Build your RV, we do the math
Free calculators for your RV or camper van conversion. Calculate wire gauge, batteries, solar panels, weight and more. Supports metric (mm²) and AWG.
Over 2,500+ calculations made
What can you calculate?
Electrical Planner
Plan your complete electrical installation with automatic calculations for cables, fuses, battery and more.
Open tool→Cable calculator
Calculate the minimum cable size based on voltage, current, length and allowed voltage drop.
Open tool→Battery bank calculator
Calculate the required battery bank capacity based on your daily energy consumption.
Open tool→Solar panel calculator
Calculate how many solar panels and what charge controller size you need.
Open tool→Van Advisor
Find out which van suits you best based on your needs and situation.
Open tool→R-value & heat loss calculator
Calculate R-values and total heat loss for your camper insulation build-up.
Open tool→What other builders say
Ok, these are made up. But your experience could be here!
“With the cable and weight tools I could make decisions much faster. No more scattered spreadsheets.”
“Nice that everything is in plain language and works without an account. Quickly recalculate something and get back to building.”
“The tools give me a solid first estimate. For the fine details I still talk to a specialist, exactly as it should be.”
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