Tbh I always found the conservative estimates of clone numbers (2 to 3 million) to be totally inadequate and too small when we talk individual clones. There are more than 3 million PLANETS involved with hundreds of fronts and battles taking place simultaneously, not to mention that on Venators and Acclamators only the commanding officers were non-clones. If the 2 to 3 million thus mean individual soldiers there wouldn’t be enough to man both all the warships and the ground forces.

padawanlost:

Same. Fortunately,
the old EU rectified that mistake and now the 3 millions clones were only the
first “batch”. Adding to what you already mentioned, It makes no sense to have
only 3 millions clone to fight billions of droids for 3 years. That’s just bad
math. Even I know this will end badly lol

The first two hundred
thousand Grand Army clones were collected from Kamino by the Jedi Grand Master
Yoda, who raced to Geonosis to confront Dooku and the leaders of the newborn
Confederacy of Independent Systems. Another
wave of a million clones was ready soon after that, part of Sifo-Dyas’s initial
order of three million.
[Star Wars: The Essential Guide To Warfare by
Jason Fry]

 […] created
a number of droid models designed to wage war against the Republic. B1 battle
droids, droidekas, and starfighters known as vulture droids first saw action in
the invasion of Naboo in 32 BBY; a decade later, the Clone Wars would see billions upon billions of droids battle the
Republic’s armies from one side of the galaxy to the other.
[Star Wars:
The Essential Guide To Warfare by Jason Fry]

 I mean, I’m with the
fans who believe the real number was somewhere between 11 billions and 1
trillion.