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: Deal Hunters & Flippers

The Deal Scanner That Finds Under-Melt Gold While You're at Work

Marketplace, Craigslist, Whatnot — Nu Stack scores listings against live melt value so you only chase the ones worth chasing.

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's Online Listings feed and Chrome Extension scan precious metals listings, score them against live spot, and surface only the ones priced below melt — so flippers spend time closing deals, not scrolling through scams.

Why Deal Hunters & Flippers Choose Nu Stack

Configurable search pills

Set what you're hunting — 14K, sterling, Eagles, scrap chains — and the scanner only shows you those.

Score on every listing

Every result gets a melt-value score and a deal grade. Skip the bad ones in two seconds, screenshot the good ones.

Chrome Extension for live browsing

Treasure Hunter overlays scoring directly on Marketplace, Craigslist Groups, and Whatnot. Your spot price math, on the listing page.

Strategy History for win-rate tracking

Log which deals you closed, which you passed, and what they sold for. Nu Stack shows your real ROI by source and product type.

Holdings ledger for exit math

Every flip lands in your inventory with cost basis, sale price, and profit. Quarterly tax math is one CSV export away.

FEATURES THAT MATTER FOR THIS WORKFLOW

Online ListingsTools (Chrome Extension)Deal GaugeHoldingsPerformance TrackingSell / Ship

What Real Nu Stack Users Are Saying

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

“

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★★★★★

“

The price alerts are great because I don't have to keep checking spot prices all day. I can set my target and let the app tell me when it matters.

Price alerts★★★★★

“

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★★★★★

Frequently Asked Questions

Does Nu Stack scrape Facebook Marketplace automatically?

Nu Stack's Chrome Extension overlays scoring on listings as you browse. The cloud scanner indexes public results from Marketplace Groups, Craigslist, and Whatnot. Nu Stack does not bypass any platform's terms of service.

Is the deal scanner included in the free tier?

Online Listings and the Chrome Extension are part of the Pro tier — included free for 14 days on every new account.

Can I track which platforms I make the most money on?

Yes. Performance Tracking breaks down realized profit by source, metal, and time period. Most flippers find one or two channels carry the bulk of their margin.

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 Antique Dealers Pawn Shop Operators Retirees & Long-Term Holders