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WATER / UK PRACTICAL GUIDE / REVIEWED 30 OCT 2026

72-HOUR WATER CALCULATOR UK

Current UK Be Ready guidance recommends keeping 3 litres of drinking water per person per day for 3 days. That is 9 litres per person as a drinking-water baseline.

FREE / NEXT STEP

72-HOUR WATER CALCULATOR

Calculate the current UK three-day drinking-water baseline for your household, then note extra needs separately.

RUN THE FREE CHECK

WHAT TO DO WITH THIS

This baseline is not the same as total household water use. Cooking, washing, infant feeding, medical devices and pets can require additional water, so plan those needs separately.

LIMITS / SAFETY

Build supplies gradually, store them safely and rotate them rather than treating preparedness as a one-off stockpile.

COMPLETE THE DECISION

READY/03 — WATER / 72 HOURS

Use the paid plan only when you want the decisions written into a printable, offline system.

GET PLAN — £4.99SEE WHAT'S INSIDE
SOURCES / CURRENT UK GUIDANCEhttps://beready.campaign.gov.uk/be-informed-about-hazards/water-supply-interruptions-or-outages/https://beready.campaign.gov.uk/be-ready-for-emergencies/