This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.
Rule of Three Calculator by Saran Dumronggittigule


16+ similar apps compared and reviewed
Percentage is great, but it's not the only option. Explore 16+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.


This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.



This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.






Easily determine the capacity of structural steel beams and columns. Get detailed calculation sheets to verify your work, designed according to AISC 360-16 standards. Features intuitive touch-based interaction and built-in material databases.




This automotive calculator provides quick computations for over 45 formulas across various vehicle systems. It supports both U.S. and metric units, making it a versatile tool for mechanics, technicians, and enthusiasts.


Easily convert volume measurements between 18 different units. Simply input your value and select the desired units for instant conversion. Supports a wide range of common and specialized volume measurements.


Manage trucking jobs, track earnings, and digitize tickets. Report accidents, view payment details, and access quick map routes. Receive instant dispatch notifications and scan tickets automatically.

