One US liquid pint of water weighs approximately 0.473 kg. One UK (Imperial) pint of water weighs approximately 0.568 kg. The difference comes down to the fact that these are two differently sized pints, and the actual weight in kilograms also changes depending on what liquid you’re measuring.
US Pint vs. Imperial Pint
A US liquid pint holds 473.18 mL (16 fluid ounces), while an Imperial pint holds 568.26 mL (20 fluid ounces). The Imperial pint is about 20% larger. If you’re in the United States, a pint almost always means the smaller US version. In the UK, Canada, Ireland, and Australia, “pint” typically refers to the Imperial measure.
For pure water at room temperature, the conversions work out to:
- 1 US liquid pint = 0.473 kg
- 1 Imperial pint = 0.568 kg
Water has a density very close to 1 kg per liter, which makes the math straightforward: the volume in liters roughly equals the weight in kilograms. Temperature changes this only slightly. Water at 4°C (its densest point) weighs 1.000 kg per liter, while water at 25°C weighs 0.997 kg per liter. For a single pint, that difference amounts to less than 2 grams, so it’s negligible for cooking or everyday purposes.
The US Dry Pint
There’s also a US dry pint, used for measuring things like berries or grains. It holds 550.6 mL, which is larger than the US liquid pint but slightly smaller than an Imperial pint. You can’t convert a dry pint directly to kilograms without knowing the density of whatever you’re measuring, since a pint of blueberries weighs far less than a pint of packed flour. The dry pint is a measure of volume, not weight.
How the Liquid Changes the Weight
Because a pint is a volume measurement, the weight in kilograms depends entirely on the density of the substance. Water is the baseline, but heavier or lighter liquids shift the number considerably.
Honey is a good example of a dense liquid. One US pint of honey weighs roughly 0.91 kg, nearly double the weight of a pint of water. That’s because honey is thick and heavy, packing more mass into the same space. Cooking oil goes in the other direction. With a density of about 0.92 kg per liter, a US pint of vegetable or canola oil weighs around 0.435 kg, about 8% less than water.
Milk falls close to water but slightly heavier (around 0.49 kg per US pint), while alcohol-based liquids like beer or wine vary depending on their alcohol and sugar content but generally stay in the 0.45 to 0.48 kg range for a US pint.
Quick Reference Table
- 1 US pint of water = 0.473 kg (1.04 lb)
- 1 Imperial pint of water = 0.568 kg (1.25 lb)
- 1 US pint of honey = ~0.91 kg (2.0 lb)
- 1 US pint of cooking oil = ~0.44 kg (0.96 lb)
If you need a rough mental shortcut for water: a US pint is just under half a kilogram, and an Imperial pint is just over half a kilogram.