Instant Coffee contains 62 mg of caffeine per 8 oz cup (237 ml / 8 oz). That is about 65% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 26 mg per 100 ml.
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Instant Coffee Caffeine Content by Serving
Figures are for Instant coffee (generic, prepared).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| 8 oz cup | 237 ml / 8 oz | 62 mg | 26.2 mg | Low |
Source: caffeine figures from USDA FoodData Central, FDC ID 174130 (Beverages, coffee, instant, regular, prepared with water, SR Legacy), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Instant Coffee Compares to Coffee
At 62 mg per 8 oz cup, Instant Coffee delivers about 65% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg). For a wider comparison across drinks, try the caffeine comparison tool or browse the full caffeine database.
When to Stop Drinking Instant Coffee Before Bed
With caffeine's median 5-hour half-life, an 8 oz cup of Instant Coffee (62 mg) needs about 1 h 34 min to fall under 50 mg, the level where most people can fall asleep normally. That puts the last call at 8:15 PM (20:15) for a 10 PM bedtime and 9:15 PM (21:15) for an 11 PM bedtime. Individual half-lives range from roughly 2 to 12 hours, so treat these as a starting point.
The Instant Coffee sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
