5 water types from one deviceOver 1,200 scientific studies50 years of Enagic traditionMedical certificate from JapanWater without plastic5 water types from one deviceOver 1,200 scientific studies50 years of Enagic traditionMedical certificate from JapanWater without plastic
Educational Article

How much water to drink per day?
Formula, schedule and tips
for Kangen users

Most of us drink too little water — not because we do not want to, but because we do not know when and how much. Learn a simple formula and a ready daily hydration schedule.

Author: Pawel Karpinski | Published: January 15, 2025 | Updated: May 17, 2026

Does it happen that at the end of the day you realize you may have drunk one or two glasses of water? You are not alone. Research indicates that a large portion of adults live in a state of mild dehydration — and are not even aware of it, having grown used to that state.

The problem is that dehydration at even 1–2% of body weight impairs concentration, reduces energy, slows digestion, and negatively affects skin appearance. And many of these symptoms we attribute to fatigue, stress, or poor diet.

The good news is that there is a very simple formula. And a ready schedule you can start following from tomorrow.

Hydration Calculator

Enter your body weight and I will calculate how much water you should drink each day (Dr. Goglia formula: 0.03 L per 1 kg of body weight).

My weight: kg
2.1 liters per day
For physical activity or illness: 3.1 L (formula: 0.044 L × kg)

Dr. Philip L. Goglia Formula — How Much Water per Kilogram

Dr. Philip L. Goglia — a nutrition and metabolism specialist — developed a simple formula that accounts for body weight and physical activity level:

Basic hydration: 0.03 liters × body weight [kg]
Example: a person weighing 70 kg → 70 × 0.03 = 2.1 liters per day

For physical activity or illness: 0.044 liters × body weight [kg]
Example: a 70 kg person during training or illness → 70 × 0.044 = 3.1 liters

Note: food provides the body with approximately 0.95 liters of water per day (vegetables, fruits, soups). This counts toward the total water balance, but does not replace drinking clean water — the cellular hydration mechanism requires liquid water.

Watch out for diuretic beverages

Coffee, tea, carbonated drinks, fruit juices with added sugar, and alcohol are diuretic — meaning the body loses more water through them than it absorbs. If you drink coffee, you should supplement with approximately 150 ml of clean water per cup. Coffee brewed with Kangen Water is less diuretic and tastes better — less bitterness, richer aroma.

Kangen Water Drinking Schedule — Throughout the Day

Just knowing “how much” is not enough — the key is “when”. Water drunk just before a meal dilutes digestive juices, which may slow digestion. Water drunk appropriately before or after eating supports digestion and cellular hydration.

The following schedule is based on optimal hydration guidelines for a weight of 70 kg (2.1 liters per day). Adjust amounts proportionally to your own weight.

Time of Day Amount Kangen pH Why Then?
Right after waking
e.g. 7:00
0.25 L pH 9.5 Rehydration after overnight dehydration. Boosts metabolism and “wakes up” the digestive system.
30 min before breakfast
e.g. 7:30
0.25 L pH 9.5 Preparation of the digestive system. Does not dilute gastric juices.
20 min after breakfast
e.g. 8:20
0.35 L pH 9.0 Fluid replenishment. Supports absorption of nutrients from breakfast.
30 min before lunch
e.g. 12:30
0.25 L pH 9.5 Stomach preparation. Improves digestion of proteins and carbohydrates from lunch.
2 hours after lunch
e.g. 15:00
0.25 L pH 9.5 Midday hydration. Improves concentration and reduces the afternoon energy slump.
30 min before dinner
e.g. 18:30
0.5 L pH 9.0 Largest portion of the day. Reduces appetite and supports digestion of dinner.
2 hours after dinner
e.g. 21:00
0.25 L pH 8.5 Last hydration before sleep. Lower pH — to avoid overloading the kidneys overnight.

Important Note on Starting with Kangen Water

If you are starting your journey with Kangen Water, for the first 1–2 weeks drink pH 8.5, then pH 9.0, and only after another two weeks move to pH 9.5. Too rapid a transition to strongly alkaline water may cause mild detox symptoms (headaches, fatigue). This is normal — the body is cleansing accumulated toxins.

Why Does Kangen Water Hydrate Better?

A question I hear often: “Why do I need an ionizer when I can drink regular tap water?”

Regular water — whether tap or bottled — consists of H₂O molecule clusters of 15–26 molecules. These clusters are too large to efficiently penetrate through cell walls. Cells absorb such water at roughly 15% efficiency.

Kangen Water, through the electrolysis process, forms micro-clusters of just 5–8 molecules. These smaller clusters pass through cell membranes much more easily — absorption efficiency reaches approximately 95%. This means that by drinking Kangen Water, you hydrate your cells 3 times more effectively than with regular mineral water.

Practical effect? Less feeling of “fullness” after drinking water, faster post-workout rehydration, better skin condition, and more energy throughout the day.

Frequently Asked Questions

How much water per kilogram of body weight should I drink daily?
According to Dr. Philip L. Goglia’s formula — 0.03 liters per kilogram of body weight. A person weighing 60 kg should drink 1.8 liters per day, a person at 80 kg — 2.4 liters, and at 100 kg — 3 liters. With physical activity or illness, increase to 0.044 L × kg.
Can I drink Kangen Water without limits?
Kangen Water, like any water, should be consumed in sensible amounts. Excessive water intake (above 5–6 liters per day) can cause hyponatremia — dilution of sodium in the body. Follow the formula based on body weight and listen to your body’s signals. Many Kangen users naturally drink more because the water tastes better — and this typically brings them closer to the optimal amount, not exceeding it.
When to drink Kangen Water before meals — how far in advance?
Optimal is drinking water 20–30 minutes before a meal. In that time the water is absorbed by the intestines and does not dilute gastric juices. Drinking large amounts of water directly with food — regardless of whether it is Kangen Water or regular water — may impair digestion.
Do coffee and tea count toward the daily water intake?
Technically they contain water, but they are diuretic — they cause the kidneys to excrete more fluids than were supplied. A cup of coffee (250 ml) causes a loss of approximately 280–300 ml of water. This is why when calculating daily water intake, we count only clean water. Coffee brewed with Kangen Water tastes better — less bitter, richer aroma — which many users find a pleasant bonus.
What if I forget to drink water according to the schedule?
Nothing bad will happen. The schedule is a guide, not a rigid rule. If you forget your morning glass, make it up during the day. What matters is to consciously pay attention to hydration for the first few weeks — after about a month, regular water drinking becomes a habit and you no longer need reminders. Many people set a phone alarm at the beginning.
How much Kangen Water to drink during a workout?
Before training: drink 0.5 liters of Kangen Water pH 9.5 about 30 minutes before exercise. During training: approximately 150–200 ml every 15–20 minutes. After training: 0.5–0.75 liters within one hour of finishing exercise. Thanks to better cellular absorption, Kangen Water rehydrates after training faster than regular isotonic drinks, while containing no sugar or artificial colorings.

Want to start drinking water that truly hydrates?

A Kangen ionizer is a one-time investment — and better-than-bottled water for years. Contact me, I will tell you about the devices and help you choose the right model for your family.

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