READYHOMEPLAN
Calculators
Choose a calculator and get a quick planning estimate for water storage, backup power runtime, phone charging, or pantry calories.
Water
Water Storage Calculator
Estimate total water for people × days (optional pet add-on) and see quick container counts.
Total water
— L (≈ — gal)
Containers (quick)
20L: — · 10L: — · 5L: — · 1L: —
Planning estimate only. Store safely, rotate, and keep containers food-grade.
Read the full water storage guide →
Power
Backup Runtime Planner
Estimate runtime from battery capacity (Wh) and total load (W) (includes usable fraction + efficiency).
Usable energy
— Wh
Estimated runtime
—
Tip: Prioritize low-watt essentials (router, lights, phone charging).
Open blackout plan →
Phones
Phone Charging Estimator
Estimate how many full phone charges you get from a power bank (includes typical conversion losses).
Estimated full charges
—
Approx usable energy
— Wh
Power banks are rated at cell voltage (~3.7V). USB conversion reduces usable energy.
Lighting & batteries topic →
Food
Pantry Calories Planner
Estimate total calories for a short emergency pantry plan. Optional “base staple” (kg) estimate included.
Total calories
— kcal
Staple estimate
— kg (for chosen share)
Good balance: staples + proteins + fats + easy meals. Don’t forget hydration.
Open pantry topic →