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08-26-2020, 03:23 PM
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#1
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Member
Join Date: Sep 2016
Posts: 97
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Calculated Trailer and Tongue Weight
For some, like me, getting access to a scale to get a reading on the trailer and tongue weight is difficult. It is, however, possible to calculate trailer weights using math and physics. Fortunately engineers have already done the thinking for those of us that have forgotten our calculus and physics. The following website provides instruction and a fill-in calculator. The accuracy of the calculator is depended on how well you measure and weigh what is in the trailer. The model really gives you a good estimates of total trailer weight, axle and wheel weights, and tongue weight. For those of you that have actual weights it would be informative to see how close the computation comes to your scale results.
Go to: https://www.engineersedge.com/calcul...t-balance.html
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08-26-2020, 03:41 PM
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#2
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Senior Member
Join Date: Jul 2017
Location: Almost Tijuana
Posts: 1,234
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I get a 404 error for that link. Is this using a bathroom scale and some 2X's? I've done that before but it is pretty sensitive to getting all the contact points at the proper measurements.
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I just want to be outside!!!
'17 Salem Cruise Lite 210RBXL
'11 F150 5.0
Only one shedding mutt now RIP Yoshi
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08-26-2020, 03:42 PM
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#3
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Senior Member
Join Date: Sep 2019
Location: Frankfort, IL
Posts: 284
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2020 Flagstaff Micro Lite 25BRDS SOLD!
2024 Brinkley Z3100
2021 Ford F-350 XLT 6.7L Power Stroke
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08-26-2020, 04:10 PM
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#4
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Member
Join Date: Sep 2016
Posts: 97
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No it does not used a scale and a fulcrum. Try copying the link and pasting it in a new tab. Sorry
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08-26-2020, 06:56 PM
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#5
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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You still need to have weights to enter into the calculations, where else can you get the correct numbers than from a scale? Scales are not hard to find. Every truckstop has them.
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Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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08-26-2020, 07:33 PM
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#6
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Member
Join Date: Sep 2016
Posts: 97
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Yeah right. I kinda know what I put in my camper and approximately what it weighs. Smaller trailer with a maximum loading weight. And living in a small town nobody has a tongue scale. I guess if you have a 5er or a hefty truck you don't have to pay that much attention.
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08-26-2020, 08:46 PM
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#7
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Senior Member
Join Date: Aug 2011
Location: Albany, GA.
Posts: 1,359
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Although many truck stops have scales, and some are "Cat" scales, not all CAT scales allow RV weighing. There is a large "Pilot" truck stop in my town (Albany, Ga.) with a CAT scale but they DO NOT allow weighing anything other than commercial truck s. It would be nice if they would allow RV weighing, , ,
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08-27-2020, 07:06 AM
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#8
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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Quote:
Originally Posted by Thurman
Although many truck stops have scales, and some are "Cat" scales, not all CAT scales allow RV weighing. There is a large "Pilot" truck stop in my town (Albany, Ga.) with a CAT scale but they DO NOT allow weighing anything other than commercial truck s. It would be nice if they would allow RV weighing, , ,
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It's the policy of that truckstop, not CAT scales. It's time rv'ers quit using that particular truckstop for fuel, food and other supplies. I'll bet they love it when rv'er drops $100+ for their purchases.
__________________
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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08-27-2020, 09:59 AM
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#9
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Grammar Pedant
Join Date: Aug 2017
Location: Frederick, CO
Posts: 1,580
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Don't overthink it. Either Dry weight + 1,200 or just use your trailer's GVWR for your expected weight. Then, to calculate the hitch, multiply by 12.5% (middle of the 10-15% range for a conventional tow trailer; use a lower value for toy haulers and a higher number for single axles).
Trailer 1:
UVW: 7,193
GVWR: 9,250
Therefore, I'd figure the weight rolling down the road would be 8,400 lbs and it would be dropping 1,050 lbs onto the hitch
Trailer 2:
UVW: 3,795
GVWR: 4,500
Therefore, I'd figure the weight rolling down the road would be 4,500 lbs and it would be dropping ~580lbs onto the hitch.
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Every time you use an apostrophe to make a word plural, a puppy dies.
TV: 2019 F-350 Lariat 4WD CCSB 6.7 PSD 3.55, 3,591 lb payload
Former RV: 2018 Rockwood Mini Lite 2504S
Former RV: 2007 Fleetwood/Coleman Utah
Former TV: 2005 F-150 King Ranch 4WD SCrew 5.4L Tow Package
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08-27-2020, 10:43 AM
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#10
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,334
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Quote:
Originally Posted by 67L48
Don't overthink it.
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What?
And take all the fun out of most discussions?
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"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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08-27-2020, 01:36 PM
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#12
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Junior Member
Join Date: Mar 2020
Posts: 24
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trailer and tongue weights
I also live in a small town, but we have a landscaping company that sells material by weight (truckload). They have a drive on scale and allowed me to weight my truck for free. I imagine they might charge me for the truck and the trailer, but it's an option you might look into.
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08-27-2020, 02:19 PM
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#13
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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Use a catscale for your axle weight. Just do it on a trip whn you happen to see one. For the tongue weight, buy a Sherline scale. Handy to have.
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