So in the end, the default mining power is 1.

Without any tools, the formula is the same with the power as 1.

Everything is clear now !

Hm I feel dumb x)

I just found the formula...

It's quite the same, except the results is in ticks, not in seconds like with mining-drills for some reason.
So you just need to divide by 60 (60 ticks in 1 seconds) to have the time in seconds.

I've made some test with a custom mods by setting values ...

Yea I didn't find anything that can be usefull for tool calculation, except the amount mined by tick, but that doesn't seems to work.

Here's my values. If someone can help me find the formula for the tools that would be awesome :D

I've also found how durability is used with tools, it seems that ...

Yes but what is the formula ? (if there is one)
I don't understand what you mean :/

Hello,

I'm looking for the formula of harvesting time.

I saw on the wiki the one for drills, it works perfectly, thanks for that :)

The main thing with player and/or tools harvesting is that they have one value but not the other... (I talk about Mining Power and Mining Speed, that both drills ...