Grenades and other explosive powers have the Area modifier applied to them.
When determining the range do you use the distance column or the volume column in the ranks and measures table?
[RPG] How to figure the blast radius of an effect in Mutants & Masterminds
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Best Answer
The metric is Distance for 5 of the effects as per the Area modifier description. Shapeable is the outlier, being based on Volume rank (although there are a fair number of people who feel that it's either not useful enough or too useful depending on your interpretation of 30 cubic feet of volume and how much of it has to intersect targets). And, of course, Perception is based on who can perceive you, so there is no strict rank.