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Why I built a money calculator.

3 min read

Standard calculators aren't specifically designed for money. A small display change has been useful in my clinical work.

I started thinking about money skills when working with my clients. Many found it hard when it came to adding and subtracting amounts. That's usually where calculators come in handy.

But I noticed something that kept causing confusion.

Standard calculators are not designed in a way that makes money easy to understand. For example, if you type in 1.60 + 1.50, the result shows 3.1. Technically that is correct, but when you are working with money it does not feel clear at all. It can easily be misread as three dollars and one cent, when it is actually three dollars and ten cents. I completely understand how this becomes misleading, especially for someone still building confidence with numbers and understanding money.

This made me realise that the calculator tool itself was the problem.

I wanted something that would help people quickly and confidently calculate totals of what they are spending and be able to work out how much change they should receive. In practical terms, it is also about supporting greater independence with money and building confidence in everyday use.

That is where the idea for a money calculator came in.

There are no confusing disappearing zeros. Dollars and cents are clearly separated with visual cues. The + and - buttons simply have reminders for what each one is for. It also includes helpful functions like splitting amounts into halves, quarters or thirds, which is useful in real life situations like sharing costs between roommates or friends.

One of the most rewarding parts of this process has been watching clients who had previously struggled with a standard calculator start to grasp it. That shift in confidence and clarity is what makes this work feel meaningful.

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