Free Water Calculator

Water Intake

Daily fluid goal by weight, activity & climate

✓ Free ✓ No Sign Up

Gender

Weight (kg)

Activity level

Climate / place

Drink about this much fluid daily

—

Base (from body weight)—

Activity extra—

Climate extra—

Special condition—

Glasses (250 ml each)—

Approx. 1 L bottles—

Based on EFSA / IOM style guidance: about 30–35 ml per kg body weight for fluids, plus extras for exercise and heat. Food also provides some water (~20%). Nepal heatwave advice often suggests 3–4 L in Terai summer. Not medical advice — ill people, kidney disease, or heart conditions need a doctor’s guidance.