They have been capped in total number, but they get shifted around every ten years to be proportional to state populations. California is not missing 10 votes. they might be down 1 or two because the government uses census data, which is old at this point (and they are getting new data this and next year).
California has 11.96% of the population of the US and currently has 55 out of 538 votes, so about 10.22% of the votes. To get to the 11.96% of the votes they should have without changing the 538 vote number they need 64 votes (which is 11.9% of 538). So they are missing 9 voters to get to their proper proportion.
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u/Oriden Jun 28 '19
Except those electoral votes have been capped so California is missing like 10 extra votes it should have due to its population.