Imperial Gallons to Liters Converter - Convert UK gal to L Instantly
Convert Imperial gallons (UK gal) to liters (L) quickly and accurately with this easy-to-use volume converter. Ideal for brewing, aquariums, fuel planning in UK contexts, beverage packaging, logistics, and engineering tasks that require precise liquid measurements.
Note: This tool converts Imperial (UK) gallons to liters. For US gallons, use the dedicated gallons (US) to liters converter.
About Imperial Gallons to Liters Conversion
Imperial gallons (UK gal) and liters (L) are both used for liquid volume, but they originate from different measurement systems. The Imperial gallon remains a reference in UK brewing, maritime documentation, and historical materials. The liter, part of the SI (metric) system, is the global standard for labeling beverages, laboratory work, and many industrial processes. Converting UK gallons to liters ensures that data can be shared consistently across regions and standards.
The relationship is fixed: 1 Imperial gallon = 4.54609 liters. Because this factor is exact, the conversion is a simple multiplication, making it reliable for technical documentation, production batches, logistics, and audits.
Imperial Gallons to Liters Formula
Use the factor method:
liters = Imperial gallons (UK) × 4.54609Example:
10 UK gal = 10 × 4.54609 = 45.46090 L
To convert in the opposite direction:
UK gal = liters ÷ 4.54609.
Imperial vs US Gallons
The Imperial gallon (exactly 4.54609 L) is about 20% larger than the US gallon (3.785411784 L). Always check which gallon your source uses—confusing them can introduce significant error in recipes, dosing, storage calculations, and compliance reports.
Why Convert UK gal to L?
- 🍺 Brewing & distilling: Convert batch sizes and vessel capacities for UK specs.
- 🐠 Aquaculture & aquariums: Dose treatments and size filtration accurately.
- ⛽ Fuel & transport: Translate UK gallon figures to liters for international comparisons.
- 🥤 Beverage & food: Align packaging and labels with metric requirements.
- 📦 Logistics & compliance: Prepare documentation that mixes historical UK units and metric data.
Common Conversions
- 1 UK gal = 4.54609 L
- 2 UK gal = 9.09218 L
- 5 UK gal = 22.73045 L
- 10 UK gal = 45.46090 L
- 20 UK gal = 90.92180 L
- 50 UK gal = 227.30450 L
- 100 UK gal = 454.60900 L
What is an Imperial (UK) Gallon?
The Imperial gallon is a traditional UK unit for liquid volume, defined as exactly 4.54609 liters (or 160 Imperial fluid ounces). It appears in brewing, maritime contexts, and historical specifications. Although modern UK retail commonly uses liters, Imperial gallons remain a referenced measure in many technical and enthusiast communities.
What is a Liter?
The liter is the metric unit of volume used worldwide. It integrates with SI units such as the milliliter (mL) and cubic meter (m³), making it convenient for scaling from bench experiments to industrial production and for standardized labeling on consumer goods.
Step-by-Step: Converting UK gal to L
- Write down your volume in Imperial gallons.
- Multiply by 4.54609.
- Express the result in L (liters).
Example walkthrough:
Input: 7.5 UK gal
Multiply: 7.5 × 4.54609 = 34.09568
Output: 34.09568 LPrecision, Rounding & Significant Figures
Five decimal places are ample for most practical needs. For technical documents, match the precision to your instruments and reporting standards. Maintain consistent significant figures across chained calculations to minimize rounding error.
Use Cases of UK gal → L
- 🍻 Scaling brew recipes and tank capacities specified in UK gallons
- 🐟 Calculating water treatment volumes in aquaculture operations
- 🚚 Converting historical or regional specs to metric for procurement
- 🥫 Adapting packaging and labels for metric-only markets
- 🧪 Preparing lab solutions where legacy documentation cites UK gal
Quick Reference Table
| Imperial Gallons (UK gal) | Liters (L) |
|---|---|
| 1 | 4.54609 |
| 2 | 9.09218 |
| 5 | 22.73045 |
| 10 | 45.46090 |
| 20 | 90.92180 |
| 50 | 227.30450 |
Frequently Asked Questions
How do you convert Imperial gallons to liters?
Use the formula: liters = Imperial gallons × 4.54609. One Imperial (UK) gallon equals exactly 4.54609 liters, so multiply UK gallons by this value to get liters.
How many liters are in 1 Imperial gallon?
1 Imperial gallon is exactly 4.54609 liters. For quick estimates, you can use 4.5461.
Is an Imperial gallon the same as a US gallon?
No. An Imperial (UK) gallon is larger at 4.54609 liters, while a US gallon is 3.785411784 liters. This page converts UK gallons to liters.
How do I convert liters back to Imperial gallons?
Divide by the same factor: UK gal = liters ÷ 4.54609. For example, 10 L ÷ 4.54609 ≈ 2.19969 UK gal.
How many milliliters are in an Imperial gallon?
Since 1 liter = 1000 milliliters, an Imperial gallon (4.54609 L) is 4546.09 milliliters.
Tips for Working with Liters
- Record the exact factor (4.54609) in technical notes to ensure reproducible results.
- For small kitchen or lab quantities, convert to milliliters for simpler measuring.
- Verify whether your inputs use US or Imperial gallons before converting.