Free RV tools, shipped one at a time
Every tool is free, no paywall. Each one says where its numbers come from, and what people actually use decides what gets built next.
Weight & Distribution Calculator
Runs in your browserTowing capacity vs the 80% rule, door-jamb payload, tongue or pin load, trailer GVWR, per-axle estimates. Type once, everything recomputes, the answer to "can my truck actually tow this?" in three fields.
Estimates only. Always confirm your real load at a certified scale.
Example output. Yours is computed from your inputs, live.
Tire Date Code Decoder
Runs in your browserEvery tire carries the week and year it was made in the last four digits of its DOT code. Type those four digits and read the date and the age off the sidewall, with the rule quoted from NHTSA rather than paraphrased.
Reads the date only. It cannot judge whether a tire is safe.
Example output. Your tire's own four digits give yours.
Next tools in the pipeline
All free when they land. What ships next comes from what people actually search for.
Campground Finder
Find sites that fit your RV, length, hookups, and pet rules.
Dump & Water Stops
Fresh water, sewer dump, potable fill, located free, seeded from public data, kept current by RVers.
RV-Aware GPS
Navigation that thinks like an RV: low bridges, tight turnarounds, height and weight limits, the trucker tools, free for RVers.
Floor Planner
Design and rearrange your RV's layout before you build. Move walls, find the fit, plan the load.
Roof Snow Load Calculator
Runs in your browserSnow is water with air in it, so what it weighs is what the water in it weighs. Enter the water equivalent and your roof pitch and this gives you the load in pounds per square foot, by the National Weather Service's own method, and compares it with a rating if your maker publishes one.
A rough estimate by the Weather Service's own description. It is not a structural assessment.
The Weather Service's own worked example.