HP 30b

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HP 30b
HP 30b
Type Financial
Manufacturer Hewlett-Packard
Introduced 2010
Discontinued 2014
Latest firmware 2010-04-05
Predecessor HP 20b
Cost USD 20 - 50
Entry mode RPN, Algebraic, Chain
Display type LCD Seven-segment display dot-matrix display
Display size 12+3 digits and 8 characters
Processor 30 MHz Atmel AT91SAM7L128 (ARM7TDMI core)
Memory register 50 data and 10 registers
Program steps 290 bytes
Power supply 2 x CR2032 batteries (1 required, 1 optional)
Power consumption 0.25 mW
Weight 115 g
Dimensions 77 x 149 x 16 mm

HP 30b (NW238AA) is a programmable[1] financial calculator from HP which was released on 7 January 2010.[2] The HP 30b is an advanced version of the HP's prior model HP 20b. Featuring a two line alpha numeric display, ability to input data via Reverse Polish Notation, Algebraic and normal Chain algebraic methods, and twelve digit display .

This ARM powered calculator also has some limited scientific functions which is relatively rare in financial calculators. Also, it has a built in Black-Scholes Equation,[3] for calculating theoretical premium for calls and puts, Modified Internal Rate of Return and Financial Management Rate of Return, a first.

It is one of the fastest calculators available, even faster than HP's flagship model 50g under normal usage conditions because the 30b runs native ARM code while the 50g emulates Saturn code even though it executes at 75 MHz. The 30b is also acclaimed by users for its improved rotate-and-click keys than the much criticized keys on HP 20b.[citation needed]

As of now HP 30b is not allowed in any major exam like CFA Charter exam.

WP 31S and WP 34S[edit]

HP 30b with overlay for WP 34S

As with the HP 20b, the HP 30b's firmware can be overwritten ("flashed") using a computer and a special cable. Taking advantage of this facility, a team of HP calculator enthusiasts has produced a firmware for converting the 30b into a programmable scientific calculator.[4] The resulting WP 34S firmware and user's manual can be downloaded for free[5] and a special serial cable and keypad overlay can be purchased for a nominal fee.[6] The WP 34S is also being sold commercially.[7] The WP 31S is a stripped-down version of the WP 34S.