DeathBrewer's numbers are a good place to start. Remember that they only apply to the base grains (2-row, Pilsner, etc). You don't change the specialty grains.
When I convert an AG recipe, I add up all specialty grains and use at least an equal weight of base grain.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
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