imp gal\text{imp gal}

imperial gallon

Volumeexact by definition

The imperial gallon is exactly 4.54609 litres. Since 1985 the United Kingdom has defined it as that exact metric value, replacing the older definition based on the mass of water. It divides into 4 imperial quarts, 8 imperial pints or 160 imperial fluid ounces.

Watch out: The imperial gallon is about 20% larger than the US gallon of 3.785 L. It is still seen in British and Commonwealth fuel-economy figures, older marine and aviation documents, and Canadian legacy equipment.

1 imp gal\text{imp gal} 4.54609 L\text{L}
Where the unit came from

The Weights and Measures Act of 1824 abolished the separate English wine, ale and corn gallons and replaced them with a single gallon defined as the volume occupied by ten pounds of distilled water under specified conditions. That definition made the gallon depend on a weighing, so it was later replaced by the exact litre value in use today.

One imperial gallon in every volume unit

4,546,090cubic millimeter (mm³)
4,546,090microliter (μL)
4,546.09milliliter (mL)
4,546.09cubic centimeter (cm³)
922.33US teaspoon (tsp)
454.609centiliter (cL)
307.443US tablespoon (tbsp)
277.419cubic inch (in³)
160imperial fluid ounce (imp fl oz)
153.722US fluid ounce (fl oz)
45.4609deciliter (dL)
19.2152US cup (cup)
9.6076US pint (pt)
8imperial pint (imp pt)
4.8038US quart (qt)
4.54609liter (L)
4.54609cubic decimeter (dm³)
4imperial quart (imp qt)
1.92652board foot (fbm)
1.20095US gallon (gal)
1imperial gallon (imp gal)this unit
0.160544cubic foot (ft³)
0.129007US bushel (bu)
0.0454609hectoliter (hL)
0.0387403US beer barrel (bbl beer)
0.028594oil barrel (bbl)
0.00594606cubic yard (yd³)
0.00454609cubic meter (m³)
0.00454609kiloliter (kL)
0.00160544hundred cubic feet (CCF)
0.00125425cord (cord)
0.00000368558acre-foot (ac·ft)
0.00000120095million US gallons (MG)
4.54609e-12cubic kilometer (km³)