Absolutely not possible to such a thing to exist for TRT dosages (under 250mg\week), based on observation.
The resultant blood levels wildly differ from person to person for a given dose. Example, go thru this forum and you will see 200mg\week gets some to 800ng\dl and some people to 2000+ ng\dl.
On the other hand there are kind of accurate calculators\charts for Free T levels, if you input SHBG, total T (measured, not the amount injected) and possibly albumin.
Would be interesting to know if the above applies to pharma level doses as well, or if a rough chart can be plotted.
There is a user on the forum who created a chart to estimate TT levels given T dose, SHBG, etc. you need known data points first, and he hasn’t given the formula out
Have run 2 cycles using 250mg test e a week and blood work shows total t around 2100.
An interesting note is in the first cycle I used no AI and my free t was double the normal range, ran an AI on second cycle and my free t shot up to 10 times the normal range.
Also, using UGL test makes the results even more unreliable as UGL test could be underdosed or overdosed.