚖️ Comparison · Updated for 2026
FTTP (Full Fibre) vs G.fast / FTTC
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
Quick answer: G.fast (BT's fastest copper product) reaches 330 Mbps max but varies hugely by distance. FTTC reaches 80 Mbps. Full fibre (FTTP) delivers 1 Gbps symmetrical, unlimited by distance within the home. G.fast is a bridging technology being deployed where FTTP rollout hasn't reached yet. Always choose FTTP when available.
Decision guide — when to use which
Use FTTP (Full Fibre) when…
FTTP: always, when available. It's the permanent solution.
Use G.fast / FTTC when…
G.fast: short-term option where FTTP unavailable. Better than FTTC, not as good as fibre.
📊 Side-by-side comparison
| Aspect | FTTP (Full Fibre) | G.fast / FTTC |
|---|---|---|
| Max speed | 1,000 Mbps (FTTP) | 330 Mbps (G.fast) / 80 Mbps (FTTC) |
| Distance sensitivity | None | High (G.fast degrades beyond 100m) |
| Upload speed | 500-1,000 Mbps symmetric | 35 Mbps (FTTC) / 50 Mbps (G.fast) |
| Future-proof | Yes (10+ Gbps capable) | No (bridging tech) |
| UK coverage | ~50%, growing fast | More widespread but declining |
Frequently asked
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Is G.fast worth choosing over standard FTTC?
If FTTP is not available and you're offered G.fast at no extra cost, yes. The speed uplift matters for households with multiple users streaming in 4K. If FTTP is coming to your area within 12-18 months (check Openreach's FTTP rollout map), it may not be worth switching to G.fast in the interim.
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How do I check what's available at my address?
Ofcom's connected nations checker (ofcom.org.uk) or Openreach's checker shows exact technology at your address, including whether FTTP is planned and when.
Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.