HP Calculators Timeline » HP 11C

HP 11c

The HP 11c is a programmable calculator with an extensive set of built-in scientific and engineering functions.

Non-Programmable Features:

  • Hyperbolic and inverse hyperbolic trig functions.
  • Probability (combinations and permutations).
  • Factorial, % change, and absolute value.

Programming Features:

The HP 11c provided label addressing (0-9 and A-E), subroutines (nestable to 4 deep). 8 conditional tests, increment/decrement loops, and 2 flags. For program editing, the calculator featured implied insert (instructions entered didn’t overwrite the current instruction) and deletion via the backspace key.


Introduced in 1981. Discontinued in 1989.

Current Stock Status: Out of Stock

Replacement Model: HP 33s

Updated On: 13.09.15

  1. On 15-May-2019, Anonymous wrote: 
    Hi How to get rid of the 0.0000 00 set-up ?
    Your reply to Anonymous

  2. On 30-Sep-2018, Bill wrote: 
    I have an HP11C bit it has furlongs , time, lengths under program 1
    Your reply to Bill

  3. On 22-Oct-2016, Anonymous wrote: 
    What are the batteries for this HP 11C ?
    Your reply to Anonymous

  4. On 12-Sep-2014, Dick wrote: 
    I must have done something stupid and now my calculator is displaying in scientific notation instead of standard notation. How do I get back to standard notation?" thanks in advance for any help
    Your reply to Dick
    • On 10-Jan-2015, Anonymous replied: 
      You can download an Owners Handbook here: h10032.www1.hp.com/ctg/Manual/c00503576.pdf Section 4 - Display Control, starting on page 67, will answer your question.
      Your reply to Anonymous

  5. On 22-Feb-2013, Kelly wrote: 
    I have 11C stuck in 0,00 user and need to get it back to decimal 0.00 mode - please help
    Your reply to Kelly
    • On 24-Sep-2013, Anonymous replied: 
      to set to 0.00 (with dot instead of comma 0,00) turn it on while keeping "." key pressed... the same again to get back to ","
      Your reply to Anonymous

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