Compare Ford F-150 5.5-foot, 6.5-foot, and 8-foot bed dimensions, cargo volume, units, recent cab pairings, and flat cargo fit.
Calculator
Published box dimensions are nominal reference values. Cargo fit checks a flat rectangle against floor length and the 50.6-inch minimum width between wheelhouses; it does not model height, wheel-well shape, tie-downs, liners, or an open tailgate.
F-150 Bed Size Results
Compare the selected box dimensions, cargo fit, and all three published bed sizes.
Bed Length Comparison
Selected Bed Details
| Measurement | Value | Note |
|---|
Ford F-150 bed dimensions at a glance
The F-150 is commonly offered with nominal 5.5-foot, 6.5-foot, and 8-foot Styleside boxes, but those names are rounded categories rather than exact inside measurements. Ford's published technical specifications list inside floor lengths of 67.1 inches, 78.9 inches, and 97.6 inches. All three reference boxes are 50.6 inches wide between the wheelhouses and 21.4 inches high.
| Nominal bed | Inside floor length | Width between wheelhouses | Inside height | Cargo volume |
|---|---|---|---|---|
| 5.5 ft | 67.1 in | 50.6 in | 21.4 in | 52.8 cu ft |
| 6.5 ft | 78.9 in | 50.6 in | 21.4 in | 62.3 cu ft |
| 8 ft | 97.6 in | 50.6 in | 21.4 in | 77.4 cu ft |
How to use the F-150 bed size tool
Select the nominal box size to see its exact reference length, width between the wheelhouses, height, cargo volume, and common recent cab pairing. Change the display unit to feet or centimeters when comparing storage systems or products with non-inch specifications.
The optional cargo dimensions answer a narrower question: whether a flat rectangular item fits inside the floor-length-by-wheelhouse-width rectangle with the tailgate closed. The tool also tests a 90-degree rotation. A positive result does not prove real-world fit because the item may be too tall, irregular, unable to pass through the opening, or obstructed by a liner, divider, tie-down, toolbox, or other accessory.
Official Ford specification sources
The exact length, 50.6-inch wheelhouse width, 21.4-inch height, and cargo-volume figures come from Ford's 2021 F-150 technical specifications. Ford's current 2026 F-150 model page continues to list 5.5-, 6.5-, and 8-foot bed choices and a 50.6-inch bed width.
Specifications can change by model year, market, trim, cab, and special model. Treat these as published current-generation reference dimensions, then verify the exact truck using its window sticker, order guide, owner's information, or a direct measurement before ordering a fitted tonneau cover, cap, drawer, liner, tank, rack, or slide.
Which cab comes with each bed length?
Ford's 2025 US order guide shows the 5.5-foot box with SuperCrew, the 6.5-foot box with Regular Cab, SuperCab, and SuperCrew, and the 8-foot box with Regular Cab in the listed XL configurations. Availability still depends on trim, drivetrain, wheelbase, fleet status, and model year; the calculator summarizes the common pairing rather than promising that every trim can be ordered that way.
Will a 4-by-8 sheet fit in an F-150 bed?
A standard 4-by-8 sheet is nominally 48 by 96 inches. Its 48-inch width is less than the 50.6-inch space between the wheelhouses. The 8-foot bed's 97.6-inch floor length exceeds 96 inches, so a nominal sheet fits within this simplified closed-tailgate rectangle. The 5.5- and 6.5-foot boxes are shorter than 96 inches, so the same sheet does not fit flat within the closed floor rectangle.
This geometric result is not a loading recommendation. Actual sheet dimensions, stacking, bedliner thickness, tailgate geometry, load support, overhang laws, visibility, and securement requirements matter. Measure the item and truck, support the load properly, and follow local rules.
Bed length versus cargo volume
The 6.5-foot box adds 11.8 inches of floor length and 9.5 cubic feet of published volume over the 5.5-foot box. The 8-foot box adds 18.7 inches and 15.1 cubic feet over the 6.5-foot box. Relative to the 5.5-foot box, the 8-foot box provides 30.5 more inches of floor length and 24.6 more cubic feet of published volume.
Cargo volume is a three-dimensional capacity measured by Ford; it is not simply floor length times 50.6 inches times height because the box is wider than the wheelhouse gap in other areas and has non-rectangular geometry. Use the published volume for capacity comparison and the minimum wheelhouse width for conservative flat-floor fit screening.
Nominal feet versus exact inches
Multiplying the nominal names by 12 gives 66, 78, and 96 inches, but Ford's inside floor lengths are 67.1, 78.9, and 97.6 inches. Product listings often use the nominal bed class because it is easier to recognize. Exact-fit accessories use model year, cab, box, and sometimes build-date details; a product labeled only "6.5-foot bed" is not automatically compatible.
Related F-150 planning tools
Bed dimensions describe available space, not allowable weight. Use the payload capacity calculator with the specific truck's door-jamb label, the truck payload calculator for a GVWR-based estimate, and the towing capacity calculator when a trailer is involved.
Frequently asked questions
How wide is an F-150 bed between the wheel wells?
Ford's referenced technical specifications list 50.6 inches between the wheelhouses for the 5.5-, 6.5-, and 8-foot Styleside boxes.
How long is the F-150 5.5-foot bed?
The published inside floor length is 67.1 inches, or about 5.59 feet.
How long is the F-150 6.5-foot bed?
The published inside floor length is 78.9 inches, or about 6.58 feet.
How long is the F-150 8-foot bed?
The published inside floor length is 97.6 inches, or about 8.13 feet.
Are these outside or inside dimensions?
The tool uses Ford's inside floor length, width between wheelhouses, and inside height. Exterior box and overall truck dimensions are different.
Can I use these numbers to buy a tonneau cover?
Use them to identify the likely bed class, then confirm the exact year, cab, box, trim, and product fitment before ordering.