Daily Water Intake: 5 Mistakes to Avoid
A rough guide to daily fluid needs in Singapore's hot, humid climate. The maths is not complicated, but a handful of errors come up again and again in this and related health & fitness calculations. Here is what to watch for.
Research has shown that Asians tend to develop conditions such as type 2 diabetes and heart disease at lower body weights than Europeans. That is why the Health Promotion Board recommends lower BMI cut-offs for Singaporeans, with 23 marking the start of moderate risk.
Singapore's tropical climate means you lose more fluid through sweat, even when you are not exercising. Thirst, urine colour and how you feel are good guides, and needs rise during outdoor activity or heat waves.
1. Treating estimates as exact
Formulas such as BMR or body fat are population estimates with real margins of error.
2. Measuring inconsistently
Tape measurements change with posture and breathing; measure the same way each time.
3. Cutting calories too aggressively
Very large deficits are hard to sustain and can lead to muscle loss.
4. Mixing units
Entering pounds or inches into a metric formula gives nonsense results.
5. Using international BMI cut-offs for Asians
HPB recommends lower cut-offs because risks rise at lower BMIs in Asian populations.
The correct method
About 33 ml per kg of body weight plus 350 ml per 30 minutes of exercise.
For example, with these inputs:
- Weight (kg): 65
- Exercise minutes a day: 30
the calculator returns:
- Suggested water intake: 2.50 litres
Related calculations
- Calories Burned Calculator: Estimates calories burned with MET values.
- BMI Calculator (Asian Cut-offs): Singapore's Health Promotion Board uses lower BMI cut-offs for Asians because health risks rise at lower BMIs.
- BMI Calculator (WHO): Calculates BMI with the international WHO categories.
- BMR Calculator: Estimates calories your body burns at rest.
The Daily Water Intake Calculator applies the formula consistently, so it is a quick way to double-check your own working.
Run your own numbers: Daily Water Intake Calculator