Is 400 mg too much for me?

If you feel jittery, get palpitations or disrupted sleep on 2 cups of coffee, you are probably in the low-sensitivity band and should keep it lower.

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Caffeine Safe Limit Calculator

The 400 mg/day adult ceiling is a population guideline. Use your weight to estimate a more personal upper bound.

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Sensitivity

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Is 400 mg too much for me?: If you feel jittery, get palpitations or disrupted sleep on 2 cups of coffee, you are probably in the low-sensitivity band and should keep it lower.