Hopefully these links will help you...
To get your MPG from kilometers - handy for imported Japanese cars.
https://www.torquecars.com/tools/uk-mpg-from-km.php
Or in Europe you use litres per 100km and this little calc will work it out
https://www.torquecars.com/tools/litre-100km.php
However if you want something different I'm happy to create it for you. That's how our many tools and calculators came into existence.
Also a big thanks for your support and for joining the site.