You can use the COLX Staking calculator here:

https://calculator.colossusxt.io/staking

#### The formula:

T = the Total number of COLX currently staked. Current number is 2.24 billion (June 26th 2018)

P = your Personal number of COLX staked.

1440 = The number of blocks in a day

T / (P * 1440) = your average number of days per reward