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 Shop Dealers

The Coin Dealer's App for Tighter Margins on Every Transaction

Live spot. Live premium. Live AI coin ID. Live deal scoring. Built so the counter can quote a buy price faster than the customer can second-guess it.

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 coin dealer's working calculator — live precious metals spot, real-time premium tracking on Eagles, Maples, and major numismatic series, AI photo identification, and a strategy panel that surfaces buy and sell windows on the products you actually carry.

Why Coin Shop Dealers Choose Nu Stack

Premium math for every common product

Eagles, Maples, Krugs, sovereigns, AGE/ASE fractionals — Nu Stack tracks the premium-over-spot you paid and the current bid/ask premium.

Coin ID for over-the-counter intake

Photo a customer's tin, get a sortable list of coins with bullion vs. numismatic flagging in seconds.

Strategy signals on the products you stock

TA-grade SMA/RSI/MACD signals on gold and silver, plus premium-cycle signals on Eagles and Maples specifically.

Inventory with refinery batch grouping

Group scrap and broken jewelry into a refinery batch. Pull a settlement report when the wire hits.

Dealer Map for cross-shop arbitrage

Know which neighboring coin shops you've visited, what they paid, and where the price gradients live.

FEATURES THAT MATTER FOR THIS WORKFLOW

CalculatorCoin IDCoin StrategyHoldingsMarket UpdatesSell / Ship

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★★★★★

“

I like having my stack organized in one place. Seeing what I own, what I paid, and where things stand today makes the app feel really practical.

Inventory tracking★★★★★

“

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

Is Nu Stack a replacement for full coin-shop POS software?

No. Nu Stack is a buying-side calculator and portfolio tool. Cash drawer, customer loyalty, and ID-scanning compliance live in dedicated coin-shop POS systems.

Does the AI coin ID work on graded slabs?

Yes — for the coin itself. Slab grade and grader population are separate datasets Nu Stack does not currently integrate.

Can I track over-the-counter scrap separately from numismatic inventory?

Yes. The Holdings ledger and Coin Portfolio are separate views, with Holdings handling scrap and bullion bars and Coin Portfolio handling individual coins.

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

Coin Collectors Scrap Gold & Jewelry Buyers Beginners Antique Dealers