Gallon (UK) to Fluid Dram (US) Converter

Volume Converter

40 units available

Decimals:

From

To

1,229.772724

1 gal (UK) = 1,229.772724 fl dr

Formula:

fl dr = gal (UK) × 1,229.7727237211

With your value: 1 gal (UK) = 1,229.77272372 fl dr

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (uk) so you can sanity-check the result.

Milk carton (1/4.5e+3 your value)0.000220 gal (UK)

Kitchen bucket (1/4.5e+2 your value)0.00220 gal (UK)

Car fuel tank (1/91 your value)0.0110 gal (UK)

Bathtub (1/23 your value)0.0440 gal (UK)

Hot tub (1/3.0 your value)0.330 gal (UK)

Your value1.00 gal (UK)

Other Gallon (UK) to Fluid Dram (US) conversions

2 gal (UK) to fl dr 3 gal (UK) to fl dr 4 gal (UK) to fl dr 5 gal (UK) to fl dr 6 gal (UK) to fl dr 7 gal (UK) to fl dr 8 gal (UK) to fl dr

Gallon (UK) to Fluid Dram (US) Conversion Table

Gallon (UK) (gal (UK))	Fluid Dram (US) (fl dr)
0.5	614.886362
1	1,229.772724
2	2,459.545447
5	6,148.863619
10	12,297.727237
15	18,446.590856
20	24,595.454474
25	30,744.318093
50	61,488.636186
100	122,977.272372
250	307,443.18093
500	614,886.361861
1000	1,229,772.723721

Fluid Dram (US) to Gallon (UK) Conversion Table

Fluid Dram (US) (fl dr)	Gallon (UK) (gal (UK))
0.5	0.000407
1	0.000813
2	0.001626
5	0.004066
10	0.008132
15	0.012197
20	0.016263
25	0.020329
50	0.040658
100	0.081316
250	0.20329
500	0.406579
1000	0.813158

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (UK) (gal (UK))

Volume

Exact conversion

The imperial gallon is exactly 4.546 09 L (Weights and Measures Act 1985).

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Fluid Dram (US) (fl dr)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Gallon (UK) to Fluid Dram (US)

To convert from Gallon (UK) (gal (UK)) to Fluid Dram (US) (fl dr), multiply the value by 1,229.7727237211.

Formula: fl dr = gal (UK) × 1,229.7727237211

Reverse: gal (UK) = fl dr × 0.0008131584

Step-by-Step Example

Start with your value in Gallon (UK). For example: 5 gal (UK)
Multiply by the conversion factor: 5 x 1,229.7727237211
The result is: 6,148.863619 fl dr

About Gallon (UK)

The imperial gallon equals exactly 4.54609 litres, about 20% larger than the US gallon — a frequent source of fuel-economy confusion.

Common uses: UK fuel figures, brewing, older recipes.

About Fluid Dram (US)

The fluid dram (us) (fl dr) is a unit of volume and capacity. One fluid dram (us) equals 0.003696691195 litres. UnitConvertLab converts it against every other volume unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: volume calculations, engineering and science, education.

Frequently Asked Questions

How many Fluid Dram (US) are in 1 Gallon (UK)?

There are exactly 1,229.7727237211 Fluid Dram (US) in 1 Gallon (UK). This means the conversion factor from Gallon (UK) to Fluid Dram (US) is 1,229.7727237211.

What is the formula to convert Gallon (UK) to Fluid Dram (US)?

The formula to convert Gallon (UK) to Fluid Dram (US) is: fl dr = gal (UK) × 1,229.7727237211. For example, to convert 10 Gallon (UK) to Fluid Dram (US), you would multiply 10 by 1,229.7727237211.

What is a Gallon (UK)?