somewhere to calculate the amount of coins/day with my own hash power?
You need to know difficulty. You can get it here
https://minerpool.net/pools/victorium/, for example.
Coins/day = YourHashRate / Difficulty * 3600 * 24 * 6,25
Now 100 mh/s gives to you 42,1875 coins per day.
no ... you would get way less