There are several free online currency conversion calculators available, here are a few options:
XE Currency Converter - this is a popular currency conversion website that provides real-time exchange rates and allows you to convert one currency to another. The website is free to use and offers a range of tools and services related to currency conversion.
Google Currency Converter - Google has a built-in currency converter that you can access by simply typing in a currency conversion query in the search bar. For example, you can type "100 USD to EUR" to get the equivalent amount in euros.
Yahoo Finance Currency Converter - Yahoo Finance also offers a free currency conversion calculator that allows you to convert one currency to another. You can access it by going to the Yahoo Finance website and searching for "currency converter".
Oanda Currency Converter - Oanda is another popular currency conversion website that provides real-time exchange rates and allows you to convert one currency to another. The website is free to use and offers a range of tools and services related to currency conversion.
All of these options offer reliable and accurate currency conversion calculators that you can use for free.