Xau/usd pips calculations?

Beginner Questions
1

Hello,

Would somebody please tell me :-

  1. what are the lots equivalent to ,in the XAU-USD trades.

I mean for the EUR/USD 0.1 lot = 10000 and 1 pip = $ 1 , what is it for the XAU/USD?

  1. Also, How are the pips calculated? I mean with the EUR/USD we have the last 4 or 5 digits depending on the broker. However, what is it for the XAU/USD?

Thank you.