Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Daily Water Intake Calculator
Estimate how much water you should drink each day based on body weight and activity level — a far better starting point than the generic "8 glasses a day" rule, which has no scientific basis. The output is total fluid in litres, including water from food (typically about 20% of daily intake) and beverages other than plain water.
Calorie Deficit Calculator
Find the daily calorie target you need to hit to lose weight at a chosen pace — the operational number that turns "I want to lose 5 kg" into "eat 1,950 kcal a day starting Monday." Enter your TDEE (maintenance calories) and the rate at which you want to lose weight, and the calculator returns the daily intake target along with a projected timeline.
Key differences
| Daily Water Intake Calculator | Calorie Deficit Calculator | |
|---|---|---|
| Category | Health | Fitness |
| Inputs required | 2 | 5 |
| Result | Daily Water Intake (liters) | Daily Calorie Target (calories) |
| What it does | Estimate how much water you should drink each day based on body weight and activity level — a far better starting point than the generic "8 glasses a day" rule, which has no scientific basis. The output is total fluid in litres, including water from food (typically about 20% of daily intake) and beverages other than plain water. | Find the daily calorie target you need to hit to lose weight at a chosen pace — the operational number that turns "I want to lose 5 kg" into "eat 1,950 kcal a day starting Monday." Enter your TDEE (maintenance calories) and the rate at which you want to lose weight, and the calculator returns the daily intake target along with a projected timeline. |