Made because there was no easy way to visualise your potential Nectar earnings.
Any suggestions, post to GitHub.
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Nectar Points
Avios
Enter the number of Avios you are intending to convert to Nectar.Amex Membership Rewards
Assumed rate of 1 MR = 1 Avio then converted to Nectar.Result
You will have
£0.00
To spend at ebay / Argos / Sainsbury's