Beer calculator
True Cost of Beer(s)
Pick the exact pour, strength, sex profile, and number of beers to see the alcohol load, calories, water loss, estimated clearance time, and sleep trade-offs right away.
Input parameters
Choose your beer
Change the pour, strength, count, sex profile, and optional weight. The details update instantly without forcing you to chase the result around the page.
Pick the exact serving size first. Beer names vary by country, but the volume stays precise.
Choose the alcohol band for this pour. The math below keeps the same beer formulas.
Use the slider to match the total number of beers in this session.
Optional personalization. Weight changes the relative load estimate.
Your beer at a glance
1 x US Pint at 5% ABV
Estimated clearance window
1 hr 52 min
For the selected Men profile, this session contains about 18.7 g of pure alcohol and may take around 1 hr 52 min to clear. REM may start about 21 min later, and the drink load pushes about 187 ml of extra water loss.
Alcohol
18.7 g
Calories
199 kcal
Sleep delay
21 min
Water loss
187 ml
Details
1 x US Pint at 5% ABV
Clears in about 1 hr 52 min
Alcohol
18.7 g
Calories
199 kcal
Sleep delay
21 min
Water loss
187 ml
03
Sleep tax
21 min later
Body timeline
Tap through the night to see what changes
Choose a time point to see what the body is likely doing, how much alcohol is still being cleared, and what that part of the night may feel like.
Current checkpoint
30 min
Current stage
Absorption
What you may notice
You may feel relaxed, warmer, or sleepier fairly quickly.
What your body is doing
Alcohol is still climbing in the bloodstream and sedation starts to show up before full clearance catches up.
Sleep terms in plain English
What REM delay actually means
REM stands for rapid eye movement sleep, which is the dream-heavy part of the night. Alcohol often makes you sleepy early, then pushes REM later and can leave the second half of the night more broken up. If you want the deeper background, use the REM overview , the Harvard sleep explainer , and the REM timing review .
1. You may fall asleep faster [4]
Alcohol can act like a short-term sedative, so bedtime can feel easier than usual.
That is what the REM delay number means. The dream-heavy part of sleep gets pushed back.
Global standards
Beer size changes by country, not by name alone
The alcohol grams column updates when you switch strength, so the table doubles as a quick traveler cheat sheet.
Standard Bottle
US standard
Volume
355 ml
Alcohol @ current strength [9]
14 g
Region
US standard
Compared with your pick
25% smaller
Euro Bottle / Can
Europe
US Pint
United States
Volume
473 ml
Alcohol @ current strength [9]
18.7 g
Region
United States
Compared with your pick
Your selected serve
German "Halbe"
Germany / Central Europe
Volume
500 ml
Alcohol @ current strength [9]
19.7 g
Region
Germany / Central Europe
Compared with your pick
6% larger
UK / Imperial Pint
United Kingdom / Ireland
Volume
568 ml
Alcohol @ current strength [9]
22.4 g
Region
United Kingdom / Ireland
Compared with your pick
20% larger
Bavarian "Maß"
Bavaria / Oktoberfest
Volume
1,000 ml
Alcohol @ current strength [9]
39.5 g
Region
Bavaria / Oktoberfest
Compared with your pick
111% larger
Spanish "Cana" / Cologne "Stange"
Spain / Cologne
Volume
200 ml
Alcohol @ current strength [9]
7.9 g
Region
Spain / Cologne
Compared with your pick
58% smaller
Calculations
The math behind the page
These formulas drive the live results, and each card shows the exact numbers from your current selection.
Calculations
The math behind the page
These formulas drive the live results, and each card shows the exact numbers from your current selection.
Pure alcohol [9]
Ethanol density converts the chosen pour into grams, which is the biologically useful unit for metabolism and sleep-impact modeling.
Using your current selection
Pour
1 beer
Strength
5% ABV
Total volume
473 ml
Pure alcohol
18.7 g
Light-strength beer uses a 1.5% carb ratio, standard-strength 3.6%, and high-strength 4.5%.
Using your current selection
Carb ratio
3.6 g per 100 ml
Carbs
17 g
Alcohol calories
131 kcal
Total calories
199 kcal
Water tax [3]
Net hydration balance = total liquid volume minus the estimated extra water lost through the alcohol-driven diuretic effect.
Using your current selection
Water loss
187 ml
Net hydration
+286 ml
Replacement target
0.7 glasses
Drink volume
473 ml
Weight changes the relative dose estimate, while the clearance window follows the selected sex model you chose in the dashboard.
Using your current selection
Sex model
Men
Clearance rate
10 g/hr
Pure alcohol
18.7 g
Estimated time
1 hr 52 min
Worked example
A practical beer scenario
This worked example turns the live beer choice into the kind of quick line-by-line explanation a reader can scan before they move into sources or legal notes.
Worked example
A practical beer scenario
This worked example turns the live beer choice into the kind of quick line-by-line explanation a reader can scan before they move into sources or legal notes.
Scenario
1 x US Pint at 5% ABV
| Order | 1 x US Pint at 5% ABV |
|---|---|
| Pure alcohol | 18.7 g |
| Calories | 199 kcal |
| Water balance | 187 ml lost, +286 ml net |
| Estimated clearance | 1 hr 52 min |
| Sleep effect | 21 min REM delay |
Sources
Reference directory
Every inline marker above points back to one of the references below.
Sources
Reference directory
Every inline marker above points back to one of the references below.
USDA FoodData Central
[1]Calories, Carbs, and Nutrition Values
Baseline calorie and carbohydrate references for standard beers.
American Chemical Society
[2]Sugar Elimination and Fermentation Science
Brewing yeast consumes the simple sugars, leaving mostly dextrins rather than meaningful simple sugar in finished beer.
Mayo Clinic
[3]Dehydration Mechanism and Water Tax
Explains the vasopressin suppression pathway that makes alcohol act as a diuretic.
Harvard Health Publishing
[4]Sleep Disruption and REM Suppression
Summarizes how alcohol speeds sleep onset but fragments later sleep and suppresses REM.
Sleep Medicine Reviews / PubMed
[5]REM Delay Meta-analysis
Meta-analysis used for the REM delay and REM suppression reference ranges.
PLOS Digital Health
[6]Wearable Cardiovascular Sleep Study
Large-scale biometric data showing alcohol raises sleeping heart rate and suppresses HRV.
Oura
[7]Oura Alcohol and Sleep Analysis
Aggregate wearable data used for overnight HRV drop and sleeping heart-rate shift context.
WHOOP
[8]WHOOP Recovery Effects
Real-world recovery trends used to describe sympathetic activation and fragmented sleep.
NIAAA
[9]Alcohol Metabolism Mechanics
Clinical background for ADH and ALDH processing and flat-rate alcohol oxidation.
NIAAA
[10]Women and Alcohol
Context for lower total body water, lower gastric ADH, and higher peak alcohol concentration in women.
Note: These outputs are educational estimates for informational purposes only for people aged 18+, not a legal impairment meter, drink-driving guide, or medical advice tool. [Read Full Terms & conditions]
Calculator terms and conditions
This page is an educational information tool and not a medical service.
Calculator terms and conditions
This page is an educational information tool and not a medical service.
1. General & Educational Purpose Only
This tool is an informational and educational estimator, not a medical device, clinical service, or diagnostic tool. It is designed solely to illustrate broad, population-level patterns around ethanol dose, hydration strain, recovery load, sleep disruption, and spirit roughness based on user-selected inputs.
2. Clinical & Biological Limitations
Individual alcohol metabolism varies drastically based on factors not captured by this tool, including but not limited to: prescription or over-the-counter medications, biological sex, personal tolerance, liver and kidney function, recent food and water intake, pregnancy or nursing status, sleep debt, underlying health conditions, and genetic enzyme variations (such as ADH and ALDH polymorphisms). Output data does not reflect your specific physiological state.
3. No Medical Advice or Emergency Care
Nothing on this website constitutes professional medical advice, examination, diagnosis, or treatment. Never disregard or delay seeking professional medical advice because of an output from this calculator.
- If you believe you or someone else is experiencing alcohol poisoning, an adverse drug interaction, or any medical emergency, call your local emergency services (e.g., 911, 999, 112) or go to the nearest emergency room immediately.
- If you have concerns regarding alcohol dependence or substance use, please consult a licensed healthcare professional or contact a national substance support helpline.
4. Driving, Operating Machinery, and Safety-Critical Tasks
Never use this calculator to determine whether you are fit, safe, or legally permitted to drive, operate machinery, work, or supervise others.
Outputs are purely theoretical estimates and cannot predict blood alcohol concentration (BAC) or physical/cognitive impairment accurately. This tool cannot be used as evidence, verification, or a legal defense against driving under the influence (DUI/DWI) or any safety violation.
5. Age Requirement and Lawful Use
This calculator contains alcohol-related educational material and is intended exclusively for individuals who are at least 18 years of age or the legal drinking age in their jurisdiction, whichever is greater. Use of this calculator does not encourage, condone, or promote alcohol consumption, binge drinking, underage drinking, or any unlawful conduct.
6. "As Is" Warranty Disclaimer
To the maximum extent permitted by applicable law, this calculator and its outputs are provided on an "AS IS" and "AS AVAILABLE" basis without warranties of any kind, whether express, implied, or statutory, including but not limited to warranties of accuracy, completeness, reliability, fitness for a particular purpose, or non-infringement.
7. Limitation of Liability
To the fullest extent permitted by applicable law, the site owner, creators, contributors, and data providers shall not be liable for any direct, indirect, incidental, consequential, special, punitive, or reliance-based damages, losses, personal injury, property damage, fines, or legal penalties arising out of or in connection with your use of, or inability to use, this calculator. You assume full, sole responsibility for any decisions made or actions taken based on these outputs.