Table 3.

Differences between co-existing breath-alcohol concentration (BrAC) and venous blood-alcohol concentration (BAC) in relation to a person’s actual blood–breath ratio (BBR), compared with the ratio of 2 100:1 (shaded) used to set the statutory breath-alcohol limit for driving.

Venous BAC g/100 mL	BBR 1 800	BBR 1 900	BBR 2 000	BBR 2 100	BBR 2 200	BBR 2 300	BBR 2 400	BBR 2 500
0.020 0.02	0.023 0.02	0.022 0.02	0.021 0.02	0.020 0.02	0.019 0.01	0.018 0.01	0.017 0.01	0.016 0.01
0.050 0.05	0.058 0.05	0.055 0.05	0.052 0.05	0.050 0.05	0.047 0.04	0.045 0.04	0.043 0.04	0.042 0.04
0.080 0.08	0.093 0.09	0.088 0.08	0.084 0.08	0.080 0.08	0.076 0.07	0.073 0.07	0.070 0.07	0.067 0.06
0.100 0.10	0.116 0.11	0.110 0.11	0.105 0.10	0.100 0.10	0.095 0.09	0.091 0.09	0.087 0.08	0.084 0.08

Results are shown before and after truncation of the third decimal place, which is common practice in many legal jurisdictions.