just tell them how much you are getting in US, most often than not, these institutions will do their best to offer you just as much, if they want you badly.

once they have given you your offer, do the math. don't count the allowances, they are take-home pay. study your currency fluctuation forecasts and take that into consideration. if you have kids on school age, check first if the good schools here have slots for your kids. and make sure that although they would likely give school assistance, that it would be substantial enough to cover for your kids tuition fees.

good luck. keep posting.