Exchange rates/conversion fees when using Paypal debit card to purchase overseas via phone, website

[jesse76]

How can I reliably  predict what an item will cost me if I use my Paypal debit card to order a product over the phone from UK?

xe says exchange rate is 1.49xxx GBP to USD.  The exchange rate according to paypal for sending money to another paypal user is 1 GBP = $1.54...what accounts for the difference in rates and is this the same rate I would use when calculating how much a purchase overseas in GBP will wind up costing me in USD?

Be nice if I know before I pay.

[surplusdealdude]

Use the Paypal rate, it's the one that will apply.

Paypal makes a profit from exchange.