Do coffee or tea count?
Most non-alcoholic beverages contribute toward hydration, but caffeine and alcohol can increase the total you need—sip extra water alongside them.
Step-by-step walkthrough
Water Intake Calculator Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- water intake
- hydration
- daily water
Detailed procedure
Step 1
Select metric or imperial units and enter your current weight.
Step 2
Provide the average number of active minutes per day and choose the climate you live or train in.
Step 3
Optional: tag pregnancy or breastfeeding to include those hydration needs, then copy the liters/cups output.
Teaching & troubleshooting tips
Is this medical advice?
No. It’s an educational rule of thumb. Follow guidance from your doctor if you have kidney, cardiac, or pregnancy-related fluid restrictions.