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 Scrap Gold & Jewelry Buyers Choose Nu Stack
Live melt value, not yesterday's spot
Spot prices refresh every 60 seconds in 8 currencies. Your melt value is always based on current spot, not yesterday's close.
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 and capture the seller's signature on screen. Stacker and up add your business name and logo.
Frequently Asked Questions
Is Nu Stack free for scrap gold buyers?
Yes. The calculator, live melt value, deal gauge and Quick Deal are free forever. Saving purchases, receipts and your inventory starts with Basic at $1.99/mo (up to 50 items). 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 — the Stacker plan ($4.99/mo) and up include a Bulk Import tool that maps CSV or Excel columns into Nu Stack's holdings ledger.
Is there a plan for buying businesses?
Yes. Business ($39/mo) adds business tools on top of Pro: seller ID records and hold periods, QuickBooks export, and compliance and period reports. Founding Members: the first 20 shops get the business tools at the Pro price ($9.99/mo).
Try Nu Stack Free for 2 Weeks
No credit card. Always free to use. Every Pro feature unlocked for the first 14 days.
Create your free account
2 weeks of Pro free — no credit card required