How much caffeine is in Mountain Dew (12oz can)?
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Caffeine content
54 mg
per 12 fl oz (355 ml)
About this drink
Mountain Dew has the highest caffeine of major U.S. mainstream sodas at 54 mg per can — about 50% more than Coca-Cola. The bright yellow color and citrus flavor mask the strength.
Ingredients: Carbonated water, HFCS, citric acid, natural flavors, caffeine, sodium benzoate, yellow 5
When will it clear your system?
54 mg with rapid absorption (carbonation + no fat). A Mountain Dew at 4pm sits at ~27 mg by 9pm.
Based on caffeine's 5-hour half-life, a Mountain Dew (12oz can) consumed at 2:00 PM drops below the sleep-safe threshold (~20 mg) by approximately 21:10 the same evening.
Where this fits in a daily limit
That's about 27% of the 200 mg pregnancy guideline and 14% of the 400 mg general adult daily limit — comfortably moderate.
See our pregnancy caffeine guide or half-life sleep math for the deep dive.
How it compares
| Drink | Caffeine |
|---|---|
Mountain Dew (12oz can) Mountain Dew | 54 mg |
| Coca-Cola (12oz can) Coca-Cola | 34 mg |
| Dr Pepper (12oz can) Dr Pepper | 41 mg |
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Learn more about SipNoteFrequently asked questions
How much caffeine is in a Mountain Dew (12oz can)?
A 12 fl oz (355 ml) Mountain Dew (12oz can) contains approximately 54 mg of caffeine. Actual values may range from 54 to 54 mg depending on preparation and source variation.
Is Mountain Dew (12oz can) safe during pregnancy?
The current ACOG and NHS guideline is under 200 mg of caffeine per day during pregnancy. A Mountain Dew (12oz can) fits comfortably within that limit. Always consult your obstetrician for personalized advice.
When should I stop drinking Mountain Dew (12oz can) for sleep?
Caffeine has a 5-hour half-life. To have under 20 mg circulating at bedtime (the typical sleep-safe threshold), stop drinking Mountain Dew (12oz can) about 8 hours before sleep. 54 mg with rapid absorption (carbonation + no fat). A Mountain Dew at 4pm sits at ~27 mg by 9pm.
Mountain Dew (12oz can) vs Coca-Cola (12oz can) — which has more caffeine?
Mountain Dew (12oz can) contains 54 mg per serving; Coca-Cola (12oz can) contains 34 mg per 12 fl oz (355 ml). Mountain Dew (12oz can) is the stronger of the two.
Does Mountain Dew (12oz can) keep you awake?
54 mg is moderate caffeine. Most people can drink Mountain Dew (12oz can) in the afternoon without notable sleep impact.
Caffeine values shown are typical for the listed serving size. Actual content varies by preparation, brewing method, batch, and brand reformulation. Not medical advice — consult a healthcare provider for personalized guidance.