When Can I Drive After 2 Glasses of Wine?
Two glasses of wine over dinner is a common scenario. Whether it is safe to drive afterwards depends almost entirely on your weight and sex. For heavier males, two standard pours may keep BAC under 0.08%. For lighter women, two glasses can produce a BAC significantly above the legal limit.
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.
Two standard glasses of wine (150 ml each at 13% ABV) contain approximately 31.2 grams of ethanol — equivalent to roughly 2.2 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 2 Glasses of Wine by Weight and Sex
Peak BAC immediately after consuming 2 glasses of wine, 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 | 0.084% | 0.104% | 0.3 hrs | 1.6 hrs | 5.6 hrs | 6.9 hrs |
| 140 lb | 0.072% | 0.089% | Already under | 0.6 hrs | 4.8 hrs | 5.9 hrs |
| 160 lb | 0.063% | 0.078% | Already under | Already under | 4.2 hrs | 5.2 hrs |
| 180 lb | 0.056% | 0.069% | Already under | Already under | 3.7 hrs | 4.6 hrs |
| 200 lb | 0.051% | 0.063% | Already under | Already under | 3.4 hrs | 4.2 hrs |
| 220 lb | 0.046% | 0.057% | Already under | Already under | 3.1 hrs | 3.8 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?
Two glasses of wine consumed over 2 hours means approximately 0.030% is eliminated during drinking. For a 180 lb male (peak 0.067%), the effective BAC at the 2-hour mark is about 0.037% — under the limit. For a 140 lb female (peak 0.110%), effective BAC at 2 hours is about 0.080% — right at the limit.
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 2 glasses of wine, males above 180 lb may be under 0.08% from the start, but should still wait 4+ hours to reach 0.00%. Women and lighter men should wait 1–3 hours to reach the legal threshold and 5–9 hours to reach 0.00%. When in doubt, take a cab or ride-share.
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
Am I over the legal limit after 2 glasses of wine?
At 150 ml per glass and 13% ABV, two glasses provide 31.2g of ethanol. A 120 lb female will have a BAC of approximately 0.130%, well over the limit. A 180 lb male will be at approximately 0.067% — under 0.08% but still impaired. See the full table for your weight.
How long after 2 glasses of wine can I drive?
For a 160 lb male (BAC ~0.064%), you are under the legal limit but not zero — wait about 4.3 hours to clear completely. For a 120 lb female (BAC ~0.130%), wait 1 hour to reach 0.08% and 8.7 hours to reach 0.00%.
What if I had 2 large glasses (250 ml each)?
Two 250 ml glasses at 13% ABV contain 52g of ethanol — significantly more than the 31.2g assumed above. This is equivalent to drinking over 3.7 standard drinks, and would put virtually everyone over the legal limit. Always account for pour size.
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.