![Emergency preparedness gear: flashlight, water bottle, emergency case marked [KR], hand-crank radio and a checklist on a map](/_vercel/image?url=_astro%2Fhero.C4dpYiiq.webp&w=1920&q=100&dpl=dpl_DeBeFJQks4j7qLMWMY9GHMaRBWvR)
How prepared are you really?
Interactive calculators instead of another listicle. Work out your power needs, simulate a blackout, plan your supplies. Three minutes, no sign-up, free.
Four calculators for your preparedness
Watt calculator
How large does your power station need to be? Pick your appliances, set the hours, get the Wh, the simultaneous load and the start-up surge.
Blackout simulator
How long would you last in a power outage? 12 questions, your resilience score and a timeline of what fails when.
Solar yield calculator
Real solar yield for 26 cities worldwide by panel size, orientation and tilt, based on PVGIS irradiation data.
Emergency supplies planner
A 72-hour to 10-day supply list adapted to household size, allergies and duration. Printable.
The German edition at krisen-rechner.de additionally has a blackout personality test, product comparisons and guides.