Heat Hydration Calculator
ONSHORE COLLABORATION CENTRE (OCC)
– NFPS OFFSHORE COMPRESSION COMPLEXES PROJECT COMP2
Workplace heat-stress planning

Heat hydration calculator

Flag-based water and work/rest planning, with personal screening measures.

1. Heat conditions

2. Worker & shift

Enter the time exposed to heat, excluding long meal breaks away from the heat.

3. Personal factors

Your result will appear here

Complete the required fields, then select Calculate result.

Current flag requirement

Orange — Danger

Heat illness likely with prolonged exposure and physical activity.

39°C
Drink
1 cup / 15 min
1 cup = 250 mL
Plan for shift
8.0 L
32 cups across 8 h
Work : rest
30 : 10
minutes

Your work plan

Set a reminder every 15 minutes and take the scheduled rest break.

Drink 250 mL every 15 minDo not wait until thirsty.
30 min work, then 10 min rest12 work/rest cycles in 8 h.
BMI 24.5 · 2% mass = 1.5 LBody-mass watch point, not a drinking target.
Personal screening requiredAge, health and body characteristics can change heat tolerance.

Stop and seek help for warning signs.

Report heat discomfort early. Confusion, collapse, loss of consciousness, seizures, or hot dry skin are emergencies: stop work, begin cooling, and activate the site emergency response.

Required workplace controls

    Heat index & flag reference

    Quick reference from the attached heat-index and alert-category appendices. Use the calculator result and follow the required site controls.

    Green · Low27–31°C · 50:10
    Yellow · Moderate32–38°C · 40:10
    Orange · Danger39–49°C · 30:10
    Dark Red · High50–53°C · 20:10
    Black · Extreme≥54°C · critical work only
    Heat index in degrees Celsius by dry bulb temperature and relative humidity
    Dry bulb °C<30%30%40%50%60%70%80%90%

    Heat index values are in °C. “>54” denotes an extreme / black-flag condition.

    This planning aid preserves the required flag schedule. Heat stress can vary with age, health and body characteristics; the personal fields therefore support screening only and do not override the required flag controls or medical advice. Do not take salt supplements unless advised.

    Developed by - Afsal Asharaf