Skip to main content

Water Intake Calculator

Health & Body

Recommended daily water by weight and activity

Quick Answer

Water Intake Calculator: Recommended daily water by weight and activity. Water Intake Calculator uses standard health formulas to compute accurate results instantly.

Daily water target

2.5 L

≈ 10 cups of 250 ml

Base (33ml/kg)2145 ml
Exercise ++350 ml
From food (~20%)499 ml
To drink1996 ml

Water source split

Drinking water1,996ml (80.0%)Food moisture499ml (20.0%)

Steps

  1. 1Base = 65 kg × 33 ml = 2145 ml
  2. 2Exercise: 30 min ÷ 30 × 350 = +350 ml
  3. 3Total = 2495 ml ≈ 10.0 cups

Suggested schedule

TimeAmount
Morning399 ml
Late morning399 ml
Around lunch399 ml
Afternoon399 ml
Around dinner299 ml
Evening100 ml

💡 Urine color is the simplest gauge: pale straw = well hydrated; dark yellow = drink more. Avoid chugging >1L at once — spread intake through the day. Coffee and tea count toward fluids but mildly increase loss.

Was this tool helpful?

How to Use

  1. Enter body metrics: fill height, weight, age etc. as prompted by the Water Intake Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

  • Water Intake Calculator is a free online health tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Recommended daily water by weight and activity.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Water Intake Calculator formula

Water Intake Calculator uses standard health formulas to compute accurate results instantly.

FAQ

How do I use the Water Intake Calculator?
Open the page and fill in the input fields — results update automatically. Recommended daily water by weight and activity.
Are the results accurate?
Results follow published international standards (WHO, ACE, IOM) and are for reference only.
Can this replace medical advice?
No. Always consult a qualified healthcare professional for health decisions.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on all devices.

Related Tools

Related Guides

Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Water Intake Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/water

Results provided by this tool are for reference only and do not constitute professional advice.