A very useful concept is the mired shift. Mathematically, this is defined as
1000 * (1000/T2 - 1000/T1)
where T1 is the color temperature you have and T2 is the color temperature you desire (for example the color temperature of your film). The mired shift is sometimes called the light balance (LB) index of the filter, and it is listed in the table above.
There are two great things about the LB index for a filter:
1. It doesn't depend on the color temperature, and
2. It is additive.
The first point means that an 80A (LB -131) filter will not only change light with a photographic color temperature of 3200K to 5500K, but also for example 2256K to 3200K - also a shift with a mired of -131.
The second point means that you can obtain a LB index that is not in the table by combining filters (i.e. placing more than one filter before the lens). Suppose as an example that you need to convert 11,000K (a clear bright day) to 5500K. Using the formula above you know you need a LB index of 91 mired, so you might use a 85C with a 81 filter (+81+9 = +90 mired).