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Developer: Quartic Software

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Calculator right there without looking for the app.

PRODUCTIVITY For Engineering Calculators

Android's #1 Scientific Calculator. A fully featured scientific calculator which looks and operates like the real thing.
Looking for fractions? Degrees/minutes/seconds? Landscape mode? You need RealCalc Plus. See elsewhere on this page for the link, or select 'Upgrade' from the RealCalc menu.

RealCalc includes the following features:
* Traditional algebraic or RPN operation
* Unit conversions
* Physical constants table
* Percentages
* Result history
* 10 memories
* Binary, octal, and hexadecimal (can be enabled in Settings)
* Trig functions in degrees, radians or grads
* Scientific, engineering and fixed-point display modes
* 7-segment, dot-matrix or standard font display
* Configurable digit grouping and decimal point
* External keyboard support
* Full built-in help
* A complete lack of advertising

RealCalc Plus contains all these features, plus:
* Fraction calculations and conversion to/from decimal
* Degrees/minutes/seconds calculations and conversion
* Landscape mode
* 12-digit display
* Extended internal precision (32-digit)
* User-customizable unit conversions
* User-customizable constants
* New RPN styles (buffered-entry, XYZT rolling stack)
* Samsung multi-window support with drag & drop.

If you find RealCalc useful, please consider purchasing RealCalc Plus to support further development. Thank you.

* If you want data size conversions in multiples of 1024, use kibibytes, mebibytes, gibibytes, etc - see

* If you can't find HEX, BIN or OCT modes, go to Menu > Settings and make sure that 'Radix Modes' is checked.

* If the percent key appears to give wrong answers, make sure you are pressing '=' at the end, e.g. '25 + 10 % =' will give 27.5.

* If sin/cos/tan functions don't give the answer you are expecting, make sure you are in the correct angle mode. Degrees, radians and grads are supported, indicated by DEG, RAD, GRAD in the display. Use the DRG key to change mode.

* If any of the digit keys are disabled, or the decimal point doesn't work, or you have answers with letters in, or basic arithmetic appears to be wrong, then you are in binary, octal or hexadecimal mode. Press DEC to return to decimal operation. If you don't need these modes, please make sure that 'Radix Modes' is disabled in the settings.

Please read the help for more information.

Size: 561k; Requires Android : 3 and up. .apk

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Best Android Apps

  • Best of its Kind
  • Easy to Use
  • Does What it Says
  • Fast & Responsive
  • Many Features
  • Great app
  • I Use It Daily
  • Much better than the stock one!
  • Useful
  • Es una calculadora muy completa
  • Really scientific.
«Its better than stock calculator. Faster, more features and the most important is, its free!!» by Hisyamzcom
«No graphing function» by Ivan
«Great work» by CoolBoyGrant
«Fast and comprehensive»
«Keeps me from buying the exspensive version.» by Brooklyn
«Fantastic & most useful.»
«Really nice for me because I'm in school and I don't have to go buy a calculator now. Yay!» by Tatiana
«Great widget!» by Uboy
«I need it for computation»
«Simply great!»
«Come la mia 12c....» by Griphyus
«Very complete and useful» by Kxuk
«Easy, fast and a lot of options» by Macarenaman
«Gran aplicación, solo falta la conversión a grados.»
«It works well so far»
«Best calculator» by Thesquid
«It really helps you!»
«If it doesn't have it, you don't need it.» by Jesse
«Beats the default android calc hands down.» by Iszzydizzy
«The best calculator app there is.» by Synaptyx
«Very helpful very helpful tool a great asset to me»
«Better than the regular season calculator» by Oreoliz
«Wanted RPN would like it to be programable as i use area of circle»
«best of the best» by Zegapain
«The best calculator!» by Dom
«nice, nice»
«Easy to usr» by Jon
«It's Very good and usefull SW» by Redfalcon
«Convenience & ease of use.» by Rob
«When you're used to RPN, nothing beats it»
«Ottima calcolatrice» by Blue66
«Fantastic app»
«Clean and nice to use» by Fab
«Good solid calc»
«Very good one»
«La meilleure»
«Experience key» by Bolt
«Though it has got all the features .but still its a bit complex, a tutorial should have been bundled» by Ank08
«excellent app»
«Works like the original.» by Tjs2
«I've used HP calculators for 35 years and this app does the brand justice. RPN logic rocks.»
«Excellemt app»
«Good application»
«This app can help me to make my work more easy..»
«Way better than stock calc»
«it doesnt have complicated functions» by Mario
«Best tool for use»
«Vary helpful» by Antlovessonia9289
«Facil de usar»
«Great calc»
«Ottimo x scolare» by Joshua