Mountain Dew vs Sun Drop: caffeine compared
Sun Drop (12 oz) has 64 mg of caffeine, 10 mg more than Mountain Dew (12 oz, 54 mg) — 1.2× as much per serving. Per fluid ounce, Sun Drop is the stronger drink: 5.3 mg/oz versus 4.5 mg/oz.
| Mountain Dew | Sun Drop | |
|---|---|---|
| Serving | 12 oz | 12 oz |
| Caffeine per serving | 54 mg | 64 mg |
| Per fl oz | 4.5 mg | 5.3 mg |
| Share of 400 mg/day | 14% | 16% |
| Servings to reach 400 mg | 7.4 | 6.2 |
| Hours until under 50 mg | 0.6 h | 1.8 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 10:27 PM | 9:13 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 5:27 PM | 4:13 PM |
| Share of the 200 mg pregnancy limit | 27% | 32% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Mountain Dew or Sun Drop?
Sun Drop (12 oz) has about 64 mg versus 54 mg in Mountain Dew (12 oz): 10 mg more, or 1.2× as much.
Which is stronger per ounce, Mountain Dew or Sun Drop?
Sun Drop: about 5.3 mg per fl oz versus 4.5 mg for Mountain Dew. Serving size decides the total you actually drink.
How many Mountain Dew servings equal one Sun Drop?
About 1.2 servings of Mountain Dew (12 oz) match the caffeine in one Sun Drop (12 oz).
When should I stop drinking Mountain Dew or Sun Drop before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Mountain Dew by 10:27 PM, last Sun Drop by 9:13 PM. Half-life varies from about 1.5 to 9.5 hours between people.
Method
Caffeine per labeled serving, from the same drink table every calculator here uses (FDA/USDA reference amounts and manufacturer labels; see caffeine content of every drink). Brewed drinks vary batch to batch, so read these as typical values. Decay uses a 5-hour average half-life with a 45-minute absorption ramp; cutoff = bedtime − 5 h × log₂(dose ÷ limit). Percentages use the FDA's 400 mg/day figure for healthy adults and the 200 mg/day limit ACOG gives for pregnancy.
Source — Mountain Dew: PepsiCo Product Facts — Mountain Dew, checked 2026-10-13. 54 mg per 12 fl oz serving.
Source — Sun Drop: Keurig Dr Pepper Product Facts — Sun Drop 20 fl oz, checked 2026-10-13. Approx. 106 mg per 20 fl oz, scaled to 12 oz.