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The Body Clock
THE
BODY CLOCK
Free tool

Your Best Time to Do Everything

Every tracker tells you what already happened. This tells you what to do next — the right time to drink coffee, train, eat, and sleep, timed to your body. No app, no wearable.

Your timeline updates instantly. No app, no tracker — just your rhythm.

Your free snapshot

Morning water

7:05 AM

Drink a glass of water as soon as you are up. You lose fluid overnight, and rehydrating now sharpens alertness before your first coffee.

Morning light

7:15 AM

Get 10 minutes of outdoor light. It anchors your entire body clock and sets up a sharper, more energized day.

First coffee

8:30 AM

Wait about 90 minutes. Cortisol is still high right after you wake — coffee now means steadier energy and no early crash.

Deep-focus window

9:30 AM – 11:30 AM

Your sharpest cognitive window. Protect it for your hardest, highest-value work — not email or meetings.

Ideal nap window

2:00 PM – 2:25 PM

Your natural early-afternoon dip. A short ~20-minute nap here recharges you without grogginess — and it is early enough that it will not steal from tonight’s sleep.

🔒 13 more perfectly-timed windows

Your last coffee, peak workout window, when to stop eating, magnesium timing, screens-off, and your ideal sleep onset — all timed to your wake-up.

Free. Your complete timeline + a weekly rhythm tip. Unsubscribe anytime.

Why this beats a generic schedule

"Drink coffee in the morning" is advice everyone has. The problem is that when in your morning matters enormously — and it depends on when you actually wake up. The same is true for training, meals, and your last cup of coffee. This tool anchors each window to your real wake time, so the timing is yours, not a one-size-fits-all chart.

It is built on the same circadian science behind the 2017 Nobel Prize in Medicine — the discovery that every cell in your body runs on a 24-hour clock that controls when you focus, digest, build muscle, and sleep.

Frequently asked questions

What is the best time to drink coffee?

About 90 minutes after you wake up. Cortisol (your natural alertness hormone) is still elevated for the first hour or so after waking, so coffee right away is partly wasted and can lead to an earlier crash. Waiting ~90 minutes gives you steadier energy. Enter your wake time above for your exact time.

When should I stop drinking coffee?

Caffeine has a half-life of roughly 6 hours, so a coffee in the afternoon can still be a quarter-strength at bedtime — fragmenting deep sleep even if you fall asleep fine. As a rule, your last coffee should be about 8–9 hours before your target bedtime. The tool calculates this from your wake time.

What is the best time to work out?

For most people, late afternoon to early evening — your core body temperature, muscle power, and reaction time all peak then, which means better performance and lower injury risk. The exact window depends on your wake time and chronotype.

How is this different from a sleep tracker?

Trackers like WHOOP, Oura, and sleep apps tell you what already happened. The Body Clock tells you what to do next — the specific times to eat, move, focus, and rest for your rhythm. It is prescriptive, not just descriptive.

Best time to…