Troy Pound to Carat Converter

Mass Converter

26 units available

Decimals:

From

To

1,866.208608

1 lb t = 1,866.208608 ct

Formula:

ct = lb t × 1,866.208608

With your value: 1 lb t = 1,866.208608 ct

How big is that?

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

AA battery (1/16 your value)0.0643 lb t

Your value1.00 lb t

Can of soda (1.0× your value)1.04 lb t

Bag of sugar (2.7× your value)2.68 lb t

House cat (12× your value)12.1 lb t

Adult human (1.9e+2× your value)188 lb t

Other Troy Pound to Carat conversions

2 lb t to ct 3 lb t to ct 4 lb t to ct 5 lb t to ct 6 lb t to ct 7 lb t to ct 8 lb t to ct

Troy Pound to Carat Conversion Table

Troy Pound (lb t)	Carat (ct)
0.5	933.104304
1	1,866.208608
2	3,732.417216
5	9,331.04304
10	18,662.08608
15	27,993.12912
20	37,324.17216
25	46,655.2152
50	93,310.4304
100	186,620.8608
250	466,552.152
500	933,104.304
1000	1,866,208.608

Carat to Troy Pound Conversion Table

Carat (ct)	Troy Pound (lb t)
0.5	0.000268
1	0.000536
2	0.001072
5	0.002679
10	0.005358
15	0.008038
20	0.010717
25	0.013396
50	0.026792
100	0.053585
250	0.133961
500	0.267923
1000	0.535846

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 Pound (lb t)

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

Carat (ct)

Mass

Conventional value

The metric carat is exactly 200 mg, agreed internationally in 1907.

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

How to Convert Troy Pound to Carat

To convert from Troy Pound (lb t) to Carat (ct), multiply the value by 1,866.208608.

Formula: ct = lb t × 1,866.208608

Reverse: lb t = ct × 0.0005358458

Step-by-Step Example

Start with your value in Troy Pound. For example: 5 lb t
Multiply by the conversion factor: 5 x 1,866.208608
The result is: 9,331.04304 ct

About Troy Pound

The troy pound equals 12 troy ounces, about 373.24 grams — lighter than the familiar avoirdupois pound.

Common uses: precious metals, bullion, numismatics.

About Carat

The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.

Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.

Common uses: gemstones, diamonds, jewelry.

Frequently Asked Questions

How many Carat are in 1 Troy Pound?

There are exactly 1,866.208608 Carat in 1 Troy Pound. This means the conversion factor from Troy Pound to Carat is 1,866.208608.

What is the formula to convert Troy Pound to Carat?

The formula to convert Troy Pound to Carat is: ct = lb t × 1,866.208608. For example, to convert 10 Troy Pound to Carat, you would multiply 10 by 1,866.208608.

What is a Troy Pound?