Imperial Gallons to Liters
1 imperial gallon = 4.54609 liters (L)
Convert imperial gallons to liters instantly. 1 imperial gallon = 4.54609 liters. Free, accurate, with conversion table and formula.
Imperial Gallon (imp gal)
Liter (L)
| Unit | 1 imp gal equals |
|---|---|
| Milliliter (ml) | 4,546.09 |
| Liter (L) | 4.54609 |
| Cubic Meter (m³) | 0.00454609 |
| Cubic Centimeter (cm³) | 4,546.09 |
| US Teaspoon (tsp) | 922.33 |
| US Tablespoon (tbsp) | 307.442 |
| US Fluid Ounce (fl oz) | 153.722 |
| US Cup (cup) | 18.942 |
| US Pint (pt) | 9.60761 |
| US Quart (qt) | 4.8038 |
| US Gallon (gal) | 1.20095 |
| Imperial Gallon (imp gal) | 1 |
How to convert imperial gallons to liters
- 1Take your value in imperial gallons (imp gal).
- 2Multiply by 4.54609.
- 3The result is your value in liters (L).
Imperial Gallons to Liters conversion table
| Imperial Gallons (imp gal) | Liters (L) |
|---|---|
| 1 | 4.54609 |
| 2 | 9.09218 |
| 5 | 22.7305 |
| 10 | 45.4609 |
| 25 | 113.652 |
| 50 | 227.305 |
| 100 | 454.609 |
| 250 | 1,136.52 |
| 500 | 2,273.05 |
| 1,000 | 4,546.09 |
Frequently asked
How many liters are in a imperial gallon?
1 imperial gallon equals 4.54609 liters (L).
How do I convert imperial gallons to liters?
Multiply the number of imperial gallons by 4.54609 to get liters.
What is 10 imperial gallons in liters?
10 imp gal equals 45.46 L.
What is 100 imperial gallons in liters?
100 imp gal equals 454.6 L.
How do I convert liters back to imperial gallons?
Multiply liters by 0.219969 (the reciprocal) or use the swap button above.
Where you'll actually use this
Volume measures three-dimensional capacity — how much liquid a container holds or how much space an object occupies. Metric uses liters and milliliters; imperial uses gallons, quarts, pints, cups, and fluid ounces.
- Cooking
US recipes use cups and tablespoons; metric recipes use ml. A US cup is 236.6 ml — not 250 ml as in metric cups.
- Fuel
Pump prices show gallons in the US, liters almost everywhere else.
- Beverages
A US fluid ounce (29.57 ml) is slightly smaller than a UK fluid ounce (28.41 ml).
Common mistakes to avoid
- US gallon ≠ UK gallon
A US gallon is 3.785 L, a UK (imperial) gallon is 4.546 L — about 20% larger.
- Cups aren't universal
US cup = 236.6 ml. UK cup = 284 ml. Metric cup = 250 ml. Match the recipe origin.
Did you know?
At 4 °C exactly one liter of pure water weighs one kilogram — the original metric definition.
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