About Caffeine Timing

The Problem

Most people know that coffee keeps you awake, but very few understand the Half-Life of caffeine. Drinking a double espresso at 4 PM means half of that caffeine is still blocking your sleep receptors at 10 PM.

This knowledge gap leads to millions of people struggling with sleep quality, not realizing that their afternoon coffee is the culprit. They blame stress, screens, or age—when the real issue is timing.

Our Mission

Caffeine Timing was created to bridge the gap between "I'm tired" and "I'm caffeinated."

We built this tool to provide a simple, data-driven way to calculate your personal caffeine cutoff time. No guesswork. No confusion. Just science-backed calculations that help you make informed decisions about when to enjoy your last cup of coffee.

How It Works

Our calculator uses the standard pharmacokinetic formula for caffeine decay. By inputting your drink type and target bedtime, we help you visualize exactly how much stimulant is in your system when your head hits the pillow.

The science is based on the well-established 5-hour half-life of caffeine in healthy adults. This means:

• After 5 hours, 50% of caffeine remains
• After 10 hours, 25% remains
• After 15 hours, 12.5% remains

Our tool makes this complex calculation simple and visual, so you can make informed decisions about your caffeine consumption.

The Team

Founded by a team of developers and sleep enthusiasts, Caffeine Timing is dedicated to helping the world wake up refreshed.

We combine our passion for sleep science with modern web technology to create tools that make complex health information accessible to everyone. Our mission is to empower people with knowledge, not just data.