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Educational Tools Only
The calculators, reference charts, and printable resources on this site are provided for general RV owner education and planning only. They are not a substitute for manufacturer instructions, product labels, RVIA standards, the National Electrical Code, or inspection by a qualified RV technician or electrician.
RV Electrical Calculators
Ohm's Law, battery runtime, voltage drop, battery state-of-charge, fuse color reference, and common RV electrical loads — all in one place.
Use This Tool →Propane Duration Calculator
Select your tank size, set the gauge level, toggle on the appliances you're running, and get estimated days remaining — instantly.
Use This Tool →Water Tank Sanitization Calculator
Enter your fresh water tank size and get the exact amount of unscented household bleach needed to sanitize your system correctly.
Use This Tool →RV Tire DOT Date Checker
Enter the last four digits of your tire's DOT code to decode the manufacturing date and estimate how old your tires are.
Use This Tool →RV Emergency Info Card Builder
Fill in your RV's key information and print a card to keep on board. Helps campground staff, roadside assistance, and first responders fast.
Use This Tool →RV Maintenance Savings Calculator
See how much you can save over time by staying current on preventive maintenance instead of paying for avoidable repairs.
Use This Tool →RV Recall Lookup
Search the NHTSA database to check if your RV has any open safety recalls by year, make, and model.
Use This Tool →RV Manual Finder
Links to manufacturer owner's manual portals and resources for common RV brands, appliances, and components.
Use This Tool →The DIY RV Maintenance Blueprint
17 field-ready guides with over 80 printable pages of checklists, maintenance sheets, logs, and instructions created by an RVTI Level 4 Master Certified RV Technician. You also receive the bonus 20-page Basic Multimeter Workbook for RV Owners. One complete system for $47.
Don't See What You Need?
New tools are added based on what real RV owners are asking for. If there's a calculator, reference guide, or resource that would help you maintain your RV — send it in.
Tell me the system (electrical, propane, water, tires, A/C, etc.), what the tool should do, and why it would help. Every suggestion is reviewed personally.
Goes directly to Marvin Kennedy — no forms, no bots. marvin@DIYRVTech.com