Roman Calculator 4+

John Millhouse

Designed for iPad

    • 5.0 • 2 Ratings
    • $0.99



Roman Calculator is a full function calculator and the first to calculate roman fractions. Choose from four backgrounds including your image library and four button style. Styles are selectable in settings or can be set with a swipe. The result of all calculations will be displayed as a roman number. Tap the Convert button to convert Roman to Arabic and visa versa. In landscape mode, both roman numbers and arabic numbers are displayed. Landscape mode also adds more functions. The functions include sin, cos, tan, square root, inverse, memory and more.

What’s New

Version 17.1

Removed background from top safe area to view text better in settings page.
Updated photo picker to SwiftUI

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

Rtlowell ,


A totally awesome/pointless app-but it is so much fun. (It's right up there with the virtual slide-rule apps) So now you can figure out those movie copyright dates on old movies and calculate how many years had elapsed between releases. Essential if you eschew all things Arabic. Impress your friends when you split a dinner check, "oh, you don't understand Roman Numerals......?"

110 Bones ,

My main calculator app

I don't understand the negative comment. I use the Roman Calc all the time and never had a crash. My background and button styles stay set from launch to launch.

Wa2116473 ,

Fun!! Fun!! Fun!!

This is not only a BLAST! But truly simple and useful. I really don't take the time to write comments, but this was just too good to let pass without letting others know about it.

App Privacy

The developer, John Millhouse, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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