Calculators
Water Intake Calculator
Recommended daily water based on weight and activity, with optional adjustments for weather and life stage. Built by Tolyo.
CalculatorsUpdated
Inputs
= 154.3 lb
Common range: 30–40 ml/kg
Adds ≈ 350 ml per 30 min
Adds a 500 ml buffer
Adds ~300 ml/day
Adds ~700 ml/day
70.0 kg35 ml/kg30 min/day
Daily Target
Milliliters
2,800 ml
Base 2,450 + adj 350
Liters
2.80 L
Ounces (US fl oz)
94.7 oz
Cups (≈240 ml)
11.7 cups
Breakdown
Base (weight × 35 ml/kg)
2,450 ml
Activity
350 ml
Heat / sweating
0 ml
Pregnancy
0 ml
Breastfeeding
0 ml
Notes
- Default guideline is
35 ml/kgbody weight. You can adjust to 30–40 ml/kg. - Adds ~
350 mlper 30 minutes of activity (≈ 12 oz/30 min). - “Hot climate” adds a small buffer; pregnancy (+300 ml) and breastfeeding (+700 ml) are optional add-ons.
- This is a general guide from Tolyo, not medical advice. Individual needs vary—especially with medical conditions.