Guides
How to Measure Your Truck Bed
Four minutes that prevent the most common return in this category. Measure the bed, not the badge.
By Michael W. · Published October 5, 2026
Cover & Cargo earns a commission from qualifying purchases made through links on this page, at no extra cost to you. It does not change what we recommend or the order we rank things in — here is how we choose and here is the full disclosure.
What this is based on: published manufacturer specifications and warranty terms, cited on each cover; independent published tests where they exist, named and linked; and verifiable owner reports of specific failure modes. We have not fitted these covers to a truck, we do not run a test lab, and we do not claim a test we did not run. Where the evidence for a cover is thin, the page says it is thin.
Quick picks
| # | Cover | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  BAKFlip MX4The default hard folding cover, and the one most buyers should start from: 400 lb rating, a 5-year warranty, 100 percent bed access, and a seal design the maker revised specifically to stop bulkhead seepage. | Best overall | 8.4out of 10 | |
| 2 |  TruXedo TruXportThe roll-up most people mean when they say roll-up: vinyl over a clamp-on frame, 30 minutes to fit, 5-year warranty, rolls forward for 100 percent bed access with nothing left in the bed. | Best value | 7.6out of 10 | |
| 3 |  Extang Solid Fold ALXThe highest published load rating in this roundup at 600 lb, on inch-thick TPO panels in an aluminum frame, with tool-free clamps and a five-year warranty. | Highest rating | 8.3out of 10 |
Scores are our own editorial judgment on the rubric published at our editorial policy page, weighing security, weather sealing, bed access, install effort, durability, value. They are read off published specifications, warranty terms and sourced owner reports. They are not measurements we took, and they are not user ratings.
The short answer
Measure the inside of the bed, along the floor, from the bulkhead to the inside face of the closed tailgate. Write the number down.
Do not use the badge, the brochure name, or what the dealer called it. Those are nominal; the fitment chart is keyed to the real dimension.
Check for bed options that change the part number — RamBox, factory rail systems, utility tracks.
The measurement
- Close the tailgate. The measurement is to the inside face of the closed tailgate, not to the hinge and not with it down.
- Clear the bed floor. A bed liner, a mat or a loose tool will change your reading or stop the tape lying flat.
- Run the tape along the bed floor, front to back, from where the floor meets the bulkhead to where it meets the closed tailgate. Keep it straight and against the floor rather than angled across the bed.
- Read it in inches and write it down. This is the figure every manufacturer's fitment chart is keyed to.
- Measure the usable width too if you have any bed option that intrudes — wall-mounted storage, a toolbox, factory rails. Inner face of one bed wall to the inner face of the other.
The three mistakes
1. Trusting the badge
Bed lengths are marketed in round numbers — “5.5 foot”, “6 foot”, “8 foot” — and the actual inside measurement is rarely that exact figure. An F-150's nominal 5.5 ft bed measures around 67 inches inside; a 6.5 ft around 79; an 8 ft around 97. Those are the numbers that distinguish them.
Cab style is a hint, not proof. Crew cabs usually have the short bed. Usually.
2. Measuring with the tailgate down
An open tailgate adds roughly its own length to your reading, and the cover does not cover it. Close the tailgate first.
3. Ignoring the options
Some bed options change the cover part number entirely and no length measurement will reveal them:
- RamBox on a Ram narrows the usable width between the rails and requires a different cover. The RamBox page.
- Factory bed rails on a Silverado or Sierra sit where a clamp-on cover clamps. Some covers clamp over, some need them removed, some are not offered.
- Utility track systems — Toyota's deck rails, Nissan's Utili-track — raise the same question.
Reference figures
| Truck and bed | Approximate inside length |
|---|---|
| F-150 5.5 ft | Around 67 in |
| F-150 6.5 ft | Around 79 in |
| F-150 8 ft | Around 97 in |
| Ram 1500 5'7" | Around 67 in |
| Ram 1500 6'4" | Around 76 in |
| Silverado 1500 5'8" | Around 70 in |
| Tacoma 5 ft | Around 60 in |
| Tacoma 6 ft | Around 73 in |
These are approximate inside measurements to help you sanity-check your own reading, not a substitute for taking it. If your measurement sits between two figures, measure again.
What to give the retailer
Your measured inside bed length in inches, your truck's make, model and year, and the answer to any option question the fitment selector asks — RamBox, factory rails, utility track. The selector is the authority at checkout, and it only works if you feed it the right numbers.
Once you have the number
Go to your truck's page, which lists the covers sold for your bed and the fitment traps specific to it. Or start from the cover type if you have not settled that yet.
The picks in detail
#1 · Most truck owners
BAKFlip MX4
BAK Industries · Hard folding
The default hard folding cover, and the one most buyers should start from: 400 lb rating, a 5-year warranty, 100 percent bed access, and a seal design the maker revised specifically to stop bulkhead seepage.
What it does well
- 400 lb evenly distributed rating is at the top of the folding class, and it is published rather than implied
- The revised EPDM perimeter seal plus drain system targets the bulkhead, which is where folding covers actually leak
- Folds flat against the cab for full bed access without taking the cover off the truck
- 5-year warranty is longer than most hard folding covers in the same bracket
Where it gives way
- Folded open it occupies roughly the front third of the bed — the published 100 percent access means the bed is reachable, not that the space is free
- Textured black finish shows water spotting on dark trucks more than a gloss panel does
- No published figure for cover weight, so the one-person-install question is unanswered by the maker
Skip it if: Anyone who needs the bed open and covered at the same time all day. Folded against the cab it eats the front third of the bed, and nothing folding escapes that.
| Construction | Multi-layer aluminum, polymer-reinforced top panels |
|---|---|
| Finish | Textured matte black |
| Load rating | 400 lb, evenly distributed |
| Warranty | 5 years |
| Stated install time | 30 minutes or less |
| Drilling | None required on most trucks |
| Bed access | 100 percent — folds flush against the cab |
| Sealing | EPDM perimeter seals, integrated drainage |
Specifications read from RealTruck — BAKFlip MX4 (Gen 3) published specifications.
#ad We show no price until we can verify one. How this is funded
#2 · Full bed access on a budget
TruXedo TruXport
TruXedo · Roll-up (soft)
The roll-up most people mean when they say roll-up: vinyl over a clamp-on frame, 30 minutes to fit, 5-year warranty, rolls forward for 100 percent bed access with nothing left in the bed.
What it does well
- Rolls completely forward, so full bed access costs you nothing but the roll itself
- 5-year warranty on a soft cover at this price is genuinely good
- Lightest install in the registry — 30 minutes, no tools beyond what is in the box
Where it gives way
- Vinyl offers no meaningful theft resistance; treat it as a weather and privacy cover
- Rolled to the bulkhead it sits proud of the rails, so it is visible and in the way of a full-height load
- Vinyl needs a UV protectant on a schedule or it chalks
Skip it if: Security. A soft vinyl cover keeps weather and eyes off your cargo; it does not stop a knife.
| Construction | Vinyl over a clamp-on aluminum frame |
|---|---|
| Finish | Vinyl grain |
| Warranty | 5 years |
| Stated install time | 30 minutes or less |
| Drilling | None — no cutting, drilling or modifications |
| Bed access | 100 percent — rolls forward to the cab |
| Mounting | Clamp-on, vehicle-specific hardware included |
Specifications read from RealTruck — TruXedo TruXport (Gen 2) published specifications.
#ad We show no price until we can verify one. How this is funded
#3 · Carrying load on top of the cover
Extang Solid Fold ALX
Extang · Hard folding
The highest published load rating in this roundup at 600 lb, on inch-thick TPO panels in an aluminum frame, with tool-free clamps and a five-year warranty.
What it does well
- 600 lb published rating is the highest here by 200 lb — the one cover in the group you can actually plan to load
- Inch-thick TPO panels are substantially more rigid than a thin aluminum skin
- Tool-free clamps, and removable without tools when you need the whole bed
Where it gives way
- Folded, access is two-thirds — the full-bed answer is taking the cover off, not folding it further
- Panel thickness means more weight to lift off than a thin folding cover
- Warranty text covers rails, aluminum, clamps, bows and hardware; the panel itself is described separately
Skip it if: Anyone who needs more than two-thirds of the bed open at once without pulling the cover off the truck.
| Construction | 1-inch EnduraShield TPO panels, aircraft-grade aluminum frame |
|---|---|
| Finish | Textured matte black |
| Load rating | 600 lb, evenly distributed |
| Warranty | 5-year limited on rails, aluminum, clamps, bows and hardware |
| Stated install time | Less than 1 hour, Level 1 difficulty |
| Drilling | None — tool-free Jaw-Grip clamps |
| Bed access | Two-thirds when folded; removable without tools for full access |
| Sealing | Triple-fin perimeter seals |
Specifications read from RealTruck — Extang Solid Fold ALX published specifications.
#ad We show no price until we can verify one. How this is funded
Common questions
How do you measure a truck bed for a tonneau cover?
Close the tailgate, clear the bed floor, and run a tape along the floor from where it meets the bulkhead to where it meets the inside face of the closed tailgate. Read it in inches. That is the figure every manufacturer's fitment chart is keyed to.
Do I measure the truck bed with the tailgate up or down?
Up. The measurement is to the inside face of the closed tailgate. Measuring with it down adds roughly its own length to your reading, and the cover does not extend over an open tailgate.
Is the bed length on my truck's badge accurate?
It is nominal. Bed lengths are marketed in round numbers and the actual inside measurement is rarely that exact figure — an F-150's nominal 5.5 ft bed is around 67 inches inside. Measure rather than relying on the badge, and treat cab style as a hint rather than proof.
What else affects which tonneau cover fits?
Options that change the bed's shape rather than its length. RamBox narrows the usable width on a Ram and needs a different part number entirely. Factory bed rails on a Silverado or Sierra, and utility track systems on a Tacoma or Frontier, sit where a clamp-on cover clamps — some covers clamp over them, some need them removed, some are not offered.
Sources
Read next
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