Months sober: 2, 3, 4, 5, 9 and 18 months without alcohol
Searching "4 months sober" or "9 months sober" gets very little. Here is each month converted to days, with what is documented and what is not.
Months are just days under another name: 2 months is about 60 days, 3 months 90, 4 months 120, 5 months 150, 9 months 270 and 18 months 548. NIAAA’s research definitions put the first 3 months in an "initial" stage, 3 months to a year in "early", and 1 to 5 years in "sustained" [1]. The firmest figure at the months scale is Alcohol Change UK’s: six months after Dry January, seven in ten participants were still drinking less riskily [2]. Apart from that, little research is dated to a specific month, and this page says so.
Months in days
| Months sober | Days | Weeks | NIAAA stage | Nearest badge in Sober Girl |
|---|---|---|---|---|
| 2 months | 60 | 8.6 | Initial [1] | 60 days. See 60 days sober |
| 3 months | 90 | 12.9 | Initial, ending [1] | 90 days. See 90 days sober |
| 4 months | 120 | 17.1 | Early [1] | 90 days. Next badge at 180 |
| 5 months | 150 | 21.4 | Early [1] | 90 days. Next badge at 180 |
| 6 months | 180 | 25.7 | Early [1] | 180 days. See 6 months sober |
| 9 months | 270 | 38.6 | Early [1] | 180 days. Next badge at 365 |
| 18 months | 540 | 77.1 | Sustained [1] | 365 days. The list ends there |
Track it in Sober Girl
4 months sober (about 120 days)
Four months puts you a month past the point where NIAAA’s "initial" stage ends [1]. There is no study dated to this month, so the useful angle is practical: it is the stretch after the big round numbers, when attention drifts. The next marker is six months, so set a halfway point at 150 days.
5 months sober (about 150 days)
Five months sits inside the window that Alcohol Change UK uses for its six-month follow-up: people who took a month off in January and were still drinking less riskily after six [2]. That figure is about cutting down after a month, not five months of abstinence, so it is context rather than a prediction. A month before the half-year is a good time to decide how you want to mark it. See 6 months sober.
9 months sober (about 270 days)
Nine months is three quarters of a year, and the first time many people can see the year ahead as achievable. It is also where early-stage research bands start to feel close to ending: the "early" stage runs to 12 months and then becomes "sustained" [1]. Nothing changes physiologically at day 270. What you can do is draft the plan for the one-year day while there is time to make it good.
18 months sober (about 540 days)
At 18 months you are well into the "sustained" stage, which runs from 1 to 5 years [1]. The first anniversary has passed, and the attention that came with it has gone. That is the point where a daily check-in, a reason you can still read, and one person who knows tend to matter more than a milestone. See 2 years sober for the next marker.
Drinks skipped by month
| Months | Days | Drinks skipped | Alcohol skipped | Calories from alcohol |
|---|---|---|---|---|
| 2 | 60 | 120 | 1,680 g | 11,760 kcal |
| 3 | 90 | 180 | 2,520 g | 17,640 kcal |
| 4 | 120 | 240 | 3,360 g | 23,520 kcal |
| 5 | 150 | 300 | 4,200 g | 29,400 kcal |
| 9 | 270 | 540 | 7,560 g | 52,920 kcal |
| 18 | 540 | 1,080 | 15,120 g | 105,840 kcal |
Use the sobriety counter to see your exact days and the calculator for the money.
Is Sober Girl right for you?
- use an Android phone (the iPhone app is coming soon)
- want a private tracker, with your journal kept on your device
- want a day counter, money saved and a daily check-in in one calm place
- want a Craving SOS with a breathing exercise and a 10-minute timer
- want to start free and add Plus only if you need the journal, insights or milestone cards
- need it on an iPhone today (the App Store version is coming soon)
- want a community feed, live coaching or an AI chat
- want a structured multi-week education program
- need medical help for heavy drinking or withdrawal. An app is not treatment, so see the safety notes above
Frequently asked questions
How many days is 4 months sober?
About 120 days, or 17 weeks, counting 30 days a month.
How many days is 3 months sober?
About 90 days. NIAAA’s research definitions treat 3 months as the end of the initial stage.
What happens at 9 months sober?
We found no study dated to 9 months. It sits in NIAAA’s early stage, which runs from 3 months to a year.
How many days is 18 months sober?
About 540 days, counting 30 days a month, or 548 using the average month. It is in the sustained stage, which starts at one year.
Does Sober Girl track months?
It shows days, hours and weeks, and unlocks badges at 1, 3, 7, 14, 30, 60, 90, 180 and 365 days.
Sources
- NIAAA Recovery Research Definitions. NIAAA. Research definitions for remission and recovery from alcohol use disorder, with duration bands.
- About Dry January. Alcohol Change UK.
- What Is A Standard Drink?. NIAAA.
- Alcohol Consumption and Obesity: An Update. Traversy G, Chaput JP. Current Obesity Reports, 2015. A review. It reports that alcohol provides 7 kcal per gram and that the evidence on weight is mixed.
How we write these. Every figure above links to the source it came from, and we label self-reported and observational results as such. Where we could not find a source we trust, the page says so instead of filling the gap. Sober Girl is made by ShipAI Lab and this is not medical advice. Sources were checked on 6 October 2026. If you spot an error, email us at integrateopenai@gmail.com.
Keep reading
Today is day one.
Sober Girl is a private sobriety tracker for women, on Android now and coming soon to iPhone: day counter, money saved, craving SOS and a tree that grows with you. Free to start.