Work out water requirement for event instantly with clear inputs, formula shown and shareable results.
Water use is attendees times hours times the hourly rate, doubled for hot weather or physically active events, and tap provision assumes about six litres a minute per outlet. Free water provision is a licensing requirement at most alcohol-serving events, and the tap count matters because queues rather than supply are the usual failure.
Water needed
litres = attendees x hours x litres per person per hour x weather multiplier
litres = attendees x hours x litres per person per hour x weather multiplier. Water use is attendees times hours times the hourly rate, doubled for hot weather or physically active events, and tap provision assumes about six litres a minute per outlet.
Free water provision is a licensing requirement at most alcohol-serving events, and the tap count matters because queues rather than supply are the usual failure.
Enter attendees, event duration, drinking water per person per hour, hot weather or active event. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.