How to Measure Your Truck Bed for a Tonneau Cover


Not sure what size truck bed you have? Don’t worry, figuring this out doesn’t require the same kind of uncomfortable measurements that your tailor has to make. We’ve got a few quick ways to check, so whether you’re ready to buy a tonneau cover or are just checking out the market for one, we’ll get you going with the info you need in no time.

Sure, there are a few other ways to check your truck’s specifications to see what it was outfitted with from the factory, but just to eliminate any confusion or uncertainty, the best way is just to do it the old fashioned way, and break out the measuring tape and check your truck bed dimensions yourself.

How to measure your truck bed for a tonneau cover:

Don’t worry about exact measurements!

We just need ballpark numbers. Most trucks are only offered in a few different lengths, and those options are usually 1-2 feet or more apart from each other. Plus, different manufacturers measure their beds in different places, and a bedliner can throw that number off anyway, so your measurements will never be exactly what’s advertised.

As long as your measurement is within a few inches of one of the bed lengths offered, then you’re set. For instance

First up, bed length:

This is the first thing you need to know, and for some trucks, the only thing: 

  1. Put down the tailgate and stand at the end of the bed
  2. Extend your measuring tape longways in the center of the bed to the far end, up against the bulkhead
  3. Take your measurement at where the bed ends and the tailgate begins
Inches to feet converter:
Hey, no judgement. I’m lazy too.


Now take your measurement and go pick out a cover. You’ll have a couple length options to choose from, you just need to pick the one closest to your measurement. However, there might be a few other factors to consider (depending on your truck).


  1. I am looking at buying a used BAKFLIP G2. Measurements of the cover are 5’1” wide and 6’6” long. My truck bed is 5’2” wide and 6’6” long. I have a 2017 Nissan Titan king cab that has the utilitrack system. Also if necessary after getting it do you sell replacement parts? Thank you

    • Hey Mike,
      Do you know what truck the cover is coming off of? The mounting and framework differs from truck to truck, so if the cover you’re buying isn’t coming off an equivalent Titan, then it probably won’t fit. If you’re not sure what truck it came off of, if you have the part number then I can look it up for you and see if there’s anything we can do to make it work.


    • Hey Bryan, I looked into it and unfortunately the beds are different dimensions, and the covers don’t fit between them. I’ll shoot you an email.


  2. I haven’t seen mention of bed widths when measuring for tonneau covers. I bought a 2018 Canyon. I’ve seen several covers described for fleet-side. Mine is step-side. Will the same cover fit both fleet-side and step-side trucks with the same bed length?

    • Hey Gary,

      As far as I can find, GMC doesn’t make a true stepside bed for the 2018 Canyon, so it’s just the long bed or short bed you have to worry about, no difference in the bed width.

      I’ll shoot you an email to follow this up.


  3. My 2013 Ram 1500 bed measures 74.5″. What size bed cover do I order? I ordered a 6’5″ but it hangs over at the back corners.

    • Hey Glenda,

      Which tonneau cover did you order? Did you order through us? I tried to look up your order with this email and name but couldn’t find anything.

      Shooting you a follow up email now to see if we can get this figured out!

  4. Hey Garret,

    I have a bakflip mx4 coming off of a 5’7 2017 F150, I’m hoping I can get it to fit my New body style 2019 Ram 1500 5’7 bed. Any chance this could work?

    • Hey Belal,

      OK so the part numbers are different between the MX4’s for each truck, so at the very least the mounting is different. The beds are also slightly different dimensions, so I think even if you were able to rig it to fit, the seal would not be great. My advice would be to reach out to BAK directly, maybe the cover itself will fit, but you need different mounting hardware? Honestly not sure on this one.


    • Hey Brett,

      Unfortunately the beds are slightly different dimensions and are not transferable. Hope this helps!



  5. Hi,

    I looking to get a Tonneau cover but I’m not sure which fits my truck. I have 2001 Nissan Frontier crew cab. No side steps. 54 3/4 x 54 3/4 inside bed measurements.

    Thank you

    • Hey Broc,

      Sure, we’ve got plenty, check out this link below that will show you all the covers we have that fit your ’01, and then from there you can click in and choose your bed size, in your case is marked as the 4’8″ bed (slightly different than your measurements due to where they measure from).

      If you need any more specific recommendations from there, let me know! I’m going to send you an email with this info as well just in case.


  6. Curious if a retractable cover that was on a 2017 Chevy Silverado would fit a 2019 ram 1500(new style), from everything I’ve found it appears to just be slightly smaller in length, i was just hoping the covers had some wiggle room

    • Hey John,

      Ehh, you might be able to attach it since the beds are within an inch of each other in width, but it’s not going to fit right and will not have a weather tight seal at all. It wouldn’t hurt to try it on I guess, but I wouldn’t recommend it longterm.


    • Hey Anthony,

      As far as I can tell, the beds should be the same dimensions between the 2017 and 2019. I went and compared part numbers between them to make sure, and they are a match between the years, so while I’m not sure what cover you have, I’m pretty sure it should swap right over.

      Hope this saves you a couple bucks! I’ll shoot you an email with this as well just in case you miss the comment.


  7. I have a 2006 Chevy Colorado Crew Cab, the inside dimensions of the bed from bulkhead to tailgate is measure 1/2″ shy of 5′. I’ve been looking at tonneau covers that are 5′ 1″ and 5′ 2″ that supposedly fits my truck according to the covers manufacturer. Same Manufacturer for both covers. What kind of difference will 1″ make and which one will fit my truck better?

    • Hey Josh,

      Which covers were you looking at? Most of the time these bed lengths are rounded numbers anyway, and depending on where exactly they measure from they might come up with a slightly different number. As long as it’s a reputable manufacturer and the cover is built for that generation Colorado short bed model, then you should be solid. The covers are almost assuredly the same size is what I’m saying.

      If you give me a little more info on what exactly you’re looking to get out of the cover and your budget I can make some recommendations. I’ll shoot you an email to follow up.


  8. I had a 2014 F150 XLT short bed, and have since purchased a 2019 F150 XLT short bed. I had purachsed the Tonneau soft rolling bed cover- will this fit my 2019?

    • Congrats on the new truck! Unfortunately the beds are different dimensions for the 2015+ F-150s, so that cover will not transfer over. If you need any recommendations on a new one, let me know!


  9. I have a 2000 f150, purchased a roll-up tonneau cover & it is too wide. Do you know what type of cover is needed? I assumed all I needed was the length


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