Three (Rule of 3 Calculator) vs Finance Charge Calculator Usage & Stats
For example:
If my car consumes an average 8.8 litres of gas per 100 kilometers, a 350 kilometer trip will consume 30.8 litres (and therefore $61.6 if gas price is $2/litre)...
...or a fast currency converter: if 1 Euro is about 1.09 US dollars, 33.9 EUR is 36,92 USD.
Three can also be used for measurements, image sizes, grocery shopping and more.
As simple and trivial it is, the rule is used daily in practical arithmetics.
The application has a simple and modern interface to perform fast calculations and includes some basic options to facilitate the displaying results (thousands separator, decimal digits) including color customization in dark/light modes.
- Apple App Store
- Free
- Utilities
Store Rank
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The finance charge represents the cost of credit or the cost of borrowing. It includes not only interest but also some other financial transactions. We can observe it through the individual budget and creditors' and lenders' budgets. In an individual budget, the cash benefit can be viewed basically as the amount of money paid to acquire cash, while the premium is the amount paid.
- Apple App Store
- Free
- Utilities
Store Rank
- -
Three (Rule of 3 Calculator) VS. 
Finance Charge CalculatorJanuary 12, 2026