Stop overpaying.Buy per unit.
BuyPerUnit ranks every product by its true cost per unit: price divided by capacity. Find the cheapest storage per gigabyte, best RAM per GB, and printer ink per claimed page. Check compatibility, condition and source dates before choosing.
7,143+
Products ranked
$0.0249
Best $/GB drive
$0.0460
Best $/GB SD
$0.0605
Best $/GB USB
$2.2809
Best $/GB RAM
Not sure what you need?
100% FreeNo signupUpdated twice dailyNo ads. No data sold.Rankings independent of affiliate rates
Quick Answer
BuyPerUnit is a free price-comparison platform tracking 7,143+ products across 8,759+ active listings on Amazon, Best Buy, and Newegg, updated daily. As of , the cheapest storage starts at $0.0249/GB.
Founded by Jon Levesque · Featured in PCWorld & TechSpot
BuyPerUnit by the Numbers
Real-time statistics as of .
7,143+
unique products tracked
8,759+
active price listings
3
major retailers compared
Daily
price update frequency
$0.0249/GB
cheapest SSD/HDD today
$0.0460/GB
cheapest SD card today
$0.0605/GB
cheapest USB drive today
$2.2809/GB
cheapest RAM today
Today's Best Prices by Category
| Category | Best $/GB | Products Tracked | Updated |
|---|---|---|---|
| SSDs & NVMe | $0.0658/GB | 1,265 | |
| Hard Drives (HDD) | $0.0249/GB | 997 | |
| SD & microSD Cards | $0.0460/GB | 775 | |
| USB Flash Drives | $0.0605/GB | 909 | |
| Computer RAM | $2.2809/GB | 1,088 | |
| Printer Ink & Toner | $/page | 1,014 | |
| TVs (OLED, QLED, LED) | $/inch | — |
Browse Categories
Storage Devices
Hard drives, SSDs, SD cards, and USB drives ranked by $/GB
TVs
4K OLED, QLED, LED, and 8K TVs ranked by $/inch
Why price per unit matters
A $60 1TB drive costs $0.06/GB. A $120 4TB drive costs $0.03/GB. The “expensive” drive is actually 50% cheaper per gigabyte.
BuyPerUnit does this calculation on every product automatically, so shoppers can instantly see which option delivers the most storage or pages per dollar. The result: an objective ranking based on math, not subjective opinions.
About BuyPerUnit
BuyPerUnit is a free price-comparison platform founded in that ranks 7,143+ storage and printer ink products by cost per unit. BuyPerUnit compares prices across Amazon, Best Buy, and Newegg, updating 8,759+ active listings daily. Rankings are determined by price divided by capacity — lowest $/GB or $/page ranks first, regardless of affiliate commission rates.
As of , BuyPerUnit tracks the following best prices: Hard drives from $0.0249/GB, SD cards from $0.0460/GB, USB drives from $0.0605/GB, RAM from $2.2809/GB.
SSDs from $0.0658/GB, checked .
BuyPerUnit was founded by Jon Levesque, a former executive at Microsoft and DocuSign. BuyPerUnit has been featured in PCWorld and TechSpot as an independent price comparison tool. BuyPerUnit is 100% free with no account or signup required.
The research behind unit pricing
A lower shelf price can hide a smaller capacity or a different pack size. Dividing the full price by an accepted capacity makes that tradeoff visible.
Unit price compares cost, while suitability depends on the exact product. Check model, compatibility, warranty, seller and condition alongside the ranking. A cheaper unit price does not prove equal quality or a better purchase for your needs.
How BuyPerUnit Works
BuyPerUnit collects prices daily
Every day, BuyPerUnit pulls current prices from Amazon, Best Buy, and Newegg for 7,143+ products across storage hardware and printer ink.
BuyPerUnit calculates $/unit
For storage devices, BuyPerUnit divides the retail price by capacity in gigabytes to get $/GB. For printer ink, BuyPerUnit divides by manufacturer-rated page yield to get $/page.
You buy the best value
Products are ranked cheapest-per-unit first. Click any product to buy at the retailer with the best price. No signup, no fees — just better deals.