Build your M1 rig.
Stack your gear, see real weight, stay under payload. 130+ community-verified gear weights — no signup.
How this calculator works
Pick your truck, enter the payload number from your door-jamb sticker, then add gear from a library of 130+ community-verified weights. The gauge shows total weight against your truck's legal limit in real time. Water, passengers, and the M1 base weight are all factored in. Save builds, share them via URL, or export a PDF. The whole thing runs in your browser — nothing is sent to a server unless you sign in to save.
Use it before you order a Tune M1 to confirm your truck has the headroom, after you order to plan your build phase by phase, and after install to track real-world weight as you add and remove gear.
Common questions
How accurate is this payload calculator?
Item weights come from a database of 130+ Tune M1 community-verified items, with manufacturer specs as fallback. Truck payload uses your door-jamb sticker number when you enter it. The math itself is straightforward addition. Accuracy depends on the inputs you give it.
Do I need an account to use the calculator?
No. The full calculator runs in your browser with zero sign-up. Sign-in is optional and only unlocks saved builds and the compare tool.
Does the calculator include the M1 itself?
Yes. Pick mid-size (~400 lb) or full-size (~600 lb) M1 and the base unit weight is included in the total. Factory options like the rooftop tent, awning, solar, and second battery add to the M1 base weight separately.
More on payload limits, ordering the M1, and full FAQ.