Imperial gallon to Milliliter Converter
Type a value — the answer appears instantly. 1 gal (UK) = 4,546.09 ml.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
4,546.09 milliliters
= 4.54609 L= 1.20095 gal
equals 4,546.09 millilitersFormula: ml = gal (UK) × 4546.09
Imperial gallon to Milliliter formula
ml = gal (UK) × 4546.09
Convert 5 imperial gallons to milliliters
- Start with 5 imperial gallons.
- Multiply by the conversion factor: 5 × 4,546.09 = 22,730.5.
- So 5 gal (UK) = 22,730.5 ml.
Imperial gallon to Milliliter conversion table
| Imperial gallons (gal (UK)) | Milliliters (ml) |
|---|---|
| 0.01 gal (UK) | 45.4609 ml |
| 0.1 gal (UK) | 454.609 ml |
| 0.25 gal (UK) | 1,136.52 ml |
| 0.5 gal (UK) | 2,273.05 ml |
| 1 gal (UK) | 4,546.09 ml |
| 2 gal (UK) | 9,092.18 ml |
| 3 gal (UK) | 13,638.3 ml |
| 4 gal (UK) | 18,184.4 ml |
| 5 gal (UK) | 22,730.5 ml |
| 6 gal (UK) | 27,276.5 ml |
| 7 gal (UK) | 31,822.6 ml |
| 8 gal (UK) | 36,368.7 ml |
| 9 gal (UK) | 40,914.8 ml |
| 10 gal (UK) | 45,460.9 ml |
| 15 gal (UK) | 68,191.4 ml |
| 20 gal (UK) | 90,921.8 ml |
| 25 gal (UK) | 113,652 ml |
| 30 gal (UK) | 136,383 ml |
| 40 gal (UK) | 181,844 ml |
| 50 gal (UK) | 227,305 ml |
| 75 gal (UK) | 340,957 ml |
| 100 gal (UK) | 454,609 ml |
| 250 gal (UK) | 1,136,520 ml |
| 500 gal (UK) | 2,273,050 ml |
| 1,000 gal (UK) | 4,546,090 ml |
| 5,000 gal (UK) | 22,730,500 ml |
| 10,000 gal (UK) | 45,460,900 ml |
Unit definitions
What is a imperial gallon?
The imperial (UK) gallon is defined as exactly 4.54609 litres. It is used for fuel economy and liquid volumes in the United Kingdom and some Commonwealth countries. It is larger than the US gallon.
What is a milliliter?
The millilitre is one thousandth of a litre and is equal to one cubic centimetre. It is the everyday metric unit for liquids, cooking, and medicine dosing in most countries. A teaspoon holds about five millilitres.
Frequently asked questions
How many milliliters are in one imperial gallon?
One imperial gallon equals 4,546.09 milliliters (1 gal (UK) = 4,546.09 ml).
How do I convert imperial gallons to milliliters?
Multiply the value in imperial gallons by 4,546.09. For example, 10 gal (UK) × 4,546.09 = 45,460.9 ml.
Which is bigger — a imperial gallon or a milliliter?
A imperial gallon is bigger: one imperial gallon contains 4,546.09 milliliters.
Is this imperial gallon to milliliter converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.