⭐ Mindrink Methodology: How We Define Alcohol Limits, Units, and Risk Levels
This page explains exactly how Mindrink calculates alcohol units, how we define limits, which international guidelines we rely on, and what parts of our model are derived.
Our goal is transparency: you should always know where the numbers come from and what they mean for real life.
1. What is an alcohol unit?
Mindrink uses a simple, internationally recognised definition:
1 unit = 10 grams of pure alcohol
This system is used by WHO, Australia, Ireland, and many major research studies.
It allows all drinks — beer, wine, spirits, cocktails — to be compared on the same scale.
To estimate units:
Units = (Volume in ml × ABV% × 0.789) ÷ 10
Mindrink calculates this automatically, but here are quick examples:
- Beer (568 ml, 5%) → ~2.2 units
- Wine (175 ml, 12%) → ~1.7 units
- Spirits (25 ml, 40%) → ~0.8 units
Different countries count units differently.
For a deeper explanation, see our What counts as a drink guide.
2. Meaning of the colours
Mindrink uses colours to help you quickly interpret your drinking patterns:
-
🟦 Blue — Within guideline
You are within your selected limit (Strict, Balanced, Relaxed). -
🟣 Purple — Above guideline, but not high risk
You exceeded your daily or weekly guideline,
but have not reached binge or high-week levels. -
🔴 Red — High risk
Binge drinking which is harmfull for health
Colours are a simple interpretation layer — not a medical diagnosis.
3. Full table of limits
(All values in units; 1 unit = 10 g)
| Tier | Sex | Daily ≤ (blue) |
Daily binge ≥ (red) |
Weekly ≤ (blue) |
Weekly high ≥ (red) |
Monthly ≤ (≈) |
Monthly high ≥ (≈) |
Source |
|---|---|---|---|---|---|---|---|---|
| Strict | Men | 2 | 7 | 5 | 20 | 20 | 80 | Canada CCSA 2023 |
| Strict | Women | 2 | 6 | 5 | 20 | 20 | 80 | Canada CCSA 2023 |
| Balanced | Men | 4 | 7 | 10 | 20 | 40 | 80 | Australia NHMRC 2020 |
| Balanced | Women | 4 | 6 | 10 | 20 | 40 | 80 | Australia NHMRC 2020 |
| Relaxed | Men | 4 | 7 | 17 | 20 | 68 | 80 | Ireland HSE |
| Relaxed | Women | 4 | 6 | 11 | 20 | 44 | 80 | Ireland HSE |
4. Official Public-Health Sources We Use
A. Values Taken Directly From Official Public-Health Sources
These are the guideline components Mindrink uses exactly as published, with one harmonisation step:
everything is converted into Mindrink units = 10 g ethanol so different national systems can be compared directly.
Below are the original values, the logical conversions, and why each source is part of Mindrink's model.
1. Strict level — Canada (CCSA 2023)
Source: Canadian Centre on Substance Use and Addiction (2023)
Canada does not present a single "safe limit."
Instead, it defines risk bands based on burden-of-disease modelling:
- 0–2 drinks/week → Low risk
- 3–6 drinks/week → Moderate risk
- 7+ drinks/week → Increasingly high risk
Canada defines a standard drink as:
13.45 g ethanol
Conversion to Mindrink units
Low-risk band (0–2 drinks/week):
2 × 13.45 g = 26.9 g → 2.7 units
Moderate-risk band (3–6 drinks/week):
3 drinks = 40.35 g → 4.0 units
6 drinks = 80.7 g → 8.0 units
So Canada's modelling translates into:
- Low risk: ~0–2.7 units
- Moderate risk: ~4–8 units
- Higher risk: >8 units/week
How Mindrink uses this
Canada's guideline is the most conservative internationally.
To create a practical but scientifically grounded strict tier, Mindrink sets:
Strict weekly limit = ≤ 5 units/week
5 units/week:
- Sits near the lower part of Canada's moderate band
- Is far below Australia's 10/week and Ireland's 17/11
- Represents a very low exposure level users can realistically track
Why included
- It is the most rigorous contemporary guideline
- It provides a risk curve rather than a rigid limit
- It anchors Mindrink's "Strict" tier in modern epidemiological evidence
2. Balanced level — Australia (NHMRC 2020)
Source: National Health and Medical Research Council (2020)
Australia gives a clear, easily interpretable guideline:
- ≤ 10 standard drinks per week
- ≤ 4 standard drinks on any single day
An Australian standard drink is defined as:
10 g ethanol
Conversion to Mindrink units
Direct mapping:
- 10 drinks/week → 10 units/week
- 4 drinks/day → 4 units/day
Why included
- Provides both daily and weekly caps
- Already uses 10 g drinks, identical to Mindrink units
- Forms the structural backbone of the Balanced tier
3. Relaxed level — Ireland HSE
Source: HSE Low-Risk Drinking Guidelines
Ireland provides higher, sex-specific weekly limits:
- Men: ≤ 17 standard drinks/week
- Women: ≤ 11 standard drinks/week
Ireland defines:
1 standard drink = 10 g ethanol
Conversion to Mindrink units
- Men: 17 × 10 g = 17 units/week
- Women: 11 × 10 g = 11 units/week
Why included
- Offers a more permissive option for users seeking flexible guidance
- Completes a clear 3-tier model (Strict → Balanced → Relaxed)
- Matches the global 10 g standard drink convention
4. Binge definitions — NIAAA (USA) & WHO
NIAAA (USA) binge criteria
- Women: ≥ 4 US drinks in ~2 hours
- Men: ≥ 5 US drinks in ~2 hours
US drink = 14 g ethanol
Conversions:
- Women: 4 × 14 g = 56 g → 5.6 units
- Men: 5 × 14 g = 70 g → 7 units
Rounded Mindrink thresholds:
- Women: ≥ 6 units/day
- Men: ≥ 7 units/day
WHO heavy episodic drinking (HED)
≥ 60 g ethanol in one occasion
→ 6 units
Why included
Both NIAAA and WHO align around ~60–70 g as the level where acute harms sharply increase
(injuries, poisoning, arrhythmia, self-harm, violence, falls).
These values define the Mindrink red zone for single-day consumption.
5. Values Mindrink Derives (to Create a Unified Model)
Official drinking guidelines differ widely:
- some give weekly limits but not daily ones
- some define binge, others do not
- some apply to men and women equally, others do not
- none offer monthly thresholds
- they use different definitions of a "standard drink"
To create a single, coherent, easy-to-understand system, Mindrink derives a small number of values.
These derivations are transparent, minimal, and grounded in public-health reasoning.
1. Daily Limits for Strict, Balanced, and Relaxed
Why we derive daily limits
Canada (Strict tier) and Ireland (Relaxed tier) only specify weekly guidance.
Without daily caps, users cannot interpret whether an individual day is reasonable or approaching binge-like behaviour.
Strict tier — 2 units/day (derived)
Strict represents very low exposure, anchored in Canada's modelling:
-
0–2 Canadian drinks/week = low risk
→ ≈ 0–2.7 units/week -
3–6 drinks/week = moderate risk
→ ≈ 4–8 units/week
A daily limit of 2 units/day ensures that even occasional heavier days do not accumulate into moderate- or high-risk weekly patterns.
Strict daily blue limit = 2 units/day
This keeps Strict genuinely strict — lower than any official national limit.
Balanced & Relaxed — 4 units/day (from Australia)
Australia (NHMRC 2020) is the only major guideline providing an explicit evidence-based daily limit:
≤ 4 drinks/day
= 4 units/day
Mindrink applies this to both tiers for consistency:
- Balanced daily blue = 4 units/day
- Relaxed daily blue = 4 units/day
Daily limit summary
| Tier | Daily blue limit |
|---|---|
| Strict | 2 units/day |
| Balanced | 4 units/day |
| Relaxed | 4 units/day |
2. Weekly High-Risk Threshold ("Red Week")
Why we derive this
No guideline defines a universal "high-risk week."
But large cohort studies identify clear risk acceleration beyond certain thresholds.
Scientific basis
Key studies include:
- Wood et al., Lancet 2018 — pooled analysis of 599,912 drinkers
- WHO Global Burden of Disease modelling
Both show:
- Noticeable increased risk around 100 g/week, and
- Sharp risk elevation beyond ~200 g/week
Mindrink derivation
Weekly red threshold = ≥ 20 units/week
(20 × 10 g = 200 g ethanol)
This is the point where risk curves consistently steepen across studies.
It does not represent a recommended limit — it is a risk flag for weekly analysis.
3. Unisex Strict & Balanced Tiers
Why
Both:
- Canada 2023 (risk bands)
- Australia 2020 (10/week, 4/day)
are sex-neutral.
Adding artificial differences where none exist would both distort the science and complicate interpretation.
Mindrink's approach
- Strict weekly limit = unisex
- Balanced weekly limit = unisex
- Relaxed weekly limits = sex-specific (as per Ireland)
- Binge thresholds = sex-specific (as per NIAAA)
This keeps everything aligned with the underlying sources.
4. Colour Zones (Interpretation Layer)
Mindrink uses a simplified colour scheme to make patterns easy to understand at a glance:
- 🟦 Blue — Within your limit (daily & weekly)
- 🟣 Purple — Above your limit but not in high-risk territory
-
🔴 Red — High-risk exposure:
- Binge day
- Women ≥ 6 units
- Men ≥ 7 units
- Heavy week: ≥ 20 units
Why we derive this
Guidelines are numeric, not visual.
Colours help users understand their trends instantly without interpreting raw numbers.
This is a communication tool, not a diagnostic category.
5. Monthly Limits (Derived for Trend Analysis)
Why
No public-health guideline provides monthly alcohol limits.
But Mindrink includes monthly and long-term charts, which require a reference point.
Derivation
A clear and transparent rule:
Monthly limit = Weekly limit × 4
Examples:
| Tier | Weekly | Monthly (derived) |
|---|---|---|
| Strict | 5 | 20 |
| Balanced | 10 | 40 |
| Relaxed (men) | 17 | 68 |
| Relaxed (women) | 11 | 44 |
Monthly limits are always labelled as derived, never official.
6. Limits vs. Real Life
Mindrink's limits are guidance tools, not rules to follow perfectly.
Health guidelines describe risk ranges, not personal obligations.
Real life is more complex than weekly numbers:
some days are social, some stressful, some celebratory, some quiet.
Patterns shift over months and years. That's normal.
Mindrink is built on a simple principle:
The value isn't in being perfect.
The value is in being aware.
What matters is not hitting every target, but understanding your relationship with alcohol over time:
- noticing when your consumption rises or falls
- recognising situations that increase drinking
- seeing how alcohol affects sleep, energy, or mood
- making choices that fit your own goals, not someone else's
Mindrink never labels you, never shames you, and never treats limits as moral boundaries.
Our philosophy is straightforward:
Guidance, not guilt.
Awareness, not judgment.
You decide what "healthy" looks like for your life.
We provide the numbers so you can make informed decisions —
not so the numbers can make decisions for you.
7. Full Reference List (with Links)
Canada — CCSA (2023)
Canada's Guidance on Alcohol and Health
https://www.ccsa.ca/canadas-guidance-alcohol-and-health
Australia — NHMRC (2020)
Australian Guidelines to Reduce Health Risks from Drinking Alcohol
https://www.nhmrc.gov.au/health-advice/alcohol
Ireland — HSE Low-Risk Drinking Guidelines
Weekly low-risk alcohol guidelines
https://www2.hse.ie/living-well/alcohol/health/improve-your-health/weekly-low-risk-alcohol-guidelines/
USA — NIAAA (Rethinking Drinking)
Rethinking Drinking
https://www.rethinkingdrinking.niaaa.nih.gov/
WHO — Global Status Report on Alcohol and Health
Global Status Report on Alcohol and Health
https://www.who.int/publications/i/item/9789241565639
(Most recent full edition: 2018; methodology continues to be used in current WHO alcohol monitoring.)
Lancet (2018) — Risk Thresholds for Alcohol Consumption
Wood et al., Lancet 2018
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(18)30134-X/fulltext
No level of alcohol is completely safe (WHO 2023). These ranges show lower risk, not safety. Mindrink provides general educational information and does not give medical advice. If you have concerns about your drinking, please consult a clinician or local support service.