Gallon (US) to Fluid Dram (US) Converter

Volume Converter

40 units available

Decimals:

From

To

1,024

1 gal = 1,024 fl dr

Formula:

fl dr = gal × 1,024.0000000035

With your value: 1 gal = 1,024 fl dr

How big is that?

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

Milk carton (1/3.8e+3 your value)0.000264 gal

Kitchen bucket (1/3.8e+2 your value)0.00264 gal

Car fuel tank (1/76 your value)0.0132 gal

Bathtub (1/19 your value)0.0528 gal

Hot tub (1/2.5 your value)0.396 gal

Your value1.00 gal

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

2 gal to fl dr 3 gal to fl dr 4 gal to fl dr 5 gal to fl dr 6 gal to fl dr 7 gal to fl dr 8 gal to fl dr

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

Gallon (US) (gal)	Fluid Dram (US) (fl dr)
0.5	512
1	1,024
2	2,048
5	5,120
10	10,240
15	15,360
20	20,480
25	25,600
50	51,200
100	102,400
250	256,000.000001
500	512,000.000002
1000	1,024,000.000003

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

Fluid Dram (US) (fl dr)	Gallon (US) (gal)
0.5	0.000488
1	0.000977
2	0.001953
5	0.004883
10	0.009766
15	0.014648
20	0.019531
25	0.024414
50	0.048828
100	0.097656
250	0.244141
500	0.488281
1000	0.976562

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 (US) (gal)

Volume

Exact conversion

The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.

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 (US) to Fluid Dram (US)

To convert from Gallon (US) (gal) to Fluid Dram (US) (fl dr), multiply the value by 1,024.0000000035.

Formula: fl dr = gal × 1,024.0000000035

Reverse: gal = fl dr × 0.0009765625

Step-by-Step Example

Start with your value in Gallon (US). For example: 5 gal
Multiply by the conversion factor: 5 x 1,024.0000000035
The result is: 5,120 fl dr

About Gallon (US)

The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.

Fun Fact: The US gallon is about 20% smaller than the imperial (UK) gallon.

Common uses: fuel (US), beverages, swimming pools.

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 (US)?

There are exactly 1,024.0000000035 Fluid Dram (US) in 1 Gallon (US). This means the conversion factor from Gallon (US) to Fluid Dram (US) is 1,024.0000000035.

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

The formula to convert Gallon (US) to Fluid Dram (US) is: fl dr = gal × 1,024.0000000035. For example, to convert 10 Gallon (US) to Fluid Dram (US), you would multiply 10 by 1,024.0000000035.

What is a Gallon (US)?