When Can I Drive After 4 Shots?
Four shots of spirits — whether taken as straight shots, in cocktails, or mixed drinks — represents binge drinking territory for most adults. The resulting BAC will be above the legal limit for virtually everyone, with wait times stretching well into the evening or overnight. Here are the precise figures.
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →The Math: How BAC Is Calculated
BAC is calculated using the Widmark formula: BAC = (ethanol grams × 100) / (weight_kg × r × 1000), where r = 0.68 for males and r = 0.55 for females, and weight_kg = lb / 2.205.
Four standard shots (44 ml each at 40% ABV) contain approximately 56 grams of ethanol — equivalent to 4 standard drinks. Alcohol is then eliminated at approximately 0.015% BAC per hour. The table below shows peak BAC (no metabolism during drinking) and the hours needed to reach key thresholds.
BAC Chart for 4 Standard Shots by Weight and Sex
Peak BAC immediately after consuming 4 standard shots, before any metabolism is applied. Hours to 0.08% and 0.00% are calculated from this peak at 0.015%/hr.
| Weight | Male BAC | Female BAC | Male → 0.08% | Female → 0.08% | Male → 0.00% | Female → 0.00% |
|---|---|---|---|---|---|---|
| 120 lb | 0.151% | 0.187% | 4.7 hrs | 7.1 hrs | 10.1 hrs | 12.5 hrs |
| 140 lb | 0.130% | 0.160% | 3.3 hrs | 5.3 hrs | 8.7 hrs | 10.7 hrs |
| 160 lb | 0.113% | 0.140% | 2.2 hrs | 4.0 hrs | 7.5 hrs | 9.3 hrs |
| 180 lb | 0.101% | 0.125% | 1.4 hrs | 3.0 hrs | 6.7 hrs | 8.3 hrs |
| 200 lb | 0.091% | 0.112% | 0.7 hrs | 2.1 hrs | 6.1 hrs | 7.5 hrs |
| 220 lb | 0.083% | 0.102% | 0.2 hrs | 1.5 hrs | 5.5 hrs | 6.8 hrs |
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →What If You Drank Over More Than 1 Hour?
Four shots spread over 4 hours allows your body to eliminate 0.060% BAC during drinking. This significantly reduces effective BAC for heavier individuals, but lighter people and women will still be above or near the legal limit at the end of 4 hours of paced drinking.
What Factors Make Your BAC Higher or Lower?
- Body composition: Higher body fat percentage (less body water) means higher BAC per drink. Muscular individuals may have lower BAC than the table suggests.
- Food: Eating before or during drinking slows alcohol absorption and reduces peak BAC by up to 50%. The table assumes drinking without food.
- Drinking speed: Spreading drinks over more time allows metabolism to offset absorption, reducing peak BAC. The table shows worst-case (all drinks at once).
- Tolerance: Tolerance affects how drunk you feel, not your actual BAC. A high-tolerance drinker feels less impaired at 0.10% but is equally impaired on measurable tests.
- Medications: Many medications interact with alcohol and can raise effective BAC or increase impairment.
The Bottom Line: When Is It Safe to Drive?
After 4 shots, no one should drive for at least 3–4 hours (for heavier males) and up to 9–11 hours for lighter women. If these were doubles or higher-ABV spirits, double the numbers. Have a plan before you start drinking.
The legal limit in most US states is 0.08%. Utah's limit is 0.05%. Commercial drivers face a 0.04% limit. International limits are often lower (0.05% in most of Europe, 0.02% in Sweden and Poland). If you are driving internationally or professionally, use the appropriate threshold.
When in doubt, do not drive. A ride-share, taxi, or designated driver is always the right call.
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →Frequently Asked Questions
How many hours after 4 shots can I drive?
For a 180 lb male (peak BAC ~0.114%), about 2.3 hours to reach 0.08% and 7.6 hours to reach 0.00%. For a 160 lb female (peak BAC ~0.141%), about 4.1 hours to reach 0.08% and 9.4 hours to reach 0.00%. Lighter individuals face 10+ hours to clear.
Are 4 shots enough to get drunk?
For most adults, 4 shots in a short period will produce noticeable intoxication and a BAC well above the legal limit. Signs of impairment at 0.08–0.12% BAC include slowed reaction time, reduced coordination, impaired judgment, and overconfidence in one's abilities.
What if I had 4 shots over 4 hours?
Spread over 4 hours, 0.060% BAC is eliminated during drinking. For a 200 lb male (peak 0.091%), effective BAC at 4 hours is about 0.031%. For a 160 lb female (peak 0.141%), effective BAC at 4 hours is about 0.081% — still slightly over the limit.
Disclaimer: This article is for educational purposes only and does not constitute legal or medical advice. BAC estimates are approximations. Individual results vary based on body composition, food intake, health status, and other factors. Never drive if you feel impaired. When in doubt, don't drive.