Understanding BAC
How do you know the right amount of alcohol for you? We recommend that you check out a BAC (blood alcohol concentration) calculator and make sure that your BAC stays in the Green Zone (between .00-.06).
BAC (Blood Alcohol Concentration) is the percentage of your blood volume that is alcohol. The more you drink, the more your BAC increases.
BAC Calculator
This calculator will help you make a calculation for your BAC.
Step 1: Identify if you are male or female.
Step 2: Enter how many 12 oz (can) of beer, 5 oz (small glass) of wine, 1.5 oz (shot) of hard liquor you consumed.
Step 3: Enter over how long a period of time you consumed alcohol.
Step 4: Enter your body weight.
This will provide you with an estimated BAC. Below you will also find BAC charts to help with this calculation as well.
Estimating Blood Alcohol Concentration (Based on Weight and Gender)
Males
| Weight |
Drinks |
|
1
|
2
|
3
|
4
|
5
|
6
|
7 |
8 |
9
|
10 |
| 100 lbs |
.043 |
.087 |
.130 |
.174 |
.217 |
.261 |
.304 |
.348 |
.391 |
.435 |
| 125 lbs |
.034 |
.069 |
.103 |
.139 |
.173 |
.209 |
.242 |
.278 |
.312 |
.346 |
| 150 lbs |
.029 |
.058 |
.087 |
.116 |
.145 |
.174 |
.203 |
.232 |
.261 |
.290 |
| 175 lbs |
.025 |
.050 |
.075 |
.100 |
.125 |
.150 |
.175 |
.200 |
.225 |
.250 |
| 200 lbs |
.022 |
.043 |
.065 |
.087 |
.108 |
.130 |
.152
|
.174 |
.195 |
.217 |
| 225 lbs |
.019 |
.039 |
.058 |
.078 |
.097 |
.117 |
.136 |
.156 |
.175 |
.195 |
| 250 lbs |
.017 |
.035 |
.052 |
.070 |
.087 |
.105 |
.122 |
.139 |
.156 |
.17 |
Females
| Weight |
Drinks
|
|
1 |
2
|
3 |
4 |
5
|
6 |
7
|
8 |
9 |
10 |
100 lbs
|
.050 |
.101 |
.152 |
.203 |
.253 |
.304 |
.355 |
.406 |
.456 |
.507 |
125 lbs
|
.040 |
.080 |
.120 |
.162 |
.202
|
.244
|
.282 |
.324 |
.364 |
.404 |
150 lbs
|
.034 |
.068 |
.101 |
.135
|
.169
|
.203 |
.237
|
.271 |
.304 |
.338 |
175 lbs
|
.029 |
.058 |
.087 |
.117
|
.146
|
.175
|
.204
|
.233 |
.262 |
.292 |
200 lbs
|
.026 |
.050 |
.076
|
.101 |
.126
|
.152
|
.177
|
.203 |
.227
|
.253 |
225 lbs
|
.022 |
.045 |
.068 |
.091
|
.113
|
.136
|
.159
|
.182 |
.204 |
.227 |
250 lbs
|
.020 |
.041 |
.061 |
.082
|
.101 |
.122 |
.142
|
.162 |
.182 |
.2 |
Time Factor Table
| Hours since first drink |
1
|
2 |
3
|
4
|
5 |
6
|
| Subtract from BAC |
.015 |
.030
|
.045
|
.060
|
.075
|
.0
|
What do these numbers mean?
Blood Alcohol
Concentration |
Changes in Feelings
and Personality |
Physical and Mental
Impairments |
| 0.01 — 0.06 |
Relaxation
Sense of Well-being
Loss of Inhibition
Lowered Alertness
Joyous |
Thought
Judgment
Coordination
Concentration |
| 0.06 — 0.10 |
Blunted Feelings
Disinhibition
Extroversion
Impaired Sexual Pleasure |
Reflexes Impaired
Reasoning
Depth Perception
Distance Acuity
Peripheral Vision
Glare Recovery |
| 0.11 — 0.20 |
Over-Expression
Emotional Swings
Angry or Sad
Boisterous |
Reaction Time
Gross Motor Control
Staggering
Slurred Speech |
| 0.21 — 0.29 |
Stupor
Lose Understanding
Impaired Sensations |
Severe Motor Impairment
Loss of Consciousness
Memory Blackout
|
| 0.30 — 0.39 |
Severe Depression
Unconsciousness
Death Possible |
Bladder Function
Breathing
Heart Rate |
| => 0.40 |
Unconsciousness
Death |
Breathing
Heart Rate |