Convert gold jewellery weight between grams, kilograms, troy ounces,
pennyweight, tola and grains. Enter the gross weight shown on a scale or
jewellery specification and compare the same mass across common
precious-metal units.
How Gold Jewellery Weight Conversion Works
Jewellery is commonly weighed in grams, but gold markets and jewellery
references can use several other units. This calculator makes it possible
to take one jewellery weight and immediately see its equivalent mass in
kilograms, troy ounces, pennyweight, tola and grains.
The calculation first converts the entered weight into grams. The gram
value is then used as the common base for every other conversion.
1 troy ounce = 31.1034768 grams
1 kilogram = 1,000 grams
1 pennyweight = 1.55517384 grams
1 tola = 11.6638125 grams
1 grain = 0.06479891 grams
Common Gold Jewellery Weight Conversions
| Jewellery Weight |
Troy Ounces |
Pennyweight |
Tola |
| 1 gram |
0.03215075 oz t |
0.64301499 DWT |
0.08573358 tola |
| 2 grams |
0.06430149 oz t |
1.28602999 DWT |
0.17146706 tola |
| 5 grams |
0.16075373 oz t |
3.21507499 DWT |
0.42866791 tola |
| 10 grams |
0.32150747 oz t |
6.43014999 DWT |
0.85733581 tola |
| 20 grams |
0.64301493 oz t |
12.86029998 DWT |
1.71467162 tola |
| 50 grams |
1.60753733 oz t |
32.15074995 DWT |
4.28667905 tola |
| 100 grams |
3.21507466 oz t |
64.30149989 DWT |
8.57335810 tola |
Gold Jewellery Weight and Purity
The weight shown on a jewellery scale normally represents the gross mass
being measured. It does not automatically represent the amount of pure
gold in the item.
Gold jewellery is commonly made from alloys. The fineness or karat rating
indicates how much of the alloy is gold.
Fine Gold Content = Gross Gold-Alloy Weight × Fineness
For example, a 10 gram piece with a fineness of 0.750 contains approximately
7.5 grams of fine gold, before considering any separate non-gold components.
Weight conversion and purity calculation are separate steps.
Jewellery With Gemstones
Extra care is needed when converting the weight of jewellery containing
gemstones or other non-gold components. A scale measures the total mass of
everything included in the weighing.
Therefore, the gross weight of a gemstone ring, pendant or bracelet should
not automatically be treated as the weight of its gold alone.
Gross jewellery weight
The total mass of the item as weighed, potentially including gold,
gemstones and other materials.
Gold alloy weight
The mass attributable to the gold alloy portion of the jewellery.
Fine-gold weight
The amount of pure gold represented by the applicable gold-alloy weight
and fineness.
Grams to Troy Ounces for Jewellery
Grams are commonly used for jewellery weighing, while troy ounces are the
standard ounce measurement for precious metals. To convert grams to troy
ounces, divide the gram weight by 31.1034768.
Troy Ounces = Grams ÷ 31.1034768
For example, 10 grams of mass equals approximately 0.32150747 troy ounces.
Grams to Pennyweight for Jewellery
Pennyweight, abbreviated DWT, is another traditional precious-metal
measurement. One pennyweight equals 1.55517384 grams.
Pennyweight = Grams ÷ 1.55517384
A 10 gram mass therefore corresponds to approximately 6.43015 pennyweights.
Grams to Tola for Jewellery
Tola is a traditional mass unit that remains relevant in parts of the
jewellery and precious-metal trade. The standard conversion used by this
calculator is 1 tola = 11.6638125 grams.
Tola = Grams ÷ 11.6638125
A 10 gram mass is approximately 0.85733581 tola.
Gold Jewellery Weight and Pricing
Weight is only one component of a jewellery price. A price calculation may
also depend on gold purity, the applicable gold rate, workmanship, design,
gemstones, taxes, retailer margins and other charges.
This converter intentionally does not estimate jewellery value because
weight conversion and jewellery valuation are separate calculations.
A heavier jewellery item is not automatically more valuable than a lighter
item if purity, gold content, gemstones, workmanship or other factors differ.
Troy Ounce Versus Regular Ounce
When an ounce is used for gold, it normally refers to a troy ounce. A troy
ounce is different from the standard avoirdupois ounce used for many
everyday products.
| Unit |
Mass |
Typical Use |
| Troy ounce |
31.1034768 g |
Precious metals |
| Avoirdupois ounce |
28.349523125 g |
General goods |
Using the wrong ounce standard can create a significant error when
comparing precious-metal weights or prices.
Measuring Jewellery Weight
For a physical jewellery item, use a suitable precision scale and record
the measured mass before converting it. Jewellery scales may display
grams, carats, pennyweight or other units depending on the equipment.
If a piece contains stones, beads, enamel, clasps made from different
materials or other components, the scale reading represents the combined
mass unless those components are separately accounted for.
Important Limitations
This calculator converts weight units only. It does not identify the
jewellery, verify its gold purity, determine its gold-only weight,
authenticate the item or calculate its market value.
The conversion formulas describe physical mass and do not depend on the
current gold price.
For buying, selling or appraisal decisions, use the actual jewellery
specifications and an appropriate professional assessment when required.
Frequently Asked Questions
What units can I use for gold jewellery weight?
This converter supports grams, kilograms, troy ounces, pennyweight, tola and
grains.
How many grams are in one troy ounce of gold?
One troy ounce equals exactly 31.1034768 grams.
How many grams are in one pennyweight?
One pennyweight equals 1.55517384 grams.
How many grams are in one tola?
One standard tola equals 11.6638125 grams.
Does gold jewellery purity affect its weight?
No. Purity does not change the gross mass conversion. It affects the amount of
fine gold contained within the jewellery.
Is jewellery weight the same as fine gold weight?
Not necessarily. Jewellery can contain alloy metals, gemstones, settings or
other materials, so gross jewellery weight should not automatically be treated
as fine-gold weight.
Can this calculator determine the value of gold jewellery?
No. It converts weight units only. Jewellery value also depends on purity,
gold price, workmanship, gemstones, design, premiums and other factors.
Is a regular ounce the same as a troy ounce?
No. A troy ounce is 31.1034768 grams, while a standard avoirdupois ounce is
approximately 28.349523125 grams.