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: Antique Dealers

Built for Antique Dealers Who Buy More Than Just Furniture

Sterling, gold-filled, demitasse spoons, pocket watches, coin collections. Nu Stack puts a melt floor under every precious-metal item that walks in the door.

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 helps antique dealers value the precious metals portion of their inventory with live melt math, AI coin identification, and a deal gauge that flags overpriced lots before you write the check.

Why Antique Dealers Choose Nu Stack

Sterling silver math, the right way

Trays, flatware, candlesticks — set the .925 purity, weigh, and Nu Stack returns the melt. Filtering Sheffield from sterling matters; Nu Stack helps you stop overpaying on silver-plate.

Gold-filled and rolled-gold awareness

Nu Stack tracks tagged purity for gold-filled and rolled-gold-plate items so they don't get logged as solid gold by mistake.

AI coin ID for shop walk-ins

When somebody brings in a tin of coins, snap photos and let the app sort the bullion from the wheat pennies in under a minute.

Inventory ledger that feeds the booth

Every metal piece tagged with cost basis and current melt. Pull a CSV when you re-tag prices for a fair next month.

Sellers CRM for repeat suppliers

Know which estate liquidator brings the best gold-to-silver ratio. Track every relationship over time.

FEATURES THAT MATTER FOR THIS WORKFLOW

CalculatorCoin IDHoldingsDeal GaugeSellers CRMReceipts

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★★★★★

“

The dealer map is a nice bonus. It makes it easier to find local shops and keep track of places I may want to visit again.

Local dealer use★★★★★

“

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

Does Nu Stack value antique jewelry beyond melt?

Nu Stack provides a melt floor only — the metal value before craftsmanship or provenance. Antique premium is dealer expertise; Nu Stack supplies the math underneath it.

Can I track silver flatware sets in Nu Stack?

Yes. Add the set as a single inventory entry with total weight and purity. Photo upload supported.

What about gold-filled or vermeil items?

Tag them with the labeled purity (commonly 1/20 or 1/10 by weight for gold-filled). Nu Stack will compute the actual fine-gold content rather than treating the whole piece as solid.

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 Gold Party Hosts