Alcohol Taper Schedule Calculator

How this alcohol taper schedule calculator works

Day 0 is your start date, at the amount you drink on a typical day now. The last day is your target date: your quit day if the target is 0, or the day you reach a lower number. Every day in between gets a target on one straight line between the two:

target on day d = now − (now − target) × d ÷ days in the plan

Each target is rounded up to the next half drink, so the plan never asks you to cut faster than the line. That has three effects. Some days repeat when the daily cut is less than half a drink. Every day before your target date stays above your target, so the target date is always the first day you’re at it. And the line starts falling straight after day 0, but the first visible cut can come a day or more later.

Take the plan that loads with the page: 6 standard drinks a day, down to 0 over 14 days. The line drops about 0.43 drinks a day, or 3 a week. Rounded up, the targets run 6, 6, 5.5, 5, 4.5, 4, 3.5, 3, 3, 2.5, 2, 1.5, 1 and 0.5, then 0 on your quit day. Day 1 is still 6, so the first cut you see is on day 2. The totals add up the table and compare it with staying at your usual amount for the same 15 days: 48 drinks instead of 90, which is 42 fewer, or 47%.

A straight line has one weak spot. Every cut is the same size, so the last few are a bigger share of what’s left. Going from 3 to 2.5 drops a sixth of what you’re drinking. Going from half a drink to none drops all of it. If the end feels harder than the start, a later target date makes every step smaller.

Count in standard drinks

The plan only works if you count the same way every day, and the warnings on this page only make sense in standard drinks. In the US, a standard drink has about 14 grams (0.6 fl oz) of pure alcohol (NIAAA). Each of these is one:

For anything else, multiply the size in ounces by the ABV and divide by 60. A 16 oz pint of 7% IPA is 16 × 7 ÷ 60 ≈ 1.9 standard drinks. A 9 oz pour of 13.5% wine is about 2. The “Not sure how many standard drinks?” box in the calculator does this sum and rounds up to the next half drink.

This matters for more than the table. A pint of strong IPA or a heavy home pour is often close to 2 standard drinks, so counting cans or glasses can put you past the warning lines below sooner than you’d think. Pick one way of counting and keep it for the whole plan.

When to talk to a doctor before you taper

Withdrawal can start when you cut down, not only when you stop (ASAM). Talk to a doctor before you start a taper if any of these apply:

• You drink 4 or more standard drinks every day. NIAAA defines heavy drinking as 4 or more standard drinks on any day or 8 or more a week for women, and 5 or more on any day or 15 or more a week for men. The calculator doesn’t ask your sex, so it uses the lower daily figure. Four standard drinks a day, every day, is 28 a week, above both weekly levels.
• You get shaky, sweaty, sick or anxious a few hours after your last drink, or need a drink to feel normal. The NHS says to get medical help before you try to stop if you get withdrawal symptoms.
• You’ve ever had a seizure, seen or heard things that weren’t there, or had DTs (delirium tremens) when you stopped or cut down. NICE and ASAM both list this among the risk factors for a dangerous withdrawal.

UK guidance from NICE sets two higher lines, in UK units. One UK unit is 8 grams of alcohol (NHS) and a US standard drink is about 14, so:

• More than 15 UK units a day (120 g, about 8.6 US standard drinks): consider offering an assessment for medically assisted withdrawal.
• More than 30 UK units a day (240 g, about 17 US standard drinks): consider withdrawal in a hospital or residential unit.

Staying under these lines isn’t a promise that a taper is safe. Averaging just over 1 standard drink a day (8 a week) crosses NIAAA’s weekly heavy-drinking level for women, and just over 2 a day (15 a week) crosses it for men. That’s why the “Before you start” notice shows for everyone.

Withdrawal symptoms usually start 6 to 12 hours after the last drink and last 3 to 7 days (NHS), and they tend to peak at 24 to 72 hours (MedlinePlus). Call 911 or go to the ER for a seizure, a fever, severe confusion, hallucinations or an irregular heartbeat.

In medical care, withdrawal is usually managed with medicine rather than by tapering alcohol. NICE’s community programmes use a fixed-dose medicine regimen that steps down to zero over 7 to 10 days. That’s a medication taper, not an alcohol one.

NIAAA’s Rethinking Drinking says quitting is a better choice than cutting down if:

• you’ve tried to cut down but can’t stay within the limits you set
• you have alcohol use disorder, or symptoms of it, now
• you have a health condition caused or made worse by drinking
• you take a medicine that interacts with alcohol
• you’re pregnant or might become pregnant

Free, confidential help is available 24/7 from SAMHSA’s National Helpline at 1-800-662-4357.

How fast to cut back, and how to stick to the plan

There’s no single agreed rate for cutting down at home. Three sources are quoted often, and they’re far apart:

• HAMS, a harm-reduction group, uses 2 standard drinks a day.
• University Hospitals Sussex (NHS) suggests cutting by 10% every four days. If symptoms appear, it says to go back to the amount where you were stable, then cut by 10% a week.
• Surrey and Borders Partnership (NHS) says no more than 10% a day, and slower still above 25 UK units a day (about 14 US standard drinks).

At 10 standard drinks a day, those work out to 2 drinks a day, about a quarter of a drink a day and 1 drink a day. None of them is a medical prescription, which is why the calculator lets you pick the date rather than the pace. It flags any plan that cuts more than 10% of your starting amount a day, the faster of the two NHS rates.

If your target is above zero, this page doesn’t suggest a number. What makes sense depends on your health, and a doctor can help you choose it.

Some days won’t go to plan. If you drink more than the target, pick up at the next day’s target rather than cutting extra to make up for it, because a big drop is exactly what a taper tries to avoid. If you feel shaky, sweaty or sick as the targets fall, don’t push through. Call a doctor, and call 911 for severe symptoms. A slip doesn’t wipe out your progress. Here’s what to do with your sober date after a relapse.

If you’re tapering to zero, Sober44 follows the same kind of straight-line plan to a quit date you set, with a card for each day’s target and morning reminders for the week ahead. It counts servings of your own drink from your drink profile rather than US standard drinks, and its plan always ends at zero, so its daily numbers can differ from this table. To put a price on the drinks you’d skip, try the alcohol spending calculator.