stone to carats | Exact Decimal + Stone/Pounds

1 Stone = 31751.4659 Carat

One stone equals about 31.8 thousand carats (exactly 31751.4659 ct). Real-world use: body weight in the UK and ireland, where people often report weight in stones and pounds. This page expresses those values in carats, which is used for diamonds and other precious stones; a 1-carat diamond weighs 200 milligrams. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Stone and Carat

Stone (st)

A stone is 14 pounds or exactly 6.35029318 kilograms.

Where it's used: Body weight in the UK and Ireland, where people often report weight in stones and pounds.

Carat (ct)

A carat is exactly 0.2 grams, the standard unit for gemstone weight.

Where it's used: Diamonds and other precious stones; a 1-carat diamond weighs 200 milligrams.

Weight & Mass Converter

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Precision

Formula

ct = st × 31751.4659

To convert Stone to Carat, use the formula displayed above.

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Stone to Carat: Quick Reference Table

Stone	Carat (Decimal)	Fraction	Real-world equivalent
0.001 st	31.751466 ct	31 3/4 ct	multiple unit increments
0.01 st	317.514659 ct	317 33/64 ct	multiple unit increments
0.1 st	3175.14659 ct	3175 9/64 ct	multiple unit increments
0.5 st	15875.73295 ct	15875 47/64 ct	multiple unit increments
1 st	31751.4659 ct	31751 15/32 ct	multiple unit increments
2 st	63502.9318 ct	63502 15/16 ct	multiple unit increments
5 st	158757.3295 ct	158757 21/64 ct	multiple unit increments
10 st	317514.659 ct	317514 21/32 ct	multiple unit increments
25 st	793786.6475 ct	793786 41/64 ct	multiple unit increments
50 st	1587573.295 ct	1587573 19/64 ct	multiple unit increments
100 st	3175146.59 ct	3175146 19/32 ct	multiple unit increments
250 st	7937866.475 ct	7937866 15/32 ct	multiple unit increments
500 st	15875732.95 ct	15875732 61/64 ct	multiple unit increments
1000 st	31751465.9 ct	31751465 29/32 ct	multiple unit increments

st to ct Formula and Examples

Direct Formula ct = st × 31751.4659

Inverse Formula st = ct × 0.000031

Mental Math Shortcut

Multiply the value by roughly 31751.5 to calculate the equivalent amount in your head.

Common Stone to Carat Calculations

5 st = 158757.3295 ct
10 st = 317514.659 ct
50 st = 1587573.295 ct
100 st = 3175146.59 ct
500 st = 15875732.95 ct

Precision & Practical Use

For example, 10 st = 317514.659 ct — roughly multiple unit increments.

Kitchen scales typically resolve to 1 gram or 0.1 oz, while lab and industrial scales go further. Round the converted result to the smallest unit your scale can actually display.

Related Specialist Weight & Mass Calculators & Niche Tools

Standard weight and mass units like kilograms, pounds, grams, and ounces are used globally, but specific industries like culinary baking, metallurgy, and construction logistics demand much more detailed density and structural load conversions.

In culinary arts, baking success relies on converting ingredient weight (grams) from volume (cups, tablespoons) because packing density differs between flour, butter, and white sugar. In heavy fabrication, steel weight calculators estimate raw beam or plate weights based on linear dimensions and metal grades, while rebar calculators determine structural reinforcement loading. For land developers, gravel weight calculators convert volume in cubic yards into tons to estimate hauling weights. Using these specialized weight calculators prevents structural calculation errors and material shipping underestimations.

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How to Convert Stone to Carat

How many carats are in one stone?

One Stone (st) equals 31751.4659 Carat (ct). To convert stones to carats, multiply the stone value by 31751.4659.

How do I convert Stone to Carat?

Multiply your stone value by 31751.4659 to get the result in Carat: ct = st × 31751.4659. For example, 5 st = 158757.3295 ct.

What is the formula for converting st to ct?

The conversion formula is ct = st × 31751.4659. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for st to ct?