These cards provide a handy rough reference guide. Notice that the level of intoxication is directly correlated to not only the number of drinks, but body size and duration of drinking. For example, notice that with a single drink, at 100#, the girlfriend picks up a .029 whereas her 200# boyfriend drinking elbow-to-elbow picks up nearly exactly ½ that amount, at .015. Keep in mind that alcohol burns off at approximately .015% per hour. For example, a 180# person consuming 4 drinks over 2 hours would be expected to have a breath test reading of .04 (.07 minus .03 burn-off).

Widmark's Formula:

Fill-in the blanks below to compute what your breath alcohol level should have been:

* Indicates required fields.

A.Body weight (at time of breath test):
*
B.Total number of "drinks":
*
C.Peak blood alcohol level (from chart):
*
D.Time of 1st drink:
*  (hh:mm am/pm)
E.Time of driving (from citation):
*  (hh:mm am/pm)
G.Time of 1st breath test ("subject sample" from breath test printout):
*  (hh:mm am/pm)