Off-Grid Living Calculators
Combine power, water and waste to plan how long you can stay out.
Free off-grid living calculators for off-grid van life
Quick, accurate tools to help you plan, size and budget the off-grid living side of your van conversion. Pick a calculator below to get started.
Off-grid duration
Combine battery, water and waste limits to find max days.
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Resource planner
Set a target days and see what storage you need.
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Days until refill
When fresh water, battery or grey tank runs out next.
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Limiting factor
Which resource will run out first given today's usage.
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Why off-grid van life planning matters
Avoid costly mistakes
Sizing your off-grid living correctly up front saves money, weight and time. Use these calculators before you buy components or commit to a layout.
Built for van life
Every formula is tuned for real campervan and motorhome use cases, with sensible defaults so you can get a useful answer in seconds.