Troy Ounce to Dram Converter

Mass Converter

26 units available

Decimals:

From

To

17.554286

1 oz t = 17.554286 dr

Formula:

dr = oz t × 17.5542857143

With your value: 1 oz t = 17.55428571 dr

How big is that?

Everyday references on a logarithmic scale, all expressed in troy ounce so you can sanity-check the result.

Paperclip (1/31 your value)0.0322 oz t

AA battery (1/1.3 your value)0.772 oz t

Your value1.00 oz t

Can of soda (13× your value)12.5 oz t

Bag of sugar (32× your value)32.2 oz t

House cat (1.4e+2× your value)145 oz t

Other Troy Ounce to Dram conversions

2 oz t to dr 3 oz t to dr 4 oz t to dr 5 oz t to dr 6 oz t to dr 7 oz t to dr 8 oz t to dr

Troy Ounce to Dram Conversion Table

Troy Ounce (oz t)	Dram (dr)
0.5	8.777143
1	17.554286
2	35.108571
5	87.771429
10	175.542857
15	263.314286
20	351.085714
25	438.857143
50	877.714286
100	1,755.428571
250	4,388.571429
500	8,777.142857
1000	17,554.285714

Dram to Troy Ounce Conversion Table

Dram (dr)	Troy Ounce (oz t)
0.5	0.028483
1	0.056966
2	0.113932
5	0.284831
10	0.569661
15	0.854492
20	1.139323
25	1.424154
50	2.848307
100	5.696615
250	14.241536
500	28.483073
1000	56.966146

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.

Troy Ounce (oz t)

Mass

Exact conversion

1 troy ounce = 480 grains = 0.031 103 476 8 kg exactly. Used for precious metals only.

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

Dram (dr)

Mass

Exact conversion

Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Troy Ounce to Dram

To convert from Troy Ounce (oz t) to Dram (dr), multiply the value by 17.5542857143.

Formula: dr = oz t × 17.5542857143

Reverse: oz t = dr × 0.0569661458

Step-by-Step Example

Start with your value in Troy Ounce. For example: 5 oz t
Multiply by the conversion factor: 5 x 17.5542857143
The result is: 87.771429 dr

About Troy Ounce

The troy ounce equals approximately 31.1 grams and is used for weighing precious metals like gold, silver, and platinum.

Common uses: gold trading, silver markets, precious metals.

About Dram

The dram (dr) is a unit of mass and weight. One dram equals 0.001771845195 kilograms. UnitConvertLab converts it against every other mass unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Dram are in 1 Troy Ounce?

There are exactly 17.5542857143 Dram in 1 Troy Ounce. This means the conversion factor from Troy Ounce to Dram is 17.5542857143.

What is the formula to convert Troy Ounce to Dram?

The formula to convert Troy Ounce to Dram is: dr = oz t × 17.5542857143. For example, to convert 10 Troy Ounce to Dram, you would multiply 10 by 17.5542857143.

What is a Troy Ounce?