An imperial gallon is exactly 4.54609 liters.
Imperial gallons to Metric tablespoons Converter — imp gal to metric tbsp
Convert Imperial gallon (imp gal) to Metric tablespoon (metric tbsp) using the exact conversion factor (1 imperial gallon = 303.0726667 metric tablespoon). See the formula, worked examples, conversion table, history, and common uses.
Imperial gallons to Metric tablespoons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A metric tablespoon is 15 milliliters.
Result = input x 0.00454609 / 1.5e-5.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial gallons to Metric tablespoons
Imperial gallon and Metric tablespoon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Imperial gallon is most often used for uk fuel and beverage measurement (historically; uk now primarily uses liters for retail).
Formula
metric tablespoons = imperial gallons × 303.072666667
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon equals 0.00454609 base units, and 1 metric tablespoon equals 0.000015 base units, so dividing one by the other gives the direct imperial gallon-to-metric tablespoon factor of 303.072666667.
Simple example
1 imp gal × 303.0726667 = 303.0726667 metric tbsp
1 imperial gallon = 303.0726667 metric tablespoons.
Real-world example
10 imp gal × 303.0726667 = 3,030.726667 metric tbsp
10 imperial gallons = 3,030.726667 metric tablespoons.
Conversion table
| Imperial gallon (imp gal) | Metric tablespoon (metric tbsp) |
|---|---|
| 1 imp gal | 303.0726667 metric tbsp |
| 5 imp gal | 1,515.363333 metric tbsp |
| 10 imp gal | 3,030.726667 metric tbsp |
| 25 imp gal | 7,576.816667 metric tbsp |
| 50 imp gal | 15,153.63333 metric tbsp |
| 100 imp gal | 30,307.26667 metric tbsp |
Reverse conversion: Metric tablespoon to Imperial gallon
303.0726667 metric tbsp × 0.003299538724 = 1 imp gal
303.0726667 metric tablespoons = 1 imperial gallons.
imperial gallons = metric tablespoons × 0.00329953872449
For a page dedicated to this direction, see Metric tablespoon to Imperial gallon.
Understanding the Imperial gallon
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom, Canada (some contexts), and other Commonwealth countries
Imperial gallon vs. US gallon. Britain's 1824 Weights and Measures Act defined a new gallon based on 10 pounds of water, replacing the old wine gallon the US had already adopted — leaving the US (3.785 L) and imperial (4.546 L) gallons about 20% apart today.
Uses of the Imperial gallon today
- UK fuel and beverage measurement (historically; UK now primarily uses liters for retail)
- Commonwealth country liquid measurement in some contexts
History of the Imperial gallon
The imperial gallon was created by Britain's Weights and Measures Act of 1824, defined as the volume of 10 pounds of water, replacing several inconsistent older English gallon definitions (wine gallon, ale gallon, corn gallon) with one standard.
Historical origin. Imperial gallon was not the invention of a single named person; it developed through the process described above.
Understanding the Metric tablespoon (metric tbsp)
A metric tablespoon is 15 milliliters.
Imperial gallon — sources
- UK Weights and Measures Act 1824 — Establishes the imperial gallon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many metric tablespoons are in 1 imperial gallon?
1 imperial gallon equals 303.0726667 metric tablespoons, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon to metric tablespoon?
Multiply the imperial gallon value by 303.0726667. The converter above does this instantly to whatever precision you set.
How do I convert metric tablespoon back to imperial gallon?
Use the reverse factor: 1 metric tablespoon equals 0.0032995387 imperial gallons. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon?
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
What is a metric tablespoon?
Metric tablespoon (metric tbsp) is a unit of volume.
Is the imperial gallon to metric tablespoon conversion exact?
Yes. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between imperial gallon vs. us gallon?
Britain's 1824 Weights and Measures Act defined a new gallon based on 10 pounds of water, replacing the old wine gallon the US had already adopted — leaving the US (3.785 L) and imperial (4.546 L) gallons about 20% apart today.
Where is the imperial gallon still used today?
United Kingdom, Canada (some contexts), and other Commonwealth countries