Gallon (UK) to Fluid Dram (UK) Converter

Volume Converter

40 units available

Decimals:

From

To

1,280.000552

1 gal (UK) = 1,280.000552 fl dr (UK)

Formula:

fl dr (UK) = gal (UK) × 1,280.0005523096

With your value: 1 gal (UK) = 1,280.00055231 fl dr (UK)

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 (UK) conversions

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

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

Gallon (UK) (gal (UK))	Fluid Dram (UK) (fl dr (UK))
0.5	640.000276
1	1,280.000552
2	2,560.001105
5	6,400.002762
10	12,800.005523
15	19,200.008285
20	25,600.011046
25	32,000.013808
50	64,000.027615
100	128,000.055231
250	320,000.138077
500	640,000.276155
1000	1,280,000.55231

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

Fluid Dram (UK) (fl dr (UK))	Gallon (UK) (gal (UK))
0.5	0.000391
1	0.000781
2	0.001562
5	0.003906
10	0.007812
15	0.011719
20	0.015625
25	0.019531
50	0.039062
100	0.078125
250	0.195312
500	0.390625
1000	0.78125

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 (UK) (fl dr (UK))

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 (UK)

To convert from Gallon (UK) (gal (UK)) to Fluid Dram (UK) (fl dr (UK)), multiply the value by 1,280.0005523096.

Formula: fl dr (UK) = gal (UK) × 1,280.0005523096

Reverse: gal (UK) = fl dr (UK) × 0.0007812497

Step-by-Step Example

Start with your value in Gallon (UK). For example: 5 gal (UK)
Multiply by the conversion factor: 5 x 1,280.0005523096
The result is: 6,400.002762 fl dr (UK)

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 (UK)

The fluid dram (uk) (fl dr (UK)) is a unit of volume and capacity. One fluid dram (uk) equals 0.00355163128 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 (UK) are in 1 Gallon (UK)?

There are exactly 1,280.0005523096 Fluid Dram (UK) in 1 Gallon (UK). This means the conversion factor from Gallon (UK) to Fluid Dram (UK) is 1,280.0005523096.

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

The formula to convert Gallon (UK) to Fluid Dram (UK) is: fl dr (UK) = gal (UK) × 1,280.0005523096. For example, to convert 10 Gallon (UK) to Fluid Dram (UK), you would multiply 10 by 1,280.0005523096.

What is a Gallon (UK)?