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Turn services off
Test electricity, gas, mains water, shops and communications independently or as a combined disruption.
Source-led • private by design • no sign-up
How resilient is your home?
Simulate a power cut, water outage, gas interruption, food-supply disruption or communications failure — alone or together. See what becomes unavailable, which supply runs short first, and what closes the gap.
Plan stays on this deviceCountry-specific guidanceExplainable calculations
Not another emergency checklist.
The check models dependencies. A gas boiler may still fail in an electricity outage. Food that needs cooking is less useful if your cooker is unavailable. Phone backup only matters if you can actually recharge devices.
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Find the limiting factor
See which part of your plan is weakest instead of averaging strong and weak categories into a misleading headline.
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Close specific gaps
Get quantities for water, household-days of food and a simple phone-energy budget, plus practical kit gaps.
1Build your scenario
This changes baseline water guidance, emergency references and units shown in the methodology.
Water inputs and outputs convert when you change units. W, Wh and kWh are universal electrical units.
Uses the selected country guidance pack.
Infant feeding needs are flagged for a personal plan rather than guessed.
Enter the total daily water allowance for all pets. The calculator does not guess animal requirements.
2Switch off what fails
Use a preset or build your own combination below.
3What do you already have?
Stored water available for the selected outage.
A household-day means enough suitable food for your whole household for one day.
Optional only. Enter your own planning figure if you use one; Home Resilience Check does not prescribe a personal calorie requirement.
This lets the model stop counting food you cannot prepare when your cooking method is unavailable.
Enter the nominal Wh of power banks or a power station. The result separates phone charging from optional electric-heating demand.
Add devices you plan to run during a power cut. Use each device’s rated input where possible; the site does not assume appliance wattages.
No additional loads added.
If the primary heat source fails, this models an electric backup. When mains electricity is also off, its energy demand is added to stored power.
Use the appliance's rated electrical input, not its heat output. Leave at 0 if unknown.
The calculator uses W × hours/day × outage days. It does not assume a battery can safely run the appliance.
No diagnosis or device details are requested. If selected, the planner flags the need for a professional continuity plan rather than guessing a battery size.
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Built around local guidance.
Preparedness standards differ. Home Resilience Check keeps a separate source pack for each supported country instead of pretending one number applies everywhere.
Common questions
Is limiting resilience a prediction of survival?
No. Limiting resilience and the secondary scenario score are planning outputs based only on the inputs and assumptions shown. Real emergencies vary and official instructions always take priority.
Does the site store my household information?
The calculator saves inputs in your browser so you can return to your plan. The base version does not require an account or send the plan to our server.
Why does the water target change by country?
Because official public guidance differs. We show the relevant country source and calculation instead of hiding the assumption.
Can I use a camping stove indoors during a power cut?
No. Fuel-burning camping stoves, BBQs and portable generators can produce deadly carbon monoxide. Use them only in ways permitted by the manufacturer and official fire-safety guidance.