Imperial Fluid Ounces to Cubic Meters (fl oz (UK) to m³)

1 imperial fluid ounce equals 0.0000284130625 cubic meters exactly.

1 imperial fluid ounce = 0.0000284130625 cubic meters

How to convert imperial fluid ounces to cubic meters

To convert imperial fluid ounces to cubic meters, multiply the number of imperial fluid ounces by 0.0000284130625. This factor is exact. To go the other way, multiply cubic meters by 35,195.07973 (rounded).

cubic meters = imperial fluid ounces × 0.0000284130625

Example: 10 imperial fluid ounces = 0.000284130625 cubic meters.

Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.

About these units

Imperial Fluid Ounce (fl oz (UK))

Imperial (British)Current unit

Exactly 28.4130625 mL. About 4% smaller than the US fluid ounce.

Imperial fluid ounce comes from the 1824 reform that defined the British gallon as the volume of ten pounds of water. Because a gallon was set at 160 fluid ounces, an ounce of water weighs about one ounce of mass, around 28.35 grams. That neat link between volume and weight was the point of the imperial scheme, and it explains why people long thought of fluid ounces and weight ounces as nearly the same.

Today an imperial fluid ounce is exactly 28.4130625 milliliters, one twentieth of an imperial pint. That is about 4 percent smaller than the US fluid ounce at 29.57 mL, so a US recipe using fluid ounces does not map one-for-one onto a British one. UK trade rules restricted its use in 1995, and it lives on mostly on older labels, in bars and in recipes. Twenty of them fill an imperial pint, which makes the pint the easiest way to picture one.

1 imperial fluid ounce = 0.0284130625 liters (exactly).

Sources: Wikipedia: Fluid ounce; UK Weights and Measures Act 1985, Schedule 1

Cubic Meter (m³)

Metric (SI)Current unit

The SI derived unit of volume: 1,000 liters. Used for water supply, gas, concrete and shipping space.

When the metric system was set up, the cube whose edge is one meter became its natural large unit of volume. A cubic meter also went by other names: kiloliter, now rarely used, and stere, still applied to stacked firewood. In modern SI it is the coherent derived unit of volume, and the liter is a convenience unit defined from it as one thousandth of a cubic meter.

A cubic meter is large by everyday standards. It holds 1,000 liters, and pure water at its densest weighs almost exactly one tonne in that space, which is how the metric tonne and the cubic meter ended up so conveniently paired. It is the unit of choice for water supply, gas, timber, concrete and shipping space, where freight is often quoted in CBM. For a picture, about 6.29 oil barrels or 264 US gallons fit in one, and an Olympic swimming pool, at least 2 meters deep, holds roughly 2,500 of them.

1 cubic meter = 1,000 liters (exactly).

Sources: Wikipedia: Cubic metre; Wikipedia: Olympic-size swimming pool; NIST Guide to the SI, Chapter 5: units outside the SI

Related conversions

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