How much water does your emergency kit need?
The simple UK household calculation.
If drinking-water supplies are disrupted, a few bottles in the cupboard can make a real difference. UK guidance suggests allowing approximately three litres of drinking water per person per day. That's a baseline, not a rigid limit.
Multiply by three
For 72 hours, allow around nine litres per person for drinking: 18 litres for two people, 27 for three and 36 for four. Add more for cooking, washing, warm weather, health needs and pets. Household needs differ.
Keep it safe
Store sealed bottled water or use clean, food-grade containers and follow their care instructions. Keep supplies away from heat and sunlight and refresh them as advised. Never reuse containers that held chemicals.
Don't overcomplicate it
Add a little during normal shopping and use our free household calculator to work out your starting point. For wider advice visit Be Ready.
Information is general preparedness guidance. During emergencies, follow official alerts and the instructions of emergency services.
← All guides