See this conversion chart for a comparison of a positional (cylindrical) tolerance zone to a coordinate tolerance zone. This is an excerpt from Lowell Foster's, Geo-Metrics II, 1986 edition.
Hole size calculations
*************************************************************************
The formula for calculating hole sizes is the same, whether
using true position or coordinate dimensioning.
______________________________________________________________________
FLOATING CONDITION FIXED CONDITION
H = T + S H = T1 + T2 + S
H = min clearance hole S = max fastener size
T1 = tolerance on first part T = tolerance on each
T2 = tolerance on second part mating part
----------------------------------------------------------------------
EXAMPLE:Coordinate tolerancing True position tolerancing
(relys on probability) (takes all tolerances into account)
H = T + S H = T + S
H = .005 + .138 H = .014 + .138
H = .142 H = .152
HOLE SIZE = .142 MIN HOLE SIZE = .152 MIN
(Select drill 1 to 2 sizes over min hole)
To convert true position to coordinate: Multiply .70711 times 1/2 the total
true position tolerance zone[.e.g. .70711x.5(.014)=.0049 OR (+/- .005)]
To convert coordinate to true position: Multiply 1.4142 times twice the
coordinate tolerance. e.g. 1.4142 x 2(.005) = .0141 OR (.014)
It should be noted that the industry is leaning towards the latest
revision of ANSI-Y14.5, therefore; the true position tolerancing
method is preferred.
*************************************************************************
An