Free Van Conversion Calculators
Quick, single-purpose calculators for the numbers you need mid-build. For a build where every sheet is linked together automatically, see the full Van Build Tracker.
Solar Panel Sizing Calculator
How many watts of solar you need based on daily power usage.
Battery Bank Sizing Calculator
Size your lithium or AGM battery bank from your appliance load.
Wire Gauge Calculator
Find the correct AWG wire size for your amp draw and run length.
Inverter Sizing Calculator
Size your inverter to your continuous and surge wattage needs.
Water Tank Sizing Calculator
Fresh and grey tank sizing based on trip length.
Weight Distribution Calculator
Check axle weight distribution against GVWR.
Like each of these calculators? It's one tab out of nine.
The full Van Build Tracker links your electrical, budget, weight, and shopping-list sheets together — so changing one number updates your whole build automatically. This calculator alone can't do that.
See the Full Spreadsheet — $39