

Looking at [Hayate's](http://nanoha.wikia.com/wiki/Hayate_Yagami#Spells) and
[Nanoha's](http://nanoha.wikia.com/wiki/Nanoha#Spells) spells, some of them
are given a rank. For instance, Nanoha's [Starlight
Breaker](http://nanoha.wikia.com/wiki/Starlight_Breaker) is ranked S along
with [Blast Calamity](http://nanoha.wikia.com/wiki/Blast_Calamity) and
Hayate's [Ragnarok](http://nanoha.wikia.com/wiki/Ragnar%C3%B6k), while
Hayate's (or Reinforce's to be exact) [Diabolic
Emission](http://nanoha.wikia.com/wiki/Diabolic_Emission) is ranked S-

While there is information on [Ranks](http://nanoha.wikia.com/wiki/Rank),
these seem to only refer to the TSAB's internal Mage Ranking and not how they
relate to spells.

I am wondering if the Spell Ranks have any numerical equivalent to them –
something similar to [The Nasuverse
Rankings](http://typemoon.wikia.com/wiki/Rank) (in which B = 40, A = 50, and
the power after appending +'s is (Rank Value + (Rank Value x No. of +'s)), so
A++ = 150).


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nanoha
Do Spell Ranks have any numerical equivalent?


There are no such numeric formulae; at least, not in the official materials.
Numeric rankings are rarely mentioned in the show; one of the rare such
examples occurs in an episode of the original series, where Nanoha's magic
power is estimated as 1.27 million, while Fate's is 1.43 million. (They were
both of AAA rank at the time.) "Plus" and "minus" are not modifiers that can
be applied multiple times to a rank, either; "A+" is simply a rank higher than
"A" and lower than "AA-".

Mage ranks are qualitative; they do not just measure amount of magic power,
but also skill. They are usually granted by a test by TSAB; when this is not
possible, i.e. in case of antagonists, they can be estimated. A spell rank
presumedly signifies the rank of a mage who should be able to cast the spell,
but this isn't a hard and fast rule: "Eternal Coffin" is a S+ rank spell, but
Chrono (ranked AAA+) was able to use it thanks to his device's specialization
for freezing magic; for another example, Teana (ranked B at the time) was able
to use an AA-rank technique during a training to combine her projectiles with
a barrier in order to protect them from an anti-magic field.


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answer