{"id":20241,"date":"2026-10-05T05:42:08","date_gmt":"2026-10-05T04:42:08","guid":{"rendered":"https:\/\/metalsradar.com\/glossary\/troy-ounce\/"},"modified":"2026-10-05T07:44:57","modified_gmt":"2026-10-05T06:44:57","slug":"troy-ounce","status":"publish","type":"page","link":"https:\/\/metalsradar.com\/gb\/glossary\/troy-ounce\/","title":{"rendered":"Troy Ounce"},"content":{"rendered":"<div class=\"mrf-gl\"><p class=\"gl-def\">A troy ounce is the unit used to weigh and price precious metals. It equals 31.1035 grams, about 10% more than the ordinary (avoirdupois) ounce of 28.3495 grams used for food in the UK.<\/p><aside class=\"panel gl-live\"><p class=\"gl-live-h\">\ud83c\uddec\ud83c\udde7 Today in the UK<\/p><div class=\"gl-row\"><span>Gold, 1 troy ounce (spot)<\/span><b>\u00a33,150<\/b><\/div><div class=\"gl-row\"><span>Cheapest 1 oz gold coin: <a href=\"https:\/\/metalsradar.com\/gb\/product\/1-oz-krugerrand-gold-coin\/\">1 oz Krugerrand Gold Coin<\/a><\/span><b>\u00a33,173.61<\/b> <small>+0.8% premium<\/small><\/div><p class=\"gl-src\">Data as of 05.10.2026, updated daily.<\/p><a class=\"btn primary\" href=\"https:\/\/metalsradar.com\/gb\/cheapest-gold-coins\/\">Compare gold coin prices \u203a<\/a><\/aside><div class=\"gl-body\"><p>The full conversion table and the history of the unit are in our <a href=\"\/gb\/blog\/troy-ounce-definition-history-and-conversion-table-essential-guide\/\">troy ounce guide for UK buyers<\/a>. This entry covers what the troy ounce means when you compare prices: fine weight, gross weight and the cost per ounce of pure gold.<\/p><h2>Gross weight and fine weight<\/h2><p>A coin has two weights. Gross weight is what it weighs on the scales. Fine weight is the pure gold or silver inside, worked out from the <a href=\"fineness}}\">fineness<\/a>. Dealers price bullion on fine weight, so this is the number to compare.<\/p><h3>Example: Britannia vs Sovereign<\/h3><ul><li><strong>1 oz gold Britannia<\/strong>: gross weight 31.21 g at 999.9 fineness, so it holds one full troy ounce of gold.<\/li><li><strong>Full Sovereign<\/strong>: gross weight 7.98 g at 22 carat (916.7). Fine weight is 7.98 x 0.9167 = 7.32 g, which is 7.32 \/ 31.1035 = 0.2354 troy oz.<\/li><\/ul><p>So roughly 4.25 Sovereigns contain the same gold as one 1 oz Britannia. To compare them fairly, divide each delivered price by its fine weight. Our <a href=\"\/gb\/charts\/gold-price\/gold-price-per-gram\/\">gold price per gram in pounds<\/a> helps with grams, and the <a href=\"\/gb\/product\/1-oz-britannia-gold-coin\/\">1 oz gold Britannia price comparison<\/a> shows what UK dealers charge for a full ounce today.<\/p><h2>Why it matters when you buy in the UK<\/h2><p>The <a href=\"spot-price}}\">spot price<\/a> is quoted per troy ounce in US dollars and converted into pounds. Bars sold in grams (1 g, 20 g, 100 g) need converting before you can compare them with ounce coins: a 100 g bar holds 3.215 troy ounces. When you work out the <a href=\"premium}}\">premium over spot<\/a>, always use the fine weight in troy ounces, or the percentage will be wrong.<\/p><p>Watch out for listings that just say &quot;1 ounce&quot; on cheap medallions or plated items. Genuine <a href=\"bullion}}\">bullion<\/a> states the fine weight and fineness on the coin or the bar.<\/p><\/div><h2>Related terms<\/h2><p class=\"gl-chips\"><a class=\"gl-chip\" href=\"https:\/\/metalsradar.com\/gb\/glossary\/fineness\/\">Fineness<\/a> <a class=\"gl-chip\" href=\"https:\/\/metalsradar.com\/gb\/glossary\/spot-price\/\">Spot Price<\/a> <a class=\"gl-chip\" href=\"https:\/\/metalsradar.com\/gb\/glossary\/bullion\/\">Bullion<\/a><\/p><section class=\"mrf-faq\"><h2>FAQ<\/h2><div class=\"faq-list\"><details open><summary><h3>Where can I find a troy ounce conversion table?<\/h3><\/summary><div class=\"a\"><p>Our troy ounce guide on the blog has the full conversion table and the history of the unit. This entry focuses on fine weight when you compare UK coin prices.<\/p><\/div><\/details><details><summary><h3>How many troy ounces are in a gold Sovereign?<\/h3><\/summary><div class=\"a\"><p>A full Sovereign holds 7.32 g of fine gold, which is 0.2354 troy ounces.<\/p><\/div><\/details><details><summary><h3>Is gold priced in troy ounces in the UK?<\/h3><\/summary><div class=\"a\"><p>Yes. UK dealers and the London market quote gold per troy ounce, although many shops also show a price per gram or per kilogram.<\/p><\/div><\/details><\/div><\/section><details class=\"gl-src-list\"><summary>Sources<\/summary><ul><li><a href=\"https:\/\/www.royalmint.com\/\" rel=\"nofollow noopener\" target=\"_blank\">The Royal Mint<\/a><\/li><li><a href=\"https:\/\/www.lbma.org.uk\/publications\/good-delivery-rules\/technical-specifications\" rel=\"nofollow noopener\" target=\"_blank\">LBMA: Good Delivery Rules, technical specifications<\/a><\/li><\/ul><\/details><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":0,"featured_media":0,"parent":20233,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0,"footnotes":""},"class_list":["post-20241","page","type-page","status-publish","hentry"],"taxonomy_info":[],"featured_image_src_large":false,"author_info":{"display_name":"","author_link":"https:\/\/metalsradar.com\/gb\/"},"comment_info":0,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/pages\/20241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/comments?post=20241"}],"version-history":[{"count":1,"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/pages\/20241\/revisions"}],"predecessor-version":[{"id":20329,"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/pages\/20241\/revisions\/20329"}],"up":[{"embeddable":true,"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/pages\/20233"}],"wp:attachment":[{"href":"https:\/\/metalsradar.com\/gb\/wp-json\/wp\/v2\/media?parent=20241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}