How much to mail a postcard?

Does anyone know how much it costs to mail a standard size postcard to the US?  It's been so long I can't remember, and I can't seem to find any postcard rates on the Royal Mail website.

I thought postcards were the same rate as a standard letter or card in an envelope.

If you send a postcard within the UK, you just put a 1st or 2nd class stamp on it, so I would imagine that sending a postcard to the US would be the same price as sending a letter to the US.

Hmm. I don't think it is as much as a card in an envelope, because I do send a lot of cards and they are a bit expensive. I seem to remember a postcard being under 1 pound, but not sure. I think they'd be even lighter than a letter.

Thanks for the reply. I guess I'll just pop in the post office next time I'm in town.

Postcards are 88p.    As long as it's under 10g, anything is 88p.  

I've got the pdf of Royal Mail prices saved on my computer.    It's been very handy sending parcels.  

http://www.royalmail.com/sites/default/files/RM_Our_Prices_OCt2013.pdf

Thank you! Great link, thanks for that as well!