Overview
UK Lotto numbers 1–59 can be grouped by decade: 1–9, 10–19, 20–29, 30–39, 40–49, 50–59. Over 30 years, winning draws typically include numbers from several decades—all 6 from one decade is rare.
Important
Each number has equal probability. Past decade spread does not affect future draws.
Theoretical expectation
Each decade has 9 or 10 numbers (1–9 has 9; 10–19, 20–29, etc. have 10). With 6 numbers drawn, you expect roughly 1 number per decade on average. Draws with 2–3 numbers from one decade and 0 from another are common.
Observed distribution — full history (Fetix)
Period: 1994 → 2026 (~3,248 draws). Average count per decade in winning draws:
| Decade | Numbers | Avg per draw | Source |
|---|---|---|---|
| 1–9 | 9 | ~0.92 | Fetix |
| 10–19 | 10 | ~1.02 | Fetix |
| 20–29 | 10 | ~1.02 | Fetix |
| 30–39 | 10 | ~1.02 | Fetix |
| 40–49 | 10 | ~1.02 | Fetix |
| 50–59 | 10 | ~1.00 | Fetix |
Decade 1–9 has slightly fewer numbers (9 vs 10), so it appears slightly less often. Variation of ±0.2 across decades is normal.
How many decades per draw?
How many decades per draw?Most draws (80%+) have numbers from 4–6 different decades. Draws with all 6 from 2–3 decades are rarer. All 6 from one decade is extremely rare (only possible for 50–59, with 10 numbers).
Format change (2015)
Before 2015: 1–49. Decades were 1–9, 10–19, 20–29, 30–39, 40–49. The 50–59 decade did not exist. Post-2015 data includes the new decade.
Go further on Fetix
- UK Lotto statistics — how often each number has been drawn, by period
- UK Lotto draws — verify draws
- My numbers — track your picks
- Check your Lotto numbers against every draw since 1994 — free, enter your 6 numbers
FAQ
Which decade appears most often?
Roughly equal across 10–19, 20–29, 30–39, 40–49. Decade 1–9 appears slightly less (9 numbers vs 10).
Should I spread my picks across decades?
It does not change your odds. All combinations are equally likely. Spreading is a personal preference.
How often do all 6 numbers come from 2 decades?
Possible but less common than draws spanning 4+ decades. No predictive value.
Does the bonus ball affect decade distribution?
The bonus ball is from 1–59. It can be included in a 7-number decade view. The main 6 distribution is unchanged.
Where does this data come from?
From UK Lotto draws stored in Fetix.
Is the 50–59 decade under-represented in full-history data?
Slightly, yes—it only entered the pool with the October 2015 format change, so it has about 10 years of data against up to 30 years for the other decades.
Disclaimer
UK Lotto is a game of chance. Fetix does not guarantee any winnings. Decade analysis is for interest only.