Quantize Panel range setting

In the quantze panel (Slice Rules area) why is the range in ms? And how can I translate ms to the project grid? If I use the seconds grid setting, I would have to expand that out quite a bit for an accurate reference right?

This is the amount before the transient/hitpoint that the slice is made…only applies to mutitrack editing.

All quantise will still happen to the bars/beats grid…but the start of the events will be 30ms (or whatever is set) in advance of the quantise point so that you don’t cut the transients.