What this site is
S'more's Outdoors builds small, free, browser-based tools for people who camp out of their rigs — RVers, van lifers, truck campers, and weekend car campers. Every tool runs entirely in your browser: no account, no signup, no app to install, and nothing you type is sent to a server. Enter your numbers, get your answer, get back outside. Every tool keeps working offline once you’ve visited it — handy at a signal-less campsite — and each result can be saved as a PDF or shared as a link that reopens the tool with your inputs filled in. Pick US, Metric, or UK Imperial units from the toggle in the header and every tool converts automatically.
The tools
- RV Leveling Block Calculator — match two bubble levels and get exact blocks-per-tire for your rig.
- Can I Tow It? — check a truck-and-trailer combination against every weight rating at once, including the payload limit most buyers miss.
- How Long Can We Boondock? — fresh, grey, and black tank duration for your crew and habits.
- Propane Tank Duration Calculator — honest furnace duty-cycle math for cold-weather camping.
- Will It Trip the Breaker? — shore-power load budgeting and generator sizing with real starting watts.
- Camper Power & Climate Planner — size an EcoFlow battery and air-conditioning kit to your camping style, or rank vehicles by their factory power.
- Tire Pressure by Axle Weight Calculator — match your cold tire pressure to your actual measured axle weight instead of a one-size-fits-all door-jamb number.
- RV Winterization Antifreeze Calculator — an itemized gallons estimate based on your rig size, fixtures, and water heater setup.
- Will My Rig Scrape? — check your rig's departure angle against a steep driveway or campground entrance before you commit.
Why the tools are free
The site is free, and is designed to pay for itself through advertising and affiliate links to camping gear we'd recommend anyway. S'more's Outdoors may include Amazon affiliate links; if you buy through one, we may earn a commission at no extra cost to you. That's the whole business model: useful tools, honest math, and clearly-marked ways the site covers its hosting.
Our approach to accuracy
Every calculator explains its assumptions in a "how the math works" section, and every output is an estimate — rigs, habits, and hardware vary. Where safety is involved (towing weights, propane, electrical loads), we say so plainly and point you to the physical checks that outrank any calculator: the sticker in your door jamb, a CAT scale, a CO detector, your owner's manual. Each tool's disclaimer spells this out.
Suggest a tool or a fix
Spotted a wrong number, or wish a tool existed? We genuinely want to hear it — use the "Got a tool idea?" form on the home page, see the contact page, or use the built-in suggestion form in the leveling calculator to submit vehicle specs for the database.