Size Guides & Weight Conversions

The Weight Converter covers the common units used for jewellery, precious metals and gemstones, including grams, kilograms, troy ounces, standard ounces, pounds, pennyweight, tola, grains and gemstone carats.

1 troy ounce equals exactly 31.1034768 grams.

1 gram equals approximately 0.0321507466 troy ounces.

1 tola equals 11.6638038 grams.

1 tola equals 0.375 troy ounce.

1 troy ounce equals 20 pennyweights, usually abbreviated to dwt.

1 pennyweight equals 1.55517384 grams.

1 gram equals approximately 0.6430149314 pennyweight.

1 troy ounce equals 480 grains.

1 grain equals 0.06479891 grams.

1 standard or avoirdupois ounce equals exactly 28.349523125 grams.

No. A troy ounce used for precious metals is 31.1034768 grams, while a standard or avoirdupois ounce is 28.349523125 grams.

1 kilogram equals 1,000 grams.

1 kilogram equals approximately 32.1507466 troy ounces.

1 standard or avoirdupois pound equals exactly 453.59237 grams.

1 troy pound equals 12 troy ounces, which equals 373.2417216 grams.

For diamonds and gemstones, 1 carat equals 0.2 gram, or 200 milligrams.

1 gram equals 5 gemstone carats.

No. A gemstone carat is a unit of weight. Gold carat describes gold purity, such as 9ct, 18ct or 22ct.

1 tola equals 7.5 pennyweights.

1 pennyweight equals 24 grains.

Yes. Gold Factory provides size guides to help customers before purchasing suitable jewellery.

Available guides include the Ring Size Guide, Children's Ring Size Guide, Bangle Size Guide, Bracelet Size Guide and Chain & Necklace Length Guide.

No. Age can provide only rough guidance. Measuring the finger is a more reliable way to choose a child's ring size.

Yes. The Weight Converter converts common jewellery and precious-metal weight units including grams, kilograms, troy ounces, standard ounces, pounds, pennyweight, tola, grains and gemstone carats.

No. The Weight Converter converts units. The Gold Calculator uses Gold Factory buying rates and entered purity and weight to estimate the value of gold being offered for sale.