See
here.
PayPal won't charge you to send the money.
Credit card forex charges may apply as normal.
PayPal may charge the recipient for withdrawing the money depending on the amount and their account status (personal or permier/business).
Update: actually looks like there are no charges for withdrawal of US$ to a
US bank account and the minimum withdrawal is US$10.
Update 2: looks like
PayPal charge a 2.5% forex margin on multiple currency transactions (e.g. sending from an
Irish/€ account to a
US/US$ account) but I'm not sure if these are instead of or in addition to credit card forex margins which would normally be 1.75% or more...!