Caffeine in drinks
How much caffeine is in Frozen blended coffee?
Data checked against the source on 2026-10-03 by Oleksii Y.
One Medium (496 g) of Frozen blended coffee has 163.7 mg of caffeine, according to USDA Agricultural Research Service, FoodData Central (FNDDS).
How Frozen blended coffee compares
- Strength: 33 mg per 100 g.
- One Medium (496 g) has as much caffeine as about 1.5 cups of brewed coffee, which has 94.8 mg per 8 fl oz cup.
- Of the 13 other coffee drinks in our coffee chart, 1 has more caffeine per serving and 12 have less.
How much will be left at bedtime?
1 × Medium (496 g) of Frozen blended coffee
Left at 11:00 PM (8 h later), average metabolism
≈ 54 mg
Range 26–82 mg (fast to slow metabolism)
To be at 50 mg or less by bedtime, have 164 mg by 1:41 PM (average) or 8:32 AM (slow metabolism).
What sleep studies found near this dose
- Gardiner et al. 2023 (meta-analysis): To avoid losing sleep time, the authors suggest a coffee (107 mg per 250 ml) at least 8.8 hours before bed.
- Gardiner et al. 2023 (meta-analysis): For a pre-workout serving (217.5 mg), the authors suggest at least 13.2 hours before bed.
Estimate from a simple model: half-life of 3, 5 or 8 hours, 50 mg bedtime target. How we calculate
Caffeine by size
| Serving | Caffeine |
|---|---|
| Medium (496 g) | 163.7 mg |
| 8 fl oz cup (248 g) | 81.8 mg |
How long does Frozen blended coffee stay in your system?
Our model halves caffeine every 5 hours for average metabolism, and every 3 or 8 hours for fast or slow metabolism. From one Medium (496 g) of Frozen blended coffee (164 mg), about 82 mg is still in your body 5 hours later and about 41 mg after 10 hours. If you clear caffeine slowly (an 8-hour half-life), about 69 mg is left after 10 hours.
Estimated caffeine left at 11:00 PM from one Medium (496 g) (164 mg), using a half-life of 5 hours for average metabolism and 3 to 8 hours for the range. How we calculate
| Had at | Left at bedtime (average) | Range |
|---|---|---|
| 8:00 AM (15 h before bed) | ≈ 21 mg | 5–45 mg |
| 12:00 PM (11 h before bed) | ≈ 36 mg | 13–63 mg |
| 3:00 PM (8 h before bed) | ≈ 54 mg | 26–82 mg |
| 6:00 PM (5 h before bed) | ≈ 82 mg | 52–106 mg |
How many fit in a day?
Reference amounts are for caffeine from all sources combined. Counted at the upper end of the stated amount, one serving at a time:
- Up to 400 mg a day for most healthy adults (FDA, EFSA): about 2 servings.
- Up to 200 mg at one time for healthy adults (EFSA): about 1 serving in one go.
- Up to 200 mg a day in pregnancy (EFSA, NHS): about 1 serving.
These are reference amounts for groups of people, not a personal limit. Some people feel jittery or sleep worse on much less. See the cutoff calculator for timing.
Good to know
USDA's value is a recipe estimate built from 62 g espresso, 183 g milk, 43.75 g sugar and 111 g ice, not a lab measurement.
How the serving amount was worked out: USDA lists 33 mg per 100 g; 496 g × 0.33 = 163.7 mg; 248 g × 0.33 = 81.8 mg.
Common questions
How much caffeine is in Frozen blended coffee?
USDA Agricultural Research Service, FoodData Central (FNDDS) gives 163.7 mg of caffeine per Medium (496 g). Other sizes are in the table on this page.
How many Frozen blended coffee servings can I have in a day?
The FDA and EFSA cite up to 400 mg of caffeine a day, from all sources combined, for most healthy adults. At 163.7 mg per Medium (496 g), that is about 2 servings if Frozen blended coffee is your only source. In pregnancy the reference is 200 mg a day.
How late can I drink Frozen blended coffee?
With an 11:00 PM bedtime, our model suggests having one serving by about 1:41 PM for average metabolism, or 8:32 AM if you clear caffeine slowly. This is an estimate, not a rule.
How long does Frozen blended coffee stay in your system?
Of the 164 mg in one Medium (496 g), roughly 82 mg remains after 5 hours and 41 mg after 10 hours with our average 5-hour half-life. From fast to slow metabolism, 10 hours later it is between 16 and 69 mg.
Where the number comes from
- Frozen coffee drink. USDA Agricultural Research Service, FoodData Central (FNDDS). FDC ID 2710398, nutrient "Caffeine" (262): portions "1 medium" = 496 g and "1 cup (8 fl oz)" = 248 g; recipe ingredients. Accessed 2026-10-02. Source ↗
Recipes and labels change. If a number here no longer matches the label, the label wins.
General information, not medical advice
If you feel unwell after caffeine — for example chest pain, a fast or irregular heartbeat that does not settle, fainting, confusion or trouble breathing — get urgent medical help. If you are pregnant or breastfeeding, under 18, take medication, or have a heart, liver or anxiety condition, high blood pressure or a sleep disorder, ask a doctor or pharmacist what amount is right for you.
Sources
- U.S. Food and Drug Administration (2024). Spilling the Beans: How Much Caffeine is Too Much? FDA Consumer Updates. fda.gov ↗
- European Food Safety Authority. Caffeine | EFSA. EFSA topic page (summary of the 2015 Scientific Opinion on the safety of caffeine). efsa.europa.eu ↗
- NHS. Foods to avoid in pregnancy. NHS. nhs.uk ↗
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