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Free alcohol unit calculator. Enter serving volume (mL or US fl oz), ABV %, and drink count to get grams of ethanol plus US standard drinks (14 g), UK NHS units (10 ml ethanol), and Australian standard drinks (10 g). Educational — not medical or legal advice.
Last updated: May 24, 2026
Homebrew ABV from gravity? ABV calculator
One glass, can, or shot—multiply with “number of drinks” if identical.
Summary
About 14 g pure ethanol (17.74 ml) — roughly 1 US standard drink(s) (14 g), 1.77 UK unit(s) (10 ml ethanol), 1.4 AU standard drink(s) (10 g). Definitions differ by country; use one system consistently.
Pure ethanol
14 g
Total beverage
354.88 mL
US standard drinks
1
~14 g ethanol each
UK units
1.77
10 ml ethanol each
AU standard drinks
1.4
~10 g ethanol each
Not medical or legal advice. Pregnancy, medications, driving laws, and health conditions change what is safe—follow local limits and your clinician.
Same ethanol, three national counting systems — why 1.0 US drink can read 1.77 UK units on the same pour.
Default beer → 14 g (17.74 mL pure ethanol) from 354.88 mL beverage.
Default → 1 US drink(s) — matches NIAAA teaching glass for 5% beer.
Same pour → 1.77 UK units · 1.4 AU drinks.
12 US fl oz @ 5% ABV × 1 drink
Ethanol
14 g
US drinks
1
UK units
1.77
AU drinks
1.4
Total mL
354.88
| Region | Unit | Per unit | Formula (this tool) |
|---|---|---|---|
| United States (NIAAA teaching) | Standard drink | ~14 g (~17.7 ml pure ethanol) | US drinks = ethanol (g) ÷ 14 |
| United Kingdom (NHS) | Alcohol unit | 10 ml pure ethanol | UK units = pure ethanol (ml) ÷ 10 |
| Australia (labeling) | Standard drink | ~10 g ethanol | AU drinks = ethanol (g) ÷ 10 |
total mL = (volume per serving in mL) × drink countethanol mL = total mL × (ABV / 100)ethanol g ≈ ethanol mL × 0.789US = g / 14 · UK = ethanol mL / 10 · AU = g / 10Default walkthrough: 12 fl oz → 354.88 mL → × 5% = 17.74 mL ethanol → × 0.789 = 14 g → US 1.0, UK 1.77, AU 1.4.
| Drink | Volume | ABV | Note |
|---|---|---|---|
| Regular beer (US can) | 12 US fl oz | 5% | ≈1.0 US standard drink in this model |
| Wine (restaurant glass) | 5 US fl oz | 12% | ≈1.0 US standard drink — same ethanol as beer example |
| Distilled spirits (shot) | 1.5 US fl oz | 40% | ≈1.0 US standard drink — smaller volume, higher ABV |
| UK pint (cask ale) | 568 mL | 4.5% | ≈1.44 US drinks / ~2.56 UK units per pint |
| Strong IPA | 16 US fl oz | 7% | ≈1.87 US drinks — ABV matters more than “one beer” |
| Double vodka soda | 2 × 1.5 fl oz | 40% | ≈2.0 US standard drinks — count each shot |
| Source | Often cited | In this calculator |
|---|---|---|
| US (NIAAA — men, general) | Often cited up to 4 standard drinks on a day drinking, ≤14 per week | 14 × 12 fl oz @ 5% ≈ 14 US drinks in this tool |
| US (NIAAA — women, general) | Often cited up to 3 per day, ≤7 per week | 7 beers in this model ≈ 7 US standard drinks |
| UK (NHS — adults) | Often cited ≤14 units per week, spread over 3+ days | 14 UK units ≈ 140 ml ethanol — not equal to “14 US drinks” |
| Australia (general) | Often cited ≤10 standard drinks per week, ≤4 on any day | 10 AU drinks = 100 g ethanol in this model |
Total 1136 mL · 40.33 g ethanol · US 2.88 drinks · UK 5.11 units · AU 4.03 drinks.
Track the full session — two pints is not “two UK units.”
196 g ethanol · US 14 standard drinks · UK 24.84 units · AU 19.6 drinks. Compare US 14/week teaching limit to UK 14 units/week — different ethanol totals.
Share with anyone comparing drink labels across countries
Suggested hashtags: #Alcohol #StandardDrink #UKUnits #ABV #Calculator