All RV & Van Life Tools
RV Battery Bank Calculator
Size a lithium or AGM battery bank for your RV or van from daily power needs
RV Depreciation Calculator
Estimate your RV's current value and see year-by-year depreciation by type, age, and mileage
RV Fuel Cost Calculator
Estimate trip fuel cost for motorhomes, campervans, and vehicles towing trailers
RV Inverter Sizing Calculator
Calculate the right inverter wattage from your RV appliance list with running and surge watts
RV Solar Calculator
Size solar panels and battery bank for your RV or van based on daily power consumption
RV Towing Calculator
Check if your vehicle can safely tow a trailer or RV
RV Trip Budget Calculator
Estimate total RV trip cost covering fuel, campgrounds, food, propane, activities, and extras
RV Water Tank Calculator
Estimate daily water consumption and calculate how long your tank will last for RV and van life
Van Electrical Calculator
Size your battery bank and solar panels for a van conversion with alternator charging
Vehicle Payload Calculator
Calculate remaining payload after accessories, passengers, and cargo
RV & Van Life Calculators on FastTools help RV owners, van lifers, and overlanders plan builds and trips with confidence. Every calculator runs entirely in your browser — no downloads, no signups, no data sent anywhere.
From sizing your solar and battery system to checking towing capacity and payload limits, these free tools give you accurate answers for safe, comfortable travel.
Frequently Asked Questions
Are these RV calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.