HP · Voyager · July 1982 to January 1989
HP called the 16C the most powerful calculator ever designed for computer science and digital electronics, and it's the only programmer's calculator HP built. It works in hex, decimal, octal and binary, with word sizes from 1 to 64 bits, unsigned or 1's or 2's complement, and it does AND, OR, XOR, shifts, rotates and masks at the press of a key. Floating point is decimal only. It arrived on July 1, 1982 with the 15C and left in January 1989, and later HPs like the 42S absorbed most of its functions. For decades it was the one Voyager HP never revived, until HP's licensee Moravia brought out the HP 16c Collector's Edition. An original still has the slow, deliberate feel of the 1980s chip.
Good forEngineeringCollecting
Bench check
Should come with it
Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.
No hardware faults are documented. Check the button cells, the display and every key, and that it's an original rather than the 2025 reissue.
New to old calculators? The condition checklist covers battery corrosion, displays, keys and card readers, and RPN in one hour gets you typing on an HP.
Buying guide
We'd buy the 16C titled tested and working with a case at $137 delivered, about $60 under the $197 median. There are at least 33 for sale and most ask $160 to $280 delivered, with $197 buying the full kit of case and manual titled tested. Check the face reads HP-16C with no Collector's Edition script and ask for a photo inside the battery door, since three button cells mean an original and HP's licensee now sells a Collector's Edition on two CR2032s. The cheapest at $106 works but its title warns of LCD bleed, and two accounts list the same title at $192 each, so ask those for photos of the serial label. Skip the Japan listing at $634, over three times the median.
$106.33est. delivered
The lowest delivered 16C, at $106, titled working with a case. The title warns of LCD bleed, so ask for a photo of the display lit to see how much of it is affected.
HP 16C Calculator Hewlett Packard Calculator with Case Works but LCD Bleed READ
$136.96est. delivered
Titled tested and working with a case at $137 delivered, about $60 under the $197 median. The photo shows it switched off, and the seller uses the same photo on a second unit, so ask for a photo of this one lit in HEX mode.
Hewlett-Packard HP 16C Computer Programming Calculator W/Case -Tested - Works
$196.85est. delivered
The complete kit, titled tested and working with the case and manual, at $197 delivered, right at the median. Buy this one if you want the handbook to learn the integer modes.
HP 16C Vintage RPN Programmer Calculator – Tested Working – Case & Manual
$208.64est. delivered
Titled tested and working with new batteries and a case, so it should run out of the box at $209 delivered.
Hewlett Packard HP 16C Scientific Calculator w/Case Tested & Works New Batteries
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$106.33est. delivered
$99.99 + $6.34 shipping
Buy It Now$99.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
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Good buy
Titled works but with LCD bleed, so read the description. With a case.
Seller: wonder_trove
100% positive
Used$136.96est. delivered
$129.87 + $7.09 shipping
Buy It Now$129.87
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled tested and works, with a case. Photo shows the display off.
Seller: coe092
100% positive
Used$196.85est. delivered
$189.95 + $6.90 shipping
Buy It Now$189.95
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled tested working, with case and manual. Photo shows the display lit.
Seller: trueopus
100% positive
Used$208.64est. delivered
$199.99 + $8.65 shipping
Buy It Now$199.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled tested and works, with a case and new batteries.
Seller: methodorg14
99.5% positive
Used$195.36est. delivered
$184.00 + $11.36 shipping
Buy It Now$184.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled with a pouch and new batteries, no test claim. Photo shows the display lit.
Seller: mortimerwow
99.9% positive
Used$192.05est. delivered
$179.95 + $12.10 shipping
Buy It Now$179.95
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Same title and price as youfind's listing. Ask for photos of this unit and its serial label.
Seller: defactomark09
99.3% positive
Used$192.05est. delivered
$179.95 + $12.10 shipping
Buy It Now$179.95
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Same title and price as defactomark09's listing. Ask for photos of this unit and its serial label.
Seller: youfind
99% positive
Used$633.99delivered
$633.99 · free shipping
Buy It Now$633.99
Priced high
Ships from Japan with no test claim, at about 3.2 times the median.
Seller: koma2_jp
100% positive
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