How much caffeine is in Mr. Goodbar?

One bar (1.75 oz, 49 g) of Mr. Goodbar has 8.8 mg of caffeine.

You would need about 11 of these to equal a cup of brewed coffee (95 mg).

Source: USDA FoodData Central · checked 10 Nov 2026

When did you have it?

Had at 3 pm, about 3.1 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.

Bedtime

Add this to my day

Your whole day, every drink, in the free CaffeineIQ check. The iPhone app is coming soon.

Per 100 g that is about 18 mg of caffeine.

Latest time to eat it

For an 11 pm bedtime, one bar (1.75 oz, 49 g) of Mr. Goodbar stays under the 50 mg most people sleep fine with, even late in the evening. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.

Bedtime	Very sensitive under 25 mg	Average under 50 mg	Not very sensitive under 100 mg
9 pm	Any time	Any time	Any time
10 pm	Any time	Any time	Any time
11 pm	Any time	Any time	Any time
Midnight	Any time	Any time	Any time
1 am	Any time	Any time	Any time

For one bar (1.75 oz, 49 g) of Mr. Goodbar, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.

How long it lasts

The caffeine from one bar (1.75 oz, 49 g) of Mr. Goodbar peaks in your blood about 75 minutes after you start it, at roughly 7.5 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.

Time after	3 hours	6 hours	9 hours	12 hours
Still in you	6.2 mg	4.1 mg	2.7 mg	1.8 mg

So one had at 3 pm leaves about 3.1 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

Mr. Goodbar is stronger than 17% of the 37 foods we track, by caffeine per serving.

To reach 400 mg in a day you would need about 45 of these.

Less caffeine

Hot Chocolate 7.4 mg, 8 fl oz cup
Chocolate Gelato 7 mg, 1 cup
Kit Kat 5.9 mg, 1 bar

More caffeine

Chocolate Muffin 9 mg, 1 large muffin
Semisweet Chocolate Chips 9 mg, 1 serving
Hershey's Milk Chocolate Bar 10 mg, 1 bar

Same caffeine: Chocolate Frozen Yogurt.

FAQ

Is Mr. Goodbar high in caffeine?

No, it is low. One bar (1.75 oz, 49 g) of Mr. Goodbar has 8.8 mg, which is 9% of the 95 mg in an 8 fl oz cup of brewed coffee.

Can I eat Mr. Goodbar at night?

For most people, yes: even late in the evening one bar (1.75 oz, 49 g) of Mr. Goodbar stays under 50 mg at an 11 pm bedtime.

How long does the caffeine in Mr. Goodbar last?

It peaks about 75 minutes after you start it. Of the 8.8 mg, about 4.1 mg is still in you 6 hours later and 1.8 mg after 12 hours, for an average adult with a 5-hour half-life.

Does Mr. Goodbar have more caffeine than a cup of coffee?

No. One bar (1.75 oz, 49 g) of Mr. Goodbar has 8.8 mg; an 8 fl oz cup of coffee has 95 mg.

Method and limits

The caffeine figure comes from USDA FoodData Central; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.

These are estimates for information, not medical advice.