Bunk LedgerInverter and battery runtime
Estimate how long a battery can feed an inverter load, and what continuous wattage to shop for.
StartFree tools
Each calculator is a short wizard. The formula and the assumptions sit underneath, so the result is something you can rerun rather than a number from nowhere.
12V fridge overnight draw
Turn a fridge's average amp draw into amp-hours for a night, and compare that with the battery you actually have.
StartTruck mattress size checker
Enter the sleeper bunk you measured and see which standard mattress sizes drop in, which are tight, and which do not fit.
StartFuel cost for a trip
Estimate fuel cost from the distance, the miles per gallon, the price you type, and tolls. DEF and idle fuel stay out.
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