Hi all,I'm new in XML and also strings is not my best in XML gauges.I found some code that shows the total fuel that was used, butit's not exactly what i want.Can anyone help how to change this string to show fuel burned inKilograms, and only one tank (left, or Right) ?Thanks for any help, i just stack with this gauge.%((G:Var2) (A:fuel total quantity weight, pounds) near - (G:Var1) *)%!04s!I look for XML tutorials but the only one i found was www.fs2x.comtutorials but there is no much explanation about strings and howto use integers. Is there any real good tutorial about using FSstrings and variables ?Thanks againMax .M

Try:-%((G:Var2) (A:fuel left quantity,gallons) 2.72 * near - (G:Var1) *)%!04s!Get the ' 2.72 ' weight per gallon factor from the *.air file item No 312 which is in pounds and convert it to Kgs.Regards, Ted.

Thanks,Max .M

Or you can try this:(%((A:FUEL LEFT QUANTITY, meter cubed) (A:FUEL WEIGHT PER GALLON, kilogram per cubic meter) *)%!d! kgs)Douglas