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: Estate Sale & Inheritance Buyers

Walk Into Any Estate Sale Knowing Exactly What the Box of Jewelry Is Worth

Nu Stack scores every chain, ring, and silver tray in seconds. Don't pay flea-market prices on a kilogram of 14K.

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 the estate-buyer's pocket calculator: live melt value, refinery payout math, AI coin identification for boxes of mystery coins, and a deal gauge that tells you when the lot is worth the asking price.

Why Estate Sale & Inheritance Buyers Choose Nu Stack

Bulk weight, instant total melt

Weigh a tray of sterling, set the purity to .925, and Nu Stack returns the total melt in seconds. Ideal for estate-sale lots priced as a single unit.

AI coin ID for unsorted coin boxes

Snap photos of the unfamiliar coins. Nu Stack returns mint, year, composition, and ballpark value — fast enough to negotiate before someone else does.

Deal Gauge for whole-lot offers

Stack 12 chains and a watch into one entry. Nu Stack averages purity, totals melt, and grades the asking price.

Receipts for executors and heirs

Generate signed PDFs documenting what you bought and what you paid. Useful for the seller, the lawyer, and your own records.

Dealer Map for the next stop

After buying, find the closest refinery, coin dealer, or pawn shop with the Dealer Map — turn intake into outflow the same day.

FEATURES THAT MATTER FOR THIS WORKFLOW

CalculatorCoin IDDeal GaugeReceiptsDealer MapHoldings

What Real Nu Stack Users Are Saying

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

“

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★★★★★

“

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★★★★★

“

The deal scanner is one of the most useful parts of the app. It helps me sort through listings faster and spot the ones that are actually worth looking at.

Deal scanner★★★★★

Frequently Asked Questions

Can Nu Stack appraise antique jewelry?

Nu Stack calculates melt value — the floor under any precious metals piece. Antique craftsmanship and gemstone value are appraisal categories Nu Stack does not cover.

How do I value a mixed lot of unknown coins?

Use Coin ID on each coin, save it to your portfolio, then see the totals on the Coin Portfolio view. For lots of 50+, the Pro tier's Bulk Import accepts a CSV if you've already cataloged elsewhere.

Is Nu Stack legal to use at estate sales?

Yes. It's a calculator. Whether you disclose your buying methodology to the seller is your choice and depends on local rules.

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

Silver Stackers Antique Dealers Scrap Gold & Jewelry Buyers Gold Stackers