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: Scrap Gold & Jewelry Buyers

The Scrap Gold Buyer's Calculator That Pays for Itself in One Deal

Stop running mental math at the counter. Nu Stack scores every karat, every gram, every offer — before you write a single check.

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 free scrap gold calculator and buying companion built specifically for independent gold buyers. Enter weight and karat, see live melt value in your currency, factor in your refinery payout percentage, and get a profitability grade on every deal — all on your phone in under five seconds.

Why Scrap Gold & Jewelry Buyers Choose Nu Stack

Live melt value, not yesterday's spot

Spot prices refresh every 60 seconds in 8 currencies. The number on your screen is the number the refinery will see Monday morning.

Refinery payout dialed to your contract

Set your refinery's percentage once. Nu Stack does the back-math so you know your true cost basis instantly.

Deal Gauge before you commit

A KBB-style arc shows whether the offer is a steal, fair, thin, or a loss — at a glance, in front of the seller.

Voice input for hands-free counter use

Speak the weight and karat. Nu Stack logs it. No typing while you've got jewelry in one hand and a loupe in the other.

Receipts and signature capture in-app

Generate a PDF receipt with your business logo and capture the seller's signature on screen — paper-free compliance.

FEATURES THAT MATTER FOR THIS WORKFLOW

CalculatorDeal GaugeHoldingsReceiptsSellers CRMVoice Input

What Real Nu Stack Users Are Saying

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

“

As someone still learning, this app makes gold and silver less intimidating. I can check values, understand the deal better, and feel like I'm not guessing.

Beginner buyer★★★★★

“

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★★★★★

“

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

Is Nu Stack free for scrap gold buyers?

Yes. The calculator, melt value, deal gauge, inventory, and receipt tools are free forever. Every new account also unlocks Pro features for 2 weeks — no credit card required.

Can I set my own refinery payout percentage?

Yes. Set the refinery rate per session or save it as a default. Nu Stack uses it to compute your true buy-side margin on every entry.

Does Nu Stack support karats other than 10K, 14K, and 18K?

Yes. Standard karats (10K, 12K, 14K, 18K, 22K, 24K) plus silver grades (.800, .900, .925, .999) are all supported, including XRF purity overrides for verified pieces.

Can I import old purchase records?

Yes — Pro tier includes a Bulk Import tool that maps CSV or Excel columns into Nu Stack's holdings ledger.

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

Small Refiners & Brokers Silver Stackers Gold Party Hosts Deal Hunters & Flippers