Singapore

Singapore Drink Driving Limit & Sober Time Calculator 🇸🇬

Calculate your blood alcohol content and see whether you're under Singapore's 80mg/100ml drink-driving limit. Our BAC calculator estimates your units and sobriety time.

0.8 ‰ Drink-drive limit

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ℹ️ Information

CONTEXT
🌎 Country
Show results in
ABOUT YOU
Sex
⚖️ Weight

lbs

⏱️ Start time of drinking (optional) Time of your first drink (not required)

🕒

⏳ Or: hours ago —
0h6h12h18h24h

🍹🍸🍺 Drinks

Drink {{index+1}} 🍷

%

Maximum number of drinks reached.

The results will show up here...
📈 Results
Current BACPeak BAC {{ initialSobriety }}{{ unitSign }} Measured for Now · Drink-drive limit {{ countryLimit }}{{ unitSign }}
Status:
Over the legal limit – driving is illegal. Approaching the legal limit – driving not advised. Likely under the limit, but drive with care.
{{ legalLimitTimeLabel }}

Drink-drive limit

{{ countryLimit }}{{ unitSign }}
Based on Singapore law ·

Elimination rate

{{ decayRateDisplay }}{{ unitSign }} / h
Typical average

Standard Drinks

{{ standardDrinks }}🍺
Approx. consumed

Pure Alcohol

{{ results.length > 0 ? results[0].pureAlcoholMl : '0' }} {{ qunits }}
Pure alcohol consumed

Pure Alcohol (g)

{{ alcoholGrams }} g
Total ethanol consumed

Calories

{{ calories }} kcal
From alcohol only — mixers add more

Time over limit

{{ timeOverLimit || '0m' }}
Estimated duration above the legal driving limit
For your own safety, we recommend using a rate no higher than the average.
Current BACPeak BAC {{ initialSobriety }}{{ unitSign }} Measured for Now · Drink-drive limit {{ countryLimit }}{{ unitSign }}
Status:
Over the legal limit – driving is illegal. Approaching the legal limit – driving not advised. Likely under the limit, but drive with care.
{{ legalLimitTimeLabel }}
{{ afterLabel }} {{ $t('unit.' + units) }} Status
{{ result.time }} {{ result.drunkenness }}
  • Likely under the limit, but drive with care.
  • Approaching the legal limit – driving not advised.
  • Over the legal limit – driving is illegal.
Create a pop-up notification
📉 Sobriety Over Time
👮 Health impact and legal consequences
{{ item.title }}
{{ legalLimitTimeLabel }} Sober in: {{ sobrietyTime }} Peak BAC: {{ peakBAC }}

💡 Advice: drink water, eat, and avoid driving until you are under the legal limit and ideally fully sober.

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Attention‼️ The results are only approximate, so make sure you are sober before driving.

About results
Current BAC

Your Current BAC shows your estimated blood alcohol concentration right now. This number reflects how much alcohol is in your bloodstream and is used to assess impairment.

Legal limit

In Singapore, the drink drive limit is 80mg of alcohol per 100ml of blood (about 0.08% BAC, or 35µg per 100ml of breath). Exceeding it is a criminal offence with severe penalties.

Elimination rate

This shows the assumed average rate your body metabolizes alcohol — typically ~0.015% BAC per hour. It’s an estimate of how fast your BAC decreases over time.

Standard Drinks

The number of Standard Drinks represents the approximate number of typical servings you’ve consumed (e.g., one beer, glass of wine, or shot), based on local standards for drink size.

Pure Alcohol

This is the amount of pure alcohol your body has absorbed so far, giving you a measure of total alcohol consumed.

Time vs. Sobriety Table

The table lists how your BAC is expected to change with each hour passed — and when a Start time of drinking is provided, it aligns these estimates with the exact time of day you began drinking. For example, if you started at 6:00 PM, the column will show your projected BAC at 6:00 PM (Now), 7:00 PM (1h), 8:00 PM (2h), etc., so you can clearly see when your BAC is likely to cross legal and safer thresholds as the day progresses. Icons or status indicators show whether the level is safe for driving at those specific clock times, making it easier to plan your departure or rest period.

Sobriety Over Time Graph

A visual line chart plotting your estimated BAC decline over hours. It helps you see when your BAC drops below legal and safer levels.

How Alcohol Affects You

This reference table shows ranges of BAC and typical effects on your body and behaviour — from mild alertness changes to significant impairment at higher levels.

Legal limit reached in / Sober in / Peak BAC

These summaries give quick key estimates:

  • Legal limit reached in: the time until your BAC likely falls below the legal driving limit.

  • Sober in: total time until BAC reaches ~0.000.

  • Peak BAC: the highest BAC value recorded in the session.

Singapore Drink Drive Limit & Alcohol Calculator Data

Five factors that determine your result

Weight
Body weight determines how alcohol distributes in the body — more weight means a lower blood alcohol concentration.
Sex
Men and women metabolise alcohol at different rates because of differences in body water content.
Amount
The amount of pure alcohol consumed is the main factor that determines your BAC result.
Strength
A higher strength (%) means more ethanol in the same drink serving.
Time
The time of your first drink shows how BAC changes hour by hour and when you'll be sober again.

How much does Singapore drink?

Alcohol consumption per adult, per year

2.0L

litres of pure alcohol per adult (15+), per year

Per adult, that is roughly:

80 beers ≈ 2/week
111 glasses of wine ≈ 2/week
125 shots ≈ 2/week
2.0 L
0.1 L Ø 4.2 11.2 L

52% below the regional average

Ranks #15 of 25 in Western Pacific Ranks #137 of 188 in the World Average in Western Pacific: 4.2 L

How neighbours compare

#1 Australia 11.2L #1 Western Pacific
#2 Thailand 7.6L #1 South-East Asia
#3 Japan 6.3L #7 Western Pacific
#4 India 4.5L #3 South-East Asia
#5 Singapore 2.0L #15 Western Pacific
#6 Malaysia 0.8L #20 Western Pacific
LIMITS NEARBY

BAC limits in neighbouring countries

Explore the legal blood alcohol concentration (BAC) limits for drivers in neighbouring countries.

MY

Malaysia

0.5‰
Moderate
TH

Thailand

0.5‰
Moderate
AU

Australia

0.5‰
Moderate
JP

Japan

0.3‰
Strict
IN

India

0.3‰
Strict

Drink Driving Limit in Singapore

Drink-drive limit in Singapore (Road Traffic Act)

Blood limit (all drivers)
80mg/100ml
Relaxed
Breath limit (all drivers)
35µg/100ml
Relaxed
Singapore's prescribed limit is 80 mg of alcohol per 100 ml of blood (about 0.08% BAC), or 35 µg per 100 ml of breath, under the Road Traffic Act. This is one of the higher limits in the region — many drivers are impaired well before they reach it. A separate "driving under the influence" offence can apply at any level if you are unfit to drive, so the only safe amount before driving is none.

Drink Driving Penalties & Alcohol Limit Singapore

Consequences of exceeding Singapore's 80mg/100ml drink-drive limit

80 mg/100ml and over (0.08% BAC)
  • Drink-driving offence under the Road Traffic Act
  • Substantial fine and a mandatory driving disqualification
  • Possible imprisonment, especially with a high reading
Repeat offence / accident / very high reading
  • Heavier fine and a much longer or indefinite disqualification
  • Imprisonment far more likely
  • Causing hurt or death is treated as a grave offence with the most severe penalties

Source: Singapore Police Force (Traffic Police) and the Road Traffic Act

Tips for Responsible Drinking & Morning After Calculator

Practical tips for safer drinking

Pace yourself
Stick to the "one drink per hour" rule – your liver needs time to process alcohol.
Eat before and while drinking
A solid meal slows alcohol absorption – an empty stomach raises BAC faster.
Drink water
After each alcoholic drink, have a glass of water – it reduces dehydration and health risks.
Don't drive
Even small amounts of alcohol impair reaction time. If in doubt, take a taxi or stay overnight.

Source: Singapore Health Promotion Board and the Health Hub

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