Last updated: March 2026
Enter your item dimensions and cargo area measurements to see if it fits — trunk, backseat, or roof rack.
Whether an item fits in your car depends on the cargo area dimensions with seats folded, the trunk opening size, and the item's dimensions. Most sedans handle items up to 48" long; SUVs with seats down can fit items up to 72–80" long.
Cargo length (seats folded) vs. item length
Item: Varies — measure your specific item
Space: Sedan trunk: ~42" L × 44" W. Mid-size SUV (seats folded): ~72" L × 44" W
Tip: Fold the rear seats and load diagonally — diagonal loading adds 15–20% to your effective cargo length.
Verdicts are calculated by comparing all 6 item orientations against the space dimensions using verified building code standards. See our methodology
Measurements verified by the ItemFits engineering team · Our methodology
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Most modern cars have a 60/40 or 40/20/40 split-fold rear seat. Folding all sections creates a flat(ish) cargo floor extending from the trunk to the front seats. Check your owner's manual — some seats fold but leave a raised lip or gap between the trunk floor and seat back.
Place the item corner-first into the trunk, then rotate it diagonally across the cargo area. A flat item that won't fit straight in often clears the opening when loaded at a 30 to 45 degree angle. Diagonal length is always longer than either straight dimension.
Roof racks work well for long, flat items like lumber, shelving boards, or mattresses in bags. Check your vehicle's roof load rating (typically 100 to 165 lbs for crossbar racks). Secure items with ratchet straps, not bungee cords, and add a red flag to anything extending past the rear bumper.
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