Safe Caffeine Calculator

    Calculate maximum safe caffeine intake

    kg
    mg

    Formula

    Max = min(400mg, Weight × 6mg/kg)

    FDA recommends max 400mg/day for healthy adults.

    Examples

    70kg adult

    Max ~400mg ≈ 4 coffees.

    Frequently Asked Questions

    About Safe Caffeine

    Calculate your maximum safe daily caffeine intake.