Build the campervan of your dreams
with our free calculators
Where should you start your conversion?
Don't get lost in the details.
Explore our 4 essential guides to design, budget and build the campervan of your dreams, step by step.
Electricity & Energy
Understand 12V systems, size your battery bank (Lithium vs AGM), calculate your solar panel requirements, and keep your wiring safe.
DVLA & Layout
Pass your DVLA reclassification smoothly. Master fixed ventilation (BS EN 721), insulation choices, and weight distribution (GVW).
Plumbing & Heating
Design your water system, install your gas system to the relevant standards, and choose the right power output for your diesel heater.
Budget & Financing
Discover the true cost of a van conversion from start to finish. Plan your expenses and finance your project without any surprises.
⚡ Electrical Calculators
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Energy Consumption Calculator
Calculate your daily energy needs in watt-hours (fridge, laptop, lights).
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Cable Size Calculator
Determine the correct cable size (mm²) to prevent overheating and reduce the risk of fire.
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MPPT Solar Charge Controller
Choose the right MPPT charge controller based on your solar panels.
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Battery Charging Time Simulator
Calculate exactly how long it will take to recharge your campervan battery.
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Battery Comparison
Should you choose a Lithium or AGM battery for your campervan?
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230V Inverter Calculator
Size your 12/24V to 230V inverter for your campervan.
🛠️ Structure & Budget Calculators
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Budget Simulator
Calculate the total cost of your conversion project and manage your finances.
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Vehicle Weight Calculator
Calculate your vehicle's total weight and make the right choices.
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Materials Calculator –
Insulation & Wood
Calculate the exact surface area of your van and get an accurate shopping list for insulation and panelling.
🔥 Plumbing & Comfort Calculators
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Campervan Water Needs Simulator
Calculate your water consumption and size your water tanks accordingly.
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Campervan Heating Power Calculator
Calculate the exact heating power you need based on your van's volume, insulation and destinations.
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Gas Consumption Calculator
Accurately estimate how long your gas bottle will last in your campervan.
📋 DVLA Classification & Safety Calculators
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Campervan Fixed Ventilation Calculator (BS EN 721)
Calculate required high and low permanent ventilation areas to comply with BS EN 721 standards
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Weight Distribution Calculator (GVW)
Calculate axle load distributions and total payload to ensure legal GVW compliance
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