HP 35s Scientific Calculator


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UPC: 883585142859   Part: F2215AA#ABA


  • Get professional performance from HP’s ultimate RPN scientific programmable calculator—ideal for engineers, surveyors, college students, scientists and medical professionals. Scientific projects require accuracy, functionality and dependability for success. The HP 35s scientific programmable calculator delivers them—and more—with features that include 30KB user memory, your choice of RPN and algebraic entry-system logic, a convenient two-line display, and the time-saving HP Solve application.



  • RPN or algebraic entry-system logic, keystroke programming, HP Solve and 100 built-in functions, Large 2-line display with adjustable contrast, Single and two-variable statistics, linear regression and more, 30 KB of memory plus 800+ independent storage registers, Fraction mode plus fraction-to-decimal conversion, 42 built-in physical constants, plus a complete library of unit conversions, inverse functions, cube root, logarithms, exponents, factorials and more

Ideal for

  • Ideal for engineers, surveyors, college students, scientists and medical professionals.

Permitted for use on

  • Permitted for use on SAT Reasoning Test, SAT Subject Tests in Mathematics Level 1 and Level 2, ACT Mathematics Test, PSAT/NMSQT, AP Chemistry/Physics, PLAN, and EXPLORE.

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Internal specs

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Best used for

  • Engineering; Surveying; Science; Medicine

Permission usage

  • SAT Reasoning Test; SAT Subject Tests in Mathematics Level 1 and Level 2; ACT; PSAT/NMSQT; AP Chemistry/Physics; PLAN; EXPLORE

Built-in functions

  • Over 100

Memory registers

  • 800

Memory, standard

  • 30 KB


  • 2 x CR2032 batteries; battery life: 0.73 year @ 1 hr/day (approximately 9 months)

Power off memory protection

  • Yes

Auto power off

  • 10 minutes

External specs

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  • Adjustable contrast with 2 lines x 14 characters + indicators, 14 character dot matrix (5 x 7)

Display type

  • LCD

Dimensions (W x D x H)

  • 8.2 x 1.82 x 15.8 cm

  • 3.23 x 0.72 x 6.22 in


  • 125 g

  • 1 year warranty (may vary by region)

What's in the box

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  • Calculator, batteries, user manual, premium protective case

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Customer ratings and reviews for HP 35s Scientific Calculator

Rated 1 out of 5 by HATE IT!!!! I am a mechanical engineer and had used a HP20 for the past 18 years or so and loved it. When it passed away, I bought the HP35S thinking it would be probably better. I loved it until I tried to do the most basic thing. I never drank the cool-aid regarding RPN and have managed to live productively for 53 years using algebraic entry. The HP35S offers both but that is the rub. In algebraic mode, the P.O.S. can't do the simple task of adding say 3 percent to 4 x 6. My flip phone can do it for God's sake. It takes 2 or 3 extra keystrokes to do the above. Another example, Say I calculate 5 x 9 which is 45. Now I want to change the answer to -45 using the +/- key. No can do. You will get a syntax error. Like I said, I HATE IT!!! August 8, 2013
Rated 1 out of 5 by WHAT A DOWNGRADE I have been using a hp 32s rpn calculator for 22 years. Now I am stuck running this (35s) replacement, and it is a nightmare. Some genius desided to move all the buttons around, and worse yet the 35s no longer has the polar/recatngular convertion funtion that I used on a daily basis. If you never used a previous version this is probably an ok calculator April 23, 2013
Rated 1 out of 5 by Don't waste your time and money I have 2 hp33s that I use everyday to help day to day land surveying. I used them so much the buttons started falling off. I then bought this hp35s which was the replacement. What a waste of money! It doesn't have the right functions to calculate and store traverses like the hp33. Also, the ALG mode doesn't flow. It is now a paperwieght and probably going to be a frustration target. April 10, 2013
Rated 4 out of 5 by A good, useful calculator for engineers The HP35S is very light and the keyboard has a nice feel. It is somewhat cryptic to program but does have the solver functionality. Not quite as nice as the HP42S which is the gold standard for engineering calculators, in my opinion. March 3, 2013
Rated 5 out of 5 by Love RPN, Hex mode could be better It's rather annoying that when in Hex mode, entered numbers still default to decimal. Entered numbers should default to the current radix mode. January 30, 2013
Rated 5 out of 5 by Excellent product! I have owned over a dozen HP calculators starting with the HP-35. The 35s and the 45 were/are the best of the lot. January 19, 2013
  • 2015-04-20T09:05:22.028-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-2, bvpage2n
  • co-hasreviews, tv_103, tr_103
  • loc_en_US, sid_F2215AA_BVEP_ABA, prod, sort_default

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Owner support

Warranty information

This product is covered by the standard HP warranty

Support information

Support for this product is provided by HP Customer Care

Returns & exchange information

The HP Home & Home Office Store will accept returns or exchanges for this product up to 21 days after delivery

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