Free Embeddable Melt Value Calculator Widget
Drop a live precious-metal melt value calculator into any website with one line of HTML. Real spot prices for silver, gold, platinum and palladium, coin presets, and a weight + purity mode. No API key. No signup. No cost.
- Live spot prices — fetched on load, with a safe fallback if the network is down.
- 4 metals — silver (XAG), gold (XAU), platinum (XPT), palladium (XPD).
- Coin presets — 90% dimes/quarters/halves, Morgan & Peace dollars, war nickels, 40% Kennedys, Silver & Gold Eagles.
- Weight & purity mode — grams, troy ounces or dwt at any fineness (sterling, coin silver, gold karats).
- Zero dependencies — self-contained iframe. Won't collide with your site's CSS or JavaScript.
- Responsive & fast — works in a sidebar or a full column; lazy-loaded.
Add it to your site
Paste either snippet wherever you want the calculator to appear.
Option A — iframe (recommended)
<iframe src="https://saltcrate.com/widget/embed.html"
title="Melt value calculator by SaltCrate"
width="100%" height="430" loading="lazy"
style="border:0;border-radius:12px;max-width:460px">
</iframe>Option B — one-line loader script
<script src="https://saltcrate.com/widget/embed.js" async></script>Attribution: the embed is free for commercial and personal use. The only requirement is that the small “Powered by SaltCrate” link at the bottom of the widget remains visible and unmodified — that is what keeps it free.
Want to track your whole stack, not one coin?
The Silver Stacking Spreadsheet logs every coin you own and auto-calculates melt value, purchase cost and profit/loss from a single spot price. 21 pre-loaded coin specs, silver through palladium.
Get the $5 spreadsheet →Common questions
Is the widget really free?
Yes — free to embed on any site, commercial or personal. Just keep the “Powered by SaltCrate” attribution link visible.
Does it need an API key?
No. It reads public spot quotes directly in the browser, so nothing to configure and nothing to leak.
Will it slow my site down?
No. The iframe is lazy-loaded and has no external scripts or fonts beyond the widget itself.
Can I change the colours?
The widget ships in SaltCrate's dark theme. If you need a themeable build for a specific site, the hub stays light — reach out via the main calculator.
More free tools
Full melt value calculator
Live spot, junk-silver tables, and a stack portfolio tracker — all in the browser.
Gold price per gram
24k–10k gold value per gram at today's spot, with the formula and worked examples.
Junk silver values
What 90% and 40% silver is worth per $1 of face value at current spot.
All guides
Per-coin and per-metal melt value guides, updated with live prices.