What is 1 TA value in 5G?

Hi ALl.

What is 1 TA value in 5G?

Hi,
If you use 15KHz numerology like LTE, then the TA in NR is equal to LTE (*conditions apply in terms of offset parameter). Else, higher numerologies reduce the distance to TA mapping.
You may try below resources.

Timing Advance [This is a good website in case you want to read theory in details]
5G Distance from TA Calculator [This allows you to calculate for TA to distance scenarios.]