Water Intake Calculator vs TDEE & Calorie Calculator
Both tools are 100% free, browser-based, and require no signup. Here is how they differ so you can pick the right one for your task.
Water Intake Calculator
Free water intake calculator. Get your recommended daily water intake in oz and L based on weight, climate, exercise habits, and pregnancy/breastfeeding status — with an hourly drinking schedule. No signup.
Use Water Calculator →TDEE & Calorie Calculator
Free TDEE and calorie calculator. Enter your stats and activity level to get your BMR, maintenance calories, and daily calorie targets for cutting, maintaining, or bulking — with macro breakdowns. No signup.
Use Calorie Calculator →Feature Comparison
| Feature | Water Calculator | Calorie Calculator |
|---|---|---|
| Personalized by weight, climate, and daily exercise | ✓ | — |
| Adjusts for pregnancy and breastfeeding | ✓ | — |
| Output in both ounces and liters | ✓ | — |
| Hourly drinking schedule for waking hours | ✓ | — |
| Metric and imperial inputs | ✓ | — |
| 100% browser-based | ✓ | — |
| BMR using Mifflin-St Jeor equation (most accurate for most adults) | — | ✓ |
| All 5 activity levels shown side-by-side for easy comparison | — | ✓ |
| Goal-specific calorie targets: cut, maintain, or bulk | — | ✓ |
| Macro breakdown (protein, carbs, fat) per goal | — | ✓ |
| Metric (kg/cm) and imperial (lb/ft+in) support | — | ✓ |
| Shareable URL with preset inputs | — | ✓ |
| 100% browser-based — your data never leaves your device | — | ✓ |
| 100% free — no signup, no watermarks | ✓ | ✓ |
| Browser-based — files never uploaded | ✓ | ✓ |
When to Use Each Tool
- →Input your body weight in kg or lb. This is the primary driver of baseline water needs.
- →Choose cool, temperate, or hot to account for sweat and respiratory water losses.
- →Add your average daily exercise duration. The calculator adds fluid for sweat losses.
- →Input your weight, height, age, and sex. Toggle between metric and imperial as needed.
- →Compare all 5 activity levels side-by-side. Select the one that matches your lifestyle.
- →Select Cut, Maintain, or Bulk to see your daily calorie target and macro breakdown for that goal.
Frequently Asked Questions
The National Academies of Sciences recommends about 3.7 liters (125 oz) total water per day for men and 2.7 liters (91 oz) for women — from all beverages and food combined. About 20% of daily water intake comes from food. Needs vary significantly by body size, activity level, climate, and health status. This calculator provides a personalized estimate based on your inputs.
Yes. Sweat losses during moderate exercise range from 0.5 to 2 liters per hour depending on intensity, temperature, and individual sweat rate. A general rule is to add approximately 12 oz (350 mL) of water for every 30 minutes of exercise, or to weigh yourself before and after training — each pound lost represents about 16 oz of fluid that needs to be replaced.
TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a day including physical activity. It is calculated by multiplying your BMR by an activity factor. TDEE is your maintenance calorie level: eating at this number keeps your weight stable.
BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest just to maintain basic functions: breathing, circulation, organ function, and temperature regulation. It represents roughly 60–70% of your total daily calorie expenditure. This calculator uses the Mifflin-St Jeor equation, which research shows is the most accurate prediction formula for most adults.