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: Pawn Shop Operators

Built for Pawn Shops That Won't Lose Money on Metal

Counter staff, owners, and assistant managers all use the same numbers. Stop overpaying because somebody guessed the karat.

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 is a pocket-sized buying calculator built for pawn shop counters. Live spot, automatic refinery math, on-screen signature capture, and a deal gauge that flags thin offers before they hit the till — all in a free app.

Why Pawn Shop Operators Choose Nu Stack

One source of truth for every employee

Train new buyers on the same Deal Gauge thresholds you use. No more 'I thought it was a good deal' surprises in your monthly P&L.

Receipts with your shop's logo and address

Branded PDF receipts in seconds. Compliance-ready signature pad. Works on the counter tablet or phone.

Sellers CRM for repeat customers

Track every regular's history, notes, and average ticket. Spot your best repeat sellers — and the ones who shop everyone first.

Inventory ledger ready for refinery batches

Group purchases into refinery batches with a single tap. Every gram tracked from intake to settlement.

8 currencies for cross-border shops

USD, CAD, EUR, GBP, AUD, CHF, INR, JPY — all live. Run the same shop in a different country with the same app.

FEATURES THAT MATTER FOR THIS WORKFLOW

CalculatorDeal GaugeReceiptsSellers CRMBulk ImportHoldings

What Real Nu Stack Users Are Saying

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

“

I can see myself paying for this because it helps me make better buying decisions. Avoiding one bad deal could easily cover the cost.

Subscription value★★★★★

“

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★★★★★

Frequently Asked Questions

Can multiple staff members use Nu Stack at one shop?

Yes. Every employee creates their own free account and uses the same calculator. Subscription tiers are per-account; many shops have everyone on Free or one Pro account at the counter.

Does Nu Stack store seller IDs or comply with state buy-record laws?

Nu Stack captures seller name, contact, photo, and signature on each transaction. Legal hold-period and ID-reporting requirements vary by state — Nu Stack is a tool, not a compliance product.

Can I export my buy records for accounting?

Yes. Holdings and seller records export to CSV from the Holdings view. Pro tier adds bulk-import for migrating legacy data.

Is there an offline mode for spotty shop Wi-Fi?

Calculator math runs locally; spot prices need a network refresh every 60 seconds, but the last fetched price stays available offline.

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

Antique Dealers Metal Detectorists & Treasure Hunters Estate Sale & Inheritance Buyers Scrap Gold & Jewelry Buyers