How do I calculate scrap gold melt value?

To calculate scrap gold melt value: weigh the item in grams, divide by 31.1035 to get troy ounces, multiply by the karat purity (14K = 0.5833, 18K = 0.7500, 24K = 0.999), then multiply by today's gold spot price. Nu Stack's free calculator does this instantly for any weight and karat combination.

Is Nu Stack a free app?

Nu Stack has a free tier that includes the scrap calculator, inventory tracking, profit dashboard, seller CRM, and receipt generation. Paid tiers add features like coin portfolio tracking, technical analysis, price alerts (Stacker at $4.99/month), and a Chrome extension marketplace scanner, AI coin ID, and dealer map (Pro at $9.99/month).

What is the Nu Stack Chrome Extension?

The Treasure Hunter Chrome extension scans listings on Facebook Marketplace, Facebook Groups, Craigslist, Whatnot, and eBay for gold and silver deals. It overlays color-coded badges showing deal quality based on melt value, so you can spot underpriced listings while browsing. It requires a Pro subscription ($9.99/month).

Nu Stack — Precious Metals Calculator, Portfolio Tracker & Deal Finder

Name: Nu Stack
Author: Daniel Skemp

Nu Stack is a free precious metals calculator and portfolio tracking tool built for scrap gold buyers, silver stackers, coin collectors, pawn shop owners, and dealers. It works in your browser on any device — phone, tablet, or desktop. Add it to your home screen and it acts like a native app. Your data syncs across all your devices in real time.

Scrap Gold and Silver Calculator

Enter the weight and karat of any gold or silver item and see the melt value instantly based on today's spot price. The calculator supports all standard gold karats (10K, 14K, 18K, 22K, 24K) and silver grades (.800, .900, .925, .999), plus XRF custom purity overrides for professional buyers. Enter multiple items at different karats in a single session, set your buy rate to control your margin, and the deal gauge shows you how good the deal is before you commit. Generate PDF receipts with signature capture and photo documentation.

Portfolio Tracking Beyond Spreadsheets

Track every deal you make — what you bought, what you paid, who you bought from, and what it's worth today. The portfolio overview shows your total holdings, metal allocation, and gain/loss updated with live spot prices. The profit dashboard breaks down your P&L by source, metal type, and time period. The seller CRM tracks every deal by seller with notes, contact info, and ratings.

Technical Analysis for Gold and Silver

The strategy panel provides SMA (Simple Moving Average), RSI (Relative Strength Index), and MACD indicators for both gold and silver with buy and sell signals. Track the gold/silver ratio, monitor price trends, and review your historical deal performance with source ROI, seasonal patterns, and win-rate statistics.

Chrome Extension — Treasure Hunter Deal Scanner

The Treasure Hunter Chrome extension scans marketplace listings on Facebook Marketplace, Facebook Groups, Craigslist, Whatnot, and eBay while you browse. It overlays color-coded badges showing deal quality based on melt value — so you can spot good deals instantly without leaving the page. Requires Pro plan.

AI Coin Identification

Take a photo or upload an image of any coin and the AI identifies it using Google Vision and Gemini, providing the coin's identity, specifications, and estimated valuation from a database of over 1,500 coins.

Additional Tools

Nu Stack includes a dealer map for finding pawn shops, coin dealers, thrift stores, and antique shops nearby. The weight assistant uses the Archimedes density method for non-destructive purity testing. Bulk import lets you upload spreadsheets of past deals. Price alerts notify you when gold or silver hits your target. The sell/ship manager tracks outgoing shipments to refineries and buyers with settlement logging.

Pricing

Free: Calculator, inventory, profit dashboard, seller CRM, deal gauge, receipt generation. Stacker ($4.99/mo): Adds coin portfolio, strategy panel, price alerts, sell/ship management, refinery tracker. Pro ($9.99/mo): Adds Chrome extension, dealer map, AI coin ID, weight assistant, bulk import.

Built for Real Precious Metals Buyers

Nu Stack is built by Daniel Skemp, a solo developer in Leander, Texas who buys and sells precious metals. It is not a portfolio tracker for passive holders — it is a complete operating system for people who actively buy, evaluate, sell, and trade gold and silver every day. Whether you buy scrap jewelry at pawn shops, stack bullion, collect coins, or run a dealing business, Nu Stack gives you the tools to make better decisions and track every deal.

Built For: Coin Collectors

The Coin Collector App That Knows the Difference Between Bullion and Numismatic

1,217 coins in the database. Melt value AND collector premium. Photo-based AI coin ID. Your portfolio, finally treated like a portfolio.

Always free to use. Every new account unlocks all Pro features for 2 weeks — no credit card required.

Why It Works ↓

Quick answer: Nu Stack identifies coins from a photo, looks up melt value and collector premium, and tracks your collection with proper cost-basis math. It's a numismatic portfolio tracker that handles bullion, key dates, and graded slabs in one place.

Why Coin Collectors Choose Nu Stack

Snap a photo, get the coin

Camera capture → on-device + cloud AI identification → mint year, denomination, composition, and current market range.

Melt vs. collector premium, side by side

See what the metal alone is worth and what the market is paying. Buy below melt, sell above premium — informed every time.

Buy/sell signals on premium swings

Coin Strategy panel watches premium-to-melt ratios across your favorite series and flags buy or sell windows.

Portfolio that respects key dates

Each coin gets its own row — mint, year, condition, paid, current value, gain. Tag key dates and watch them separately.

Mobile-first, works at coin shows

Built to work fast on a phone in a noisy convention hall. No spreadsheet, no typing while a dealer waits.

FEATURES THAT MATTER FOR THIS WORKFLOW

Coin IDCoin PortfolioCoin StrategyHoldingsAlertsCalculator

What Real Nu Stack Users Are Saying

Direct feedback from buyers, stackers, and collectors using the app.

“

Nu Stack makes it much easier to know what I'm looking at before I buy. Being able to check melt value quickly gives me a lot more confidence when comparing gold and silver deals.

Melt value confidence★★★★★

“

Nu Stack feels like a practical tool for anyone buying physical gold or silver. It gives me better information before I spend money, and that is exactly what I need.

Overall value★★★★★

“

This saves me time. Instead of bouncing between calculators, spot price sites, and notes, I can do most of what I need in one app.

Time savings★★★★★

Frequently Asked Questions

How accurate is the AI coin identification?

Nu Stack's AI handles common US, Canadian, UK, EU, and world bullion plus the major numismatic series. It returns a confidence score and lets you override before saving. It's a starting point, not a substitute for a slab and a loupe.

Does Nu Stack track graded coins?

Yes. Each coin entry supports condition/grade fields, slab notes, and photo upload. Premium tracking applies on top of melt value.

Can I see how my collection has performed over time?

Yes. The Profit Dashboard shows realized P&L by metal, source, and time period. The Portfolio view shows unrealized gains against current spot and premium.

Are PCGS and NGC populations integrated?

Nu Stack uses an internal numismatic database for identification and valuation. Population reports from third-party graders are not currently integrated.

Try Nu Stack Free for 2 Weeks

No credit card. Always free to use. Every Pro feature unlocked for the first 14 days.

Get Started

Free account — no credit card required

Also Built For

Retirees & Long-Term Holders Scrap Gold & Jewelry Buyers Pawn Shop Operators Antique Dealers