Here you find some Reciprocity tables for the most used Films. (others may follow)
I took the data from the original data sheets of the Film or collected them on other places on the internet.

What is Reciprocity and why do u need this table?

Most of the time, when you plan to do a long-term exposure, longer than one second, you will see the effect of reciprocity.
In simple terms, Reciprocity means, that when you expose your film to the light for (most of the time) longer than one second,
the effect that the light has on the emulsion is reduced. Therefore you have to alter your exposure time to get a correctly exposed image.
Also, reciprocity could take effect, when you expose your image for a shorter time than 1/1000s.

The following tables give you the start time (the exposure time you plan to shoot at) and the corrected time (the altered exposure time).
Really hope this table is helpful for you. Please feel free to share this link. :-)

How to calculate reciprocity correction.

Most film manufacturers provide you with graphs on which you can search for your measured time and then read your corrected time. But most of the time you do not find the exact time you measured, that ´s why some of the manufacturers provide you with the so-called (most of the time) “P factors”.
With that given “P factor” and the following Formula, you can calculate your exact corrected exposure time. Please note, that with some Films, the reciprocity curve is not linear. Means that most of the time the formula only works with higher measured exposure times. Mostly 50s+ (usually you find further information in the datasheet of the Film.)

Here is the Formula.
Tc=TM^p (TC= Time Corrected TM= Time Measured p=1,31 (P is a factor calculated following a range of exposure times) )

Warning: Some of the times were as already mentioned taken from other online resources, some were calculated by myself. I can’t give you any guaranty! Use at own risk!

Kodak Professional Color Negative Films

For the prof. Kodak colour negative films Kodak tolled me as follows:

“For our professional colour negative films, no filter correction or exposure compensation is required for exposures from 1/10.000 second to 1 second.
For critical applications with longer exposure times, it is best to do some testing under your conditions.”

This Table helps you to convert the different Industry standards.

GOST: (russian: Государственный Стандарт (ГОСТ)/ State Standard
DIN:    (german: Deutsche Industrie Norm) / German Industry Standard
ASA:    American Standard Association

For example, if u own an old Soviet camera, the film (light meter) sensitivity is given in GOST. On some old German cameras, it could be DIN.
If you find your film sensitivity in degrees “°” eg. 27° which is 400 ASA, you can also use the DIN to convert into ASA/ISO values. Since DIN and degree ° have equal values.

If this table was helpful for you, please share the link :-)