Hydration Schedule for 90 kg Construction Worker in Heat
A 90 kg outdoor worker in 35°C heat for 8 hours has very high fluid requirements to maintain performance and prevent heat stroke.
How to use this tool
- Enter body weight, hours of activity and temperature in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your target per hour and the full breakdown beneath it.
Outdoor manual laborers face the highest risk of heat-related illness — see the hourly hydration targets for a 90 kg worker in intense summer heat.
Frequently asked questions
- Does temperature affect hydration needs?
- Yes — for every 5 °C above 20 °C this calculator adds 10% to the base requirement to account for sweat losses.
- Should I drink all at once or spread it out?
- Spread intake evenly throughout the day. Drinking too much at once can dilute blood sodium (hyponatremia) in extreme cases.