Currency Converter
The Currency Converter changes an amount from one currency into another using an exchange rate you enter, so it works instantly and privately without calling any external service. Enter the amount and the rate to see the converted value and the reverse rate.
How currency conversion works
Converting money means multiplying an amount by the exchange rate between two currencies. If one unit of your currency buys a certain amount of another, then any sum simply scales by that same rate. Because rates move constantly, the key is to use a current figure.
The formula
Converted amount = Amount × Exchange rate. To go the other way, divide instead of multiply, or use the reverse rate, which is 1 ÷ Exchange rate.
A worked example
You have 100 units and the rate is 1 to 83.2. The converted amount is 100 × 83.2 = 8,320. The reverse rate is 1 ÷ 83.2 = 0.01202, so 8,320 converts back to 100. Always confirm which direction the rate is quoted in, since getting it upside down is the most common mistake.
Getting an accurate rate
This tool keeps your data private by never contacting a server, which means you supply the rate yourself. Look up the current mid-market rate from a reliable source and enter it. Remember that banks and money changers add a margin, so the rate you actually receive when exchanging cash or paying by card is usually a little worse than the mid-market figure.
How to use
- Enter your details in the fields above. The Currency Converter accepts everyday values and checks them as you type.
- Press the action button (or just start typing for live tools) to run the calculation.
- Read your result, along with any supporting figures, in the clearly labelled result box.
- Use Copy result to grab the answer, Reset to start again, or Copy link to share this tool.
Why use this tool
Finance Wave built the Currency Converter to be genuinely useful: it validates your input so you never see a broken result, formats numbers for your region automatically, and stays readable in both light and dark mode. Because everything happens on your device, it is private by design and keeps working even without an internet connection once the page has loaded.