Cubic meter to Imperial gallon

1 m³

imp gal

219.96924829999987249053 imp gal

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Quick Reference Table (Cubic meter to Imperial gallon)

Cubic meter (m³)Imperial gallon (imp gal)
0.121.99692482999998724905
0.5109.98462414999993624526
1219.96924829999987249053
51,099.84624149999936245263
102,199.69248299999872490526
10021,996.92482999998724905259

About Cubic meter (m³)

The cubic meter (m³) is the SI derived unit of volume, defined as the volume of a cube with sides of exactly one meter. It is the standard unit for large-volume measurement in science, engineering, construction, and trade. One cubic meter equals 1,000 liters. Natural gas is sold by the cubic meter, concrete is ordered in m³, swimming pools and shipping containers are described in cubic meters, and HVAC airflow is measured in m³/hour.

A standard bathtub holds about 0.15–0.2 m³. A 20-foot shipping container has an internal volume of roughly 33 m³.

About Imperial gallon (imp gal)

The imperial gallon is a unit of volume defined as exactly 4.54609 liters, used in the United Kingdom, Canada, and some Commonwealth nations. It is approximately 20% larger than the US liquid gallon. Fuel economy in the UK is expressed in miles per imperial gallon. The imperial gallon divides into 8 imperial pints, each of 568 mL. The UK officially metricated fuel sales to liters in the 1980s–1990s, but miles per imperial gallon remains the legal unit for new car fuel economy labels.

UK car fuel economy figures are expressed in miles per imperial gallon. One imperial gallon equals 8 standard UK pints of beer.


Cubic meter – Frequently Asked Questions

There are exactly 1,000 liters in one cubic meter. This follows from 1 m³ = 1,000 dm³ and 1 dm³ = 1 liter.

Natural gas is billed by volume at standard conditions. The cubic meter is the standard billing unit in most metric countries. In the US, natural gas is sold in cubic feet instead.

Imagine a cube one meter on each side — about the size of a large washing machine. It holds 1,000 liters of water, which weighs exactly 1,000 kg (one metric tonne) at standard conditions.

Concrete is ordered and priced by the cubic meter. A typical residential house slab might use 10–20 m³ of concrete. Excavated soil, fill material, and gravel are also sold per cubic meter.

Cubic meters per hour (m³/h) measures volumetric airflow rate — common in HVAC, ventilation, and industrial fan specifications. A domestic kitchen extractor fan typically moves 200–600 m³/h. The imperial equivalent is cubic feet per minute (CFM).

Imperial gallon – Frequently Asked Questions

One imperial gallon is defined as exactly 4.54609 liters — approximately 20% more than the US liquid gallon (3.785 L).

The UK switched fuel sales to liters in the 1990s. However, miles per gallon (imperial) remains the legal unit for car fuel economy on new vehicle labels. Road speed is in mph and distances are in miles, so imperial gallons remain embedded in UK motoring.

UK MPG uses the imperial gallon (4.546 L); US MPG uses the US gallon (3.785 L). Multiply UK MPG by 0.832 to get US MPG. A car rated 40 UK MPG ≈ 33 US MPG.

There are exactly 8 imperial pints in one imperial gallon. Each imperial pint is 568 mL, compared to 473 mL for a US pint.

Canada officially metricated in the 1970s and fuel is sold in liters. However, some older Canadians and certain agricultural contexts still reference imperial gallons informally. Canadian and UK imperial gallons are identical (4.54609 L).

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