Caffeine & Sleep
Soda

Caffeine in Diet Mountain Dew

54mg
per 12 oz
≈ 1 coffee≈ 1 Red Bull14% of FDA daily max

Is that a lot?

Diet Mountain Dew is 14% of the FDA’s recommended daily maximum, in a single 12 oz.

Green tea
28 mg
Diet Mountain Dew
54 mg
Espresso
63 mg
Red Bull
80 mg
Coffee
95 mg
FDA daily max · 400mg
Before bed

When can I drink Diet Mountain Dew and still sleep?

Your Diet Mountain Dew cutoff
You drink it at
Bedtime
Diet Mountain Dew · 54 mg · assuming an average ~5 h half-life
At bedtime
18 mg
close to optimal
Latest safe Diet Mountain Dew: 10:27 PM

How much caffeine is in Diet Mountain Dew?

Diet Mountain Dew keeps the regular Dew's 54 mg of caffeine per 12 oz can while dropping all the sugar. It's the sugar-free way to get the most caffeinated mainstream soda's kick.

ServingCaffeineSugar
12 oz54 mg0 g

Will Diet Mountain Dew affect your sleep?

From 54 mg, Diet Dew sits just over the 50 mg threshold and dips below within an hour. An afternoon can is usually fine by bedtime, though several through the evening can add up.

Source: PepsiCo product facts

Related drinks

Diet Mountain Dew & sleep — FAQ

At 54 mg it's one of the stronger sodas, starting just above the 50 mg threshold, so an evening can might make settling down a little harder for sensitive people.

Diet Mountain Dew has 54 mg per 12 oz — about 14% of the FDA’s 400 mg daily maximum for healthy adults. That’s roughly 1 cup of coffee.

It depends on your bedtime and how fast you clear caffeine. Use the calculator above to see when Diet Mountain Dew drops below the ~50 mg “ok to sleep” threshold for your bedtime.

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