How Many Oz Is a Water Bottle? Sizes & ml Chart

The short answer: a standard single-use water bottle holds about 16.9 oz (500 ml). Reusable bottles are most commonly 20 to 32 oz, and insulated tumblers come in 12, 20, 30 and 40 oz. The "right" size depends on whether it's for a desk, the gym or all-day carry.

Common drinkware sizes (oz ↔ ml)

Size (oz)	Size (ml)	Typical product
12 oz	355 ml	Coffee cup, kids bottle
16.9 oz	500 ml	Standard disposable water bottle
20 oz	590 ml	Travel mug, small tumbler
24 oz	710 ml	Sport / gym bottle
30 oz	890 ml	Large tumbler
32 oz	950 ml	Large reusable bottle
40 oz	1,180 ml	Handled quencher tumbler

Quick conversion: 1 US fluid ounce ≈ 29.57 ml, so to go from oz to ml multiply by about 30; to go from ml to oz, divide by about 30.

Which size should you choose?

Desk & commute

16.9–20 oz is easy to carry and fits a cup holder and bag pocket.

Gym & sport

24–32 oz means fewer refills during a workout; pick a sport cap.

All-day hydration

32–40 oz covers most of a day; 40 oz handled tumblers are the trend.

Coffee & tea

12–20 oz travel mugs match a typical hot-drink serving.

Sourcing a range? offering 20 oz, 30 oz and 40 oz covers most of the market. We make all of these with custom logo and colour — and can add your own size with a mould.

Custom tumblers (12–40 oz) ›Sport water bottles ›Vacuum thermos & bottles ›

Frequently asked questions

How many oz is a standard water bottle?▾

A standard single-use plastic water bottle holds about 16.9 oz, which is 500 ml. Reusable bottles are usually larger, commonly 20 to 32 oz.

How many oz is a typical reusable or sport bottle?▾

Reusable and sport bottles are most often 20 to 32 oz (about 590–950 ml). Gym users often choose 24–32 oz to cut down on refills.

What are the common tumbler sizes?▾

Insulated tumblers usually come in 12, 20, 30 and 40 oz. The 20 oz and 30 oz are the most popular, and 40 oz handled tumblers have become a strong trend.

How do I convert oz to ml for a bottle?▾

Multiply ounces by about 29.57 to get millilitres (roughly ×30). So 20 oz ≈ 590 ml and 32 oz ≈ 950 ml.

Sourcing drinkware? Talk to Beyond at Jupeng — a real factory since 1998, factory-direct pricing, FDA/LFGB/EU/Prop 65 certs ready, MOQ from 500 pcs, 30-day production. We usually reply within 24 hours.

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Written by the Jupeng Drinkware team — Yongkang, Zhejiang, China. Manufacturing drinkware since 1998. Contact Beyond: info@jupengcup.com | WhatsApp +86 156 5791 8881

How Many Oz Is a Water Bottle?