RealCalc Scientific Calculator

189K reviews
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About this app

RealCalc Scientific Calculator is one of Android's most popular scientific calculators. It has over 20 million downloads and more than 100,000 5* reviews.

RealCalc is designed to look and operate exactly like a real hand-held calculator. It has all the standard scientific functions plus history, memories, unit conversions and constants. You can choose from a number of display styles and formats. It also supports binary, octal and hexadecimal calculations and has an optional RPN mode. RealCalc is easy to use, but has full help included in the app.

If you like RealCalc, the pro version RealCalc Plus has lots of extra features including fractions, degrees/minutes/seconds, customizable conversions and constants, landscape mode, a home-screen widget, a 12-digit display and greater internal precision. Purchasing RealCalc Plus will also help to support further development. Just search for RealCalc Plus or follow the upgrade link in the app.

RealCalc Scientific Calculator 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

RealCalc Plus contains all these features, plus:
* Fraction calculations and conversion to/from decimal
* Degrees/minutes/seconds calculations and conversion
* Landscape mode
* Homescreen widget (now with RPN support)
* 12-digit display
* Extended internal precision (32-digit)
* User-customizable unit conversions and constants
* New RPN styles (buffered-entry, XYZT rolling stack)
* Multi-window support with drag & drop.
Updated on
Oct 23, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

180K reviews
A Google user
October 6, 2018
Best calculator I've used and I've tried a few. I was lucky to find this one early and have never wanted it to have a function it doesn't have. I'm a little surprised that I haven't needed a graphing function in that time (several years) but I also have had my trusty, old TI-83 Plus handy and would always rather use that than a phone app (for graphing). Anyway. Never had a problem with this app. Will buy the paid version when I've built up enough Play Store credit.
161 people found this review helpful
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David F
February 2, 2023
Really like this calculator. One issue that has me happy to still have a physical calculator is that sometimes I miss key presses if my finger slides before releasing, yet the haptic feedback still occurs (on the initial touch). One thing my Casio has that I miss here is full formula display as entered so can confirm correct entry and edit or use variables to query each time to easily recalc for different values. Of course by then I'm maybe using a spreadsheet.
80 people found this review helpful
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David Chien
January 30, 2022
A good scientific calculator. PROS: Much like a real Sharp/Casio, easy to use. All the basic features work, passing the crucial calculator tests (such as 1/9=ans/9....*9*9=1). Can paste copied numbers for use. Simple constant/conversion sub-menus, easy to find, use. CONS: ONLY 10 digits-can't enter the $29 trillion US debt to the dollar - developer said it won't be added. No multiline history display, 1-line. No fractions and hours. 3^97 mod 353 = fails (40). IMO, Champ, CalcTastic, then Real.
100 people found this review helpful
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What's new

* Updated for Android 13.
* Constants updated to latest NIST values.
* Added redo-last-conversion feature (RealCalc Plus only).
* Added option to include labels in clipboard copy.
* Added ability to resize and reposition layout on devices with large screens or unusual aspect ratios: go to Menu > Resize (RealCalc Plus only).
* Fixed some UI issues and crashes.
* Added monochrome app icon for themed icon support.