Free Sleep Tool
Caffeine & Sleep Calculator
Find out what time to stop drinking caffeine so it doesn’t ruin your sleep tonight — personalised to what you’ve had today
🌙 Your Target Bedtime
☕ What have you had today?
Caffeine in your system at bedtime
0 mg
Recommended limit for good sleep: below 50 mg
✅ Safe for sleep
Last caffeine recommended by:
—
📊 Caffeine Decay Curve
Caffeine level (mg)
Drink marker
Sleep-safe zone (<50 mg)
Disrupts sleep (>100 mg)
💡 Personalised Tips
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Want to improve your sleep quality and energy levels?
Book a Consultation with Dr Kushnir* This calculator is an educational tool and not a substitute for medical advice. Based on clinical research on caffeine’s half-life (approximately 5–6 hours). Individual metabolism varies.