CALTRX

Fluid Ounces to Milliliters

Convert US fluid ounces to milliliters for bartending, medication, and beverages. 1 fl oz = 29.5735 mL — enter any fl oz value for instant metric conversion.

Enter your values above to see the results.

Tips & Notes

  • ✓Bartending measures: a standard US shot = 1.5 fl oz = 44.36 mL. A jigger (1 oz) = 29.57 mL. A pony (0.5 oz) = 14.79 mL. Standard pour for cocktail: 1.5-2 fl oz = 44-59 mL. A 750 mL wine bottle = 25.36 fl oz ≈ 25 fl oz = approximately 17 standard 1.5-oz pours.
  • ✓Medication dosing: US prescription liquids are often dosed in teaspoons (5 mL = 0.169 fl oz) or tablespoons (15 mL = 0.507 fl oz). A 4-fl-oz medicine bottle = 118.3 mL. Pediatric dosing is always in mL internationally — verify if a US prescription specifies fl oz vs. mL.
  • ✓Beverage container sizes in fl oz: 8 fl oz = 236.6 mL; 12 fl oz = 354.9 mL (standard US can); 16 fl oz = 473.2 mL (large US can); 20 fl oz = 591.5 mL; 24 fl oz = 709.8 mL; 64 fl oz = 1,892.7 mL (half gallon jug).
  • ✓UK vs. US fluid ounce: US fl oz = 29.5735 mL; UK fl oz = 28.4131 mL — UK is 3.96% smaller. A UK recipe calling for 10 fl oz = 284.1 mL (UK) vs. 295.7 mL (if US fl oz were used). Check recipe origin when fl oz is specified.
  • ✓Wine and spirits bottles: 750 mL = 25.36 US fl oz; 1 L = 33.81 fl oz; 1.75 L (handle) = 59.17 fl oz. US spirits bottle sizes: pint (375 mL = 12.68 fl oz), fifth (750 mL = 25.36 fl oz), quart (946 mL = 32 fl oz), half-gallon (1,750 mL = 59.17 fl oz).

Common Mistakes

  • ✗Confusing fluid ounces (volume) with ounces (weight) — 1 fl oz measures volume (29.57 mL); 1 oz measures weight (28.35 g). They are completely different quantities. A recipe calling for "8 oz of cream cheese" means 8 weight ounces = 227 g, not 8 fl oz = 236.6 mL (though for water these are nearly the same due to 1 g/mL density).
  • ✗Using UK fl oz values for US recipes — UK fl oz = 28.41 mL; US fl oz = 29.57 mL. A UK cocktail recipe calling for 1 fl oz uses 28.41 mL; a US recipe calls for 29.57 mL. Difference: 1.16 mL per ounce — small but adds up across multiple ingredients in precise cocktail recipes.
  • ✗Forgetting that standard shot sizes differ internationally — US standard shot = 1.5 fl oz = 44.36 mL. UK standard single measure = 25 mL = 0.845 fl oz; UK double = 50 mL = 1.69 fl oz. Australian standard = 30 mL = 1.014 fl oz. International cocktail recipes must specify which country's shot standard is used.
  • ✗Applying fl-oz conversion to fl oz per serving on nutrition labels — a US nutrition label "serving size 8 fl oz" is 8 × 29.5735 = 236.6 mL of the product. This is the reference for calories per serving. Drinking 16 fl oz = 2 servings = double the calories/nutrients listed per serving.
  • ✗Treating mL as equivalent to fl oz for quick approximation — 30 mL is commonly used as "1 fl oz" in bartending shorthand (actual: 29.57 mL). For precise recipes, the 0.43 mL difference per ounce accumulates: a 10-ingredient cocktail with 1 oz of each ingredient rounded to 30 mL = 4.3 mL over target.

Fluid Ounces to Milliliters Overview

The fluid ounce is the standard US measurement for beverages, cocktails, and pharmaceutical liquids. Converting to milliliters is essential for bartenders using metric jiggers, pharmacists dispensing internationally standardized medications, and manufacturers labeling products for both US and global markets.

Fluid ounces to milliliters formula:

mL = US fl oz × 29.5735 | Quick: mL ≈ fl oz × 30 (1.4% high)
EX: Cocktail recipe 1.5 fl oz tequila → 1.5 × 29.5735 = 44.36 mL. 12 fl oz can → 12 × 29.5735 = 354.88 mL. Medication 4 fl oz bottle → 4 × 29.5735 = 118.3 mL
Inverse — mL to US fl oz:
fl oz = mL / 29.5735 | fl oz = mL × 0.033814
EX: 750 mL wine bottle → 750/29.5735 = 25.36 fl oz. Standard 250 mL drink → 250/29.5735 = 8.45 fl oz
US beverage sizes in fl oz and mL:
US Size NameFluid OuncesMillilitersCommon Product
Shot1.5 fl oz44.4 mLSpirits serving
Standard can12 fl oz354.9 mLBeer, soda
Tall can16 fl oz473.2 mLCraft beer, energy drink
US pint (glass)16 fl oz473.2 mLBar pint glass
Wine serving5 fl oz147.9 mLStandard pour
750 mL bottle25.36 fl oz750 mLWine/spirits standard
Bartending measures — US fl oz and mL:
MeasureUS fl ozmLUse
Dash0.021 fl oz0.62 mLBitters, flavoring
Teaspoon0.167 fl oz4.93 mLSmall amounts
Pony1.0 fl oz29.57 mLBase spirit smaller pour
Jigger (standard)1.5 fl oz44.36 mLStandard US shot/cocktail
Double jigger3.0 fl oz88.72 mLDouble shot
The fluid ounce is the vestige of a measurement system where a volume unit was defined by the weight of a specific commodity (water) at standard conditions — 1 fl oz of water was designed to weigh approximately 1 avoirdupois ounce. This design led to the US fl oz weighing approximately 29.57 g (close to but not exactly 1 oz = 28.35 g due to historical calibration differences). The milliliter, by contrast, is exactly 1/1000 of a liter, defined from first principles — making it simpler, more consistent, and universally compatible with the SI system that governs all modern science and international commerce.

Frequently Asked Questions

Multiply US fl oz by 29.5735. Examples: 1 fl oz = 29.57 mL; 1.5 fl oz (shot) = 44.36 mL; 2 fl oz = 59.15 mL; 4 fl oz = 118.29 mL; 8 fl oz (1 cup) = 236.59 mL; 12 fl oz (standard can) = 354.88 mL; 16 fl oz (pint) = 473.18 mL; 32 fl oz (quart) = 946.35 mL; 128 fl oz (gallon) = 3,785.41 mL. Quick estimate: multiply by 30 (1.4% high).

US bartending measures: 1 dash = 0.62 mL = 0.021 fl oz; 1 teaspoon = 4.93 mL = 0.167 fl oz; 1 tablespoon = 14.79 mL = 0.5 fl oz; 1 pony = 1 fl oz = 29.57 mL; 1 jigger (standard) = 1.5 fl oz = 44.36 mL; 1 shot = 1.5 fl oz = 44.36 mL; 1 double shot = 3 fl oz = 88.72 mL. Classic cocktail examples: Margarita — 2 fl oz tequila = 59.15 mL; 1 fl oz lime juice = 29.57 mL; 0.75 fl oz triple sec = 22.18 mL. Old Fashioned — 2 fl oz bourbon = 59.15 mL; 1 sugar cube (4.5g, dissolved in 1 tsp water). International variations: UK single measure = 25 mL = 0.85 fl oz.

US beverage sizes: single-serve can 12 fl oz = 354.9 mL (common: Coke, beer); tall can 16 fl oz = 473.2 mL; US pint glass 16 fl oz = 473.2 mL; 20 fl oz bottle = 591.5 mL; 1 US pint (fluid) = 16 fl oz = 473.2 mL; 2-liter bottle = 67.6 fl oz; 1 US quart = 32 fl oz = 946.4 mL; 1 US gallon = 128 fl oz = 3,785.4 mL. Wine glass standard pour 5 fl oz = 147.9 mL. Beer pint in UK = 20 fl oz (UK) = 568 mL vs US beer pint = 16 fl oz (US) = 473 mL — same name, 20% more beer in the UK.

US liquid medications are commonly prescribed in teaspoons, tablespoons, or fluid ounces but are always measured in mL for accuracy. Standard conversions: 1 teaspoon (tsp) = 5 mL = 0.169 fl oz; 1 tablespoon (tbsp) = 15 mL = 0.507 fl oz; 2 tablespoons = 30 mL = 1.014 fl oz; 4 fl oz = 118.3 mL; 8 fl oz = 236.6 mL. Prescription bottles: 4 fl oz (118 mL) and 8 fl oz (237 mL) are common pharmacy sizes. The FDA requires metric (mL) dosing on liquid medication labels since 2020 for pediatric medications to prevent dosing errors from tsp/tbsp ambiguity.

US fluid ounce = 1/128 US gallon = 29.5735 mL. UK fluid ounce = 1/160 UK gallon = 28.4131 mL. UK fl oz is 3.97% smaller than US fl oz. Practical difference: UK recipe calling for 10 fl oz = 284.1 mL; same amount in US fl oz = 295.7 mL — 11.6 mL difference. UK pint = 20 UK fl oz = 568.3 mL; US pint = 16 US fl oz = 473.2 mL. UK gill = 5 UK fl oz = 142.1 mL; US gill = 4 US fl oz = 118.3 mL. For cocktail recipes from UK sources (often from British bartending texts), use 28.41 mL per fl oz.

Wine bottle sizes: miniature 50 mL = 1.69 fl oz; demi 375 mL = 12.68 fl oz; standard 750 mL = 25.36 fl oz; magnum 1.5 L = 50.72 fl oz; double magnum 3 L = 101.44 fl oz; Jeroboam 3 L (champagne) = 101.44 fl oz. Spirits bottle sizes (US): nip/miniature 50 mL = 1.69 fl oz; half pint 200 mL = 6.76 fl oz; pint 375 mL = 12.68 fl oz; fifth 750 mL = 25.36 fl oz; quart 1 L = 33.81 fl oz; half gallon 1.75 L = 59.17 fl oz. Standard spirits serving: 1.5 fl oz = 44.36 mL. Drinks per 750 mL bottle: 750/44.36 = 16.9 standard shots.