Roof Box Fit Planner
Check if a specific cargo roof box will fit on your car's crossbars without hitting the rear hatch when opened.
Your Vehicle Measurements
Distance from the center of the front crossbar to the center of the rear crossbar.
Open your rear hatch fully. Measure from the center of the front crossbar to the nearest point of the hatch.
Roof Box Specs
Check the manufacturer's fit guide for this box model.
Live result
This roof box should fit
Step by step
How to use this tool
- 1
Enter your crossbar spread measured from the center of one bar to the center of the other.
- 2
Enter the distance from the front bar to the open rear hatch.
- 3
Enter the roof box manufacturer's required hatch clearance and min/max crossbar spread.
- 4
Review whether the box can clamp to your bars and clear the hatch.
Decision context
What this calculator helps you decide
Use Roof Box Fit Planner when you need a quick, structured answer before you spend money, approve work, prepare a trip, compare options, or share information with a buyer, seller, shop, lender, or insurer. Enter the inputs you already know, review the result, then use the assumptions and limits below to decide what to check next.
Inputs and outputs
Start with the inputs that most affect this decision: Your Crossbar Spread, Your Front Bar to Hatch Distance, Box Minimum Spread, Box Required Clearance. The output is meant to make the next step easier to compare, not to replace a written quote, inspection, policy document, loan disclosure, or local rule.
The main outputs are Crossbar Fit Result, Hatch Clearance Result. If one input is uncertain, change that value and compare the result again before treating a single estimate as final.
Best-use cases
This page is built around the search intent: check roof box fitment, will a thule box fit my car, roof box hatch clearance calculator. It is most useful when you want to narrow a decision, prepare better questions, or avoid missing a cost, risk, fitment issue, paperwork step, or ownership detail.
Keep the assumptions visible while using the result. If your vehicle, location, driving pattern, quote, loan, insurance policy, or listing situation is unusual, use this as a planning screen and verify the final decision with the relevant document, professional, or local requirement.