Water bottle sizes, without the guesswork.

Compare capacity at a glance

Bars compare volume, not the physical height or width of a bottle.

Water bottle capacity chart

Which size fits your day?

• Frequent refill access: a smaller capacity reduces how much water you carry at once. Start with your actual refill opportunities.
• Longer gaps between refills: a larger bottle carries more, but also adds weight. Check the empty bottle weight and whether you want a handle.
• Bag pockets and cup holders: capacity does not determine fit. Check the manufacturer’s diameter and height, including the lid.
• Cleaning: check whether you can reach the inside and remove seals. Follow the manufacturer’s cleaning instructions.

Capacity is not the same as bottle dimensions

Two 750 ml bottles can have different heights and diameters. Insulation, wall thickness, shape and lid design all affect the outside dimensions. This chart compares liquid capacity; use the product specification to check physical fit.

Are 16.9 oz and 500 ml the same?

They are nearly equivalent. 16.9 US fl oz converts to about 499.8 ml. Labels are often rounded; use the unit and capacity actually printed on your bottle. US fluid ounces measure volume, not weight, and differ from Imperial fluid ounces.

Work out refills for a chosen amount

Divide your chosen volume by bottle capacity. Two liters fills four 500 ml bottles or two 1-liter bottles. Starting with an empty bottle, four full bottles of water means one initial fill and three refills.

• Convert 2 liters to your bottle size
• Convert US or Imperial gallons to bottles
• Use the daily reference and bottle converter

Choosing a bottle capacity does not establish how much you personally need to drink. See our method and sources for the separate intake question.

Volume conversions: NIST Guide to the SI.