BAC Chart by Weight & Drinks: Male & Female Tables
Instant reference blood alcohol concentration (BAC) tables calculated across standard weights and drink counts.
Blood Alcohol Concentration Chart
| Weight | 1 drink | 2 drinks | 3 drinks | 4 drinks | 5 drinks | 6 drinks | 7 drinks | 8 drinks | 9 drinks | 10 drinks |
|---|---|---|---|---|---|---|---|---|---|---|
| 100 lbs | 0.05% | 0.09% | 0.14% | 0.18% | 0.23% | 0.27% | 0.32% | 0.36% | 0.41% | 0.45% |
| 120 lbs | 0.04% | 0.08% | 0.11% | 0.15% | 0.19% | 0.23% | 0.26% | 0.30% | 0.34% | 0.38% |
| 140 lbs | 0.03% | 0.06% | 0.10% | 0.13% | 0.16% | 0.19% | 0.23% | 0.26% | 0.29% | 0.32% |
| 160 lbs | 0.03% | 0.06% | 0.09% | 0.11% | 0.14% | 0.17% | 0.20% | 0.23% | 0.26% | 0.28% |
| 180 lbs | 0.03% | 0.05% | 0.08% | 0.10% | 0.13% | 0.15% | 0.18% | 0.20% | 0.23% | 0.25% |
| 200 lbs | 0.02% | 0.05% | 0.07% | 0.09% | 0.11% | 0.14% | 0.16% | 0.18% | 0.20% | 0.23% |
| 220 lbs | 0.02% | 0.04% | 0.06% | 0.08% | 0.10% | 0.12% | 0.14% | 0.17% | 0.19% | 0.21% |
| 240 lbs | 0.02% | 0.04% | 0.06% | 0.08% | 0.09% | 0.11% | 0.13% | 0.15% | 0.17% | 0.19% |
| Weight | 1 drink | 2 drinks | 3 drinks | 4 drinks | 5 drinks | 6 drinks | 7 drinks | 8 drinks | 9 drinks | 10 drinks |
|---|---|---|---|---|---|---|---|---|---|---|
| 100 lbs | 0.03% | 0.08% | 0.12% | 0.17% | 0.21% | 0.26% | 0.30% | 0.35% | 0.39% | 0.44% |
| 120 lbs | 0.02% | 0.06% | 0.10% | 0.14% | 0.17% | 0.21% | 0.25% | 0.29% | 0.33% | 0.36% |
| 140 lbs | 0.02% | 0.05% | 0.08% | 0.11% | 0.15% | 0.18% | 0.21% | 0.24% | 0.28% | 0.31% |
| 160 lbs | 0.01% | 0.04% | 0.07% | 0.10% | 0.13% | 0.16% | 0.18% | 0.21% | 0.24% | 0.27% |
| 180 lbs | 0.01% | 0.04% | 0.06% | 0.09% | 0.11% | 0.14% | 0.16% | 0.19% | 0.21% | 0.24% |
| 200 lbs | 0.01% | 0.03% | 0.05% | 0.08% | 0.10% | 0.12% | 0.14% | 0.17% | 0.19% | 0.21% |
| 220 lbs | 0.01% | 0.03% | 0.05% | 0.07% | 0.09% | 0.11% | 0.13% | 0.15% | 0.17% | 0.19% |
| 240 lbs | 0.00% | 0.02% | 0.04% | 0.06% | 0.08% | 0.10% | 0.12% | 0.14% | 0.16% | 0.17% |
| Weight | 1 drink | 2 drinks | 3 drinks | 4 drinks | 5 drinks | 6 drinks | 7 drinks | 8 drinks | 9 drinks | 10 drinks |
|---|---|---|---|---|---|---|---|---|---|---|
| 100 lbs | 0.06% | 0.11% | 0.17% | 0.22% | 0.28% | 0.34% | 0.39% | 0.45% | 0.51% | 0.56% |
| 120 lbs | 0.05% | 0.09% | 0.14% | 0.19% | 0.23% | 0.28% | 0.33% | 0.37% | 0.42% | 0.47% |
| 140 lbs | 0.04% | 0.08% | 0.12% | 0.16% | 0.20% | 0.24% | 0.28% | 0.32% | 0.36% | 0.40% |
| 160 lbs | 0.04% | 0.07% | 0.11% | 0.14% | 0.18% | 0.21% | 0.25% | 0.28% | 0.32% | 0.35% |
| 180 lbs | 0.03% | 0.06% | 0.09% | 0.12% | 0.16% | 0.19% | 0.22% | 0.25% | 0.28% | 0.31% |
| 200 lbs | 0.03% | 0.06% | 0.08% | 0.11% | 0.14% | 0.17% | 0.20% | 0.22% | 0.25% | 0.28% |
| 220 lbs | 0.03% | 0.05% | 0.08% | 0.10% | 0.13% | 0.15% | 0.18% | 0.20% | 0.23% | 0.26% |
| 240 lbs | 0.02% | 0.05% | 0.07% | 0.09% | 0.12% | 0.14% | 0.16% | 0.19% | 0.21% | 0.23% |
| Weight | 1 drink | 2 drinks | 3 drinks | 4 drinks | 5 drinks | 6 drinks | 7 drinks | 8 drinks | 9 drinks | 10 drinks |
|---|---|---|---|---|---|---|---|---|---|---|
| 100 lbs | 0.04% | 0.10% | 0.15% | 0.21% | 0.27% | 0.32% | 0.38% | 0.43% | 0.49% | 0.55% |
| 120 lbs | 0.03% | 0.08% | 0.13% | 0.17% | 0.22% | 0.27% | 0.31% | 0.36% | 0.41% | 0.45% |
| 140 lbs | 0.03% | 0.07% | 0.11% | 0.15% | 0.19% | 0.23% | 0.27% | 0.31% | 0.35% | 0.39% |
| 160 lbs | 0.02% | 0.06% | 0.09% | 0.13% | 0.16% | 0.20% | 0.23% | 0.27% | 0.30% | 0.34% |
| 180 lbs | 0.02% | 0.05% | 0.08% | 0.11% | 0.14% | 0.17% | 0.20% | 0.23% | 0.27% | 0.30% |
| 200 lbs | 0.01% | 0.04% | 0.07% | 0.10% | 0.13% | 0.15% | 0.18% | 0.21% | 0.24% | 0.27% |
| 220 lbs | 0.01% | 0.04% | 0.06% | 0.09% | 0.11% | 0.14% | 0.16% | 0.19% | 0.21% | 0.24% |
| 240 lbs | 0.01% | 0.03% | 0.06% | 0.08% | 0.10% | 0.13% | 0.15% | 0.17% | 0.20% | 0.22% |
Understanding the BAC Chart by Weight and Drink Volume
This BAC chart illustrates the theoretical peak blood alcohol concentration resulting from rapid ingestion of standard alcoholic drinks. Because ethanol rapidly mixes with circulating blood and extracellular fluid, body weight and biological water fraction are the two primary physical determiners of peak concentration.
Keep in mind that this static blood alcohol concentration chart represents instantaneous peak estimates before elimination. In real social settings, drinks are consumed over hours, during which your liver actively metabolizes alcohol at roughly 0.015% BAC per hour.
Key Differences Across Biological Sex & Weight Bands
Comparing the male and female BAC level chart values reveals significant physiological variance:
Body Weight Dilution
A 200 lb male reaches approximately 0.045% BAC after 2 standard drinks, whereas a 120 lb male reaches 0.076% from the exact same dose due to a much smaller total volume of distribution.
Sex Distribution Factors (r)
Biological females possess an average distribution factor of r = 0.55 (vs 0.68 in males), resulting in roughly 24% higher blood alcohol concentrations for identical weight and consumption.
Legal Limits Reference
In 49 US states, 0.08% BAC constitutes per se DUI (0.05% in Utah). Commercial drivers face a 0.04% threshold. Drivers under 21 face strict zero-tolerance laws (0.00%–0.02%).
Frequently Asked Questions: BAC Charts & Tables
How do I read this bac chart by weight?
Find your body weight along the left vertical column and look across to the column corresponding to the number of standard drinks consumed (14 grams of ethanol each). The intersection indicates theoretical immediate peak blood alcohol concentration before elimination.
Does this blood alcohol concentration chart account for elapsed time?
Our default peak table depicts estimated peak BAC assuming all drinks consumed at once. Use the "1 Hour Later" tab view to observe concentrations after one hour of hepatic elimination (subtracting approximately 0.015% BAC).
Why does the female bac level chart show higher numbers than the male chart?
Biological females typically have higher percentage body fat and lower average total body water (approximately 52% vs 61% in biological males). Because alcohol distributes exclusively in water, an identical dose of alcohol dissolves in a smaller volume of body water in females, resulting in higher peak concentration.
What counts as one standard drink on this bac chart?
In the United States, a standard drink contains exactly 14.0 grams (0.6 fluid ounces) of pure ethanol. This is equivalent to 12 oz of 5% beer, 5 oz of 12% table wine, or 1.5 oz of 40% (80-proof) distilled spirits.
Primary Scientific Sources
Calculated using Erik M.P. Widmark (1932) distribution factors (r = 0.68 male, 0.55 female), Watson, Watson & Batt (1980; 1981) total body water research, and standard US drink ethanol mass (14.0 grams) documented by the National Institute on Alcohol Abuse and Alcoholism (NIAAA). Elimination rates reference Jones AW (2010).