*This is not real exchange rates.

When doing exchange rate calculations, and I have only the rate for USD to GBP. can we find the rate for GBP to USD?

let say I have $100 USD to GBP= 0.27 GBP to USD= ??

1 Answer 1


Just take the reciprocal.

1/0.27 = 3.704

  • Why downvote? Math is correct is it not?
    – ssn
    Aug 21, 2017 at 20:42
  • 2
    Your math is fine. I wonder if someone's expecting a more complicated answer to a simple question.
    – D Stanley
    Aug 21, 2017 at 20:57
  • yeah, not sure what's going on, question and answer are both on-topic. There's not much more to be said.
    – Rocky
    Aug 21, 2017 at 21:54
  • 1
    My guess (though I didn't downvote) is that no one's mentioned the difference between the buy, sell and mid-market rates. If the OP's rate was the mid-market rate, the above figure will be the correct reverse mid-market rate; if the OP's rate is the buy-price for GBP, then the sell price will be different from the above figure.
    – TripeHound
    Aug 22, 2017 at 6:58
  • 1
    @TripeHound - no offense taken; just wanted to make it clear to other readers how I was thinking ;-)
    – ssn
    Aug 22, 2017 at 11:40

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