3 free calculators · No account needed
Wellness & Daily Habit Calculators
Make everyday quantities easier to understand. Explore fluid intake, map an eating window onto your day, or see how a chosen caffeine half-life changes a simple estimate.
Find the right calculator
Water Intake Calculator
Explore a general fluid estimate with adjustable assumptions.
Open calculatorIntermittent Fasting Calculator
Map a fasting duration and eating window onto your day.
Open calculatorCaffeine Calculator
Model caffeine remaining after a single dose.
Open calculatorMake sense of your results
These tools support general planning. Hydration varies with food, heat, exercise, and health; fasting is not appropriate for everyone; caffeine sensitivity and clearance differ widely. A calculated number does not establish that a habit is suitable or safe for you.
Frequently asked questions
Is the water result a prescription?+
No. It is a rough weight-based planning estimate. Food and other drinks contribute fluid, and a clinician's fluid restriction takes priority.
Does an eating window guarantee weight loss?+
No. A schedule only describes timing. Overall intake, food quality, activity, and whether the pattern fits your health and life still matter.
Can a caffeine estimate tell me whether I can sleep?+
No. The model estimates an amount remaining, not alertness or sleep quality. Sensitivity, medications, pregnancy, and individual clearance alter the effects.
Explore more tools
Your numbers are a starting point. Make them a habit.
Use HedgePal to log meals, monitor calories, track macros, and follow your progress — one day at a time.