Please enter a valid GVWR.Maximum allowable operating weight of the truck. Find this on your truck's door jamb sticker.
Please enter a valid GCWR.Maximum allowable weight of the fully loaded truck AND trailer combined. From door jamb sticker.
Please enter a valid payload capacity.Maximum weight your truck can carry, including passengers, cargo, and 5th wheel pin weight. From door jamb sticker.
Please enter a valid RAGWR.Maximum weight allowed on your truck's rear axle. From door jamb sticker.
Please enter a valid curb weight.The empty weight of your truck, with fluids but no cargo or passengers. Can be found on your truck's title or a scale ticket.
Please enter a valid rear axle empty weight.Weight on the rear axle when the truck is empty. This is crucial for an accurate RAGWR check. If unknown, leave blank; the RAGWR check will be less precise.
Truck Load (excluding trailer)
Please enter a valid hitch weight.Weight of your 5th wheel hitch installed in the truck bed.
Please enter a valid weight.Total weight of all passengers and cargo inside your truck (excluding the hitch and pin weight).
Trailer Information
Please enter a valid dry weight.Unloaded Vehicle Weight (UVW) of your 5th wheel trailer. From trailer sticker.
Please enter a valid cargo weight.Weight of all personal belongings, gear, and supplies you'll load into the trailer.
Please enter a valid weight.Weight of full fresh water tanks (8.34 lbs/gallon or 1 kg/liter) and propane tanks.
Please enter a percentage between 10% and 30%.Typical 5th wheel pin weight is 15-25% of the loaded trailer weight. Default is 20%.
Please enter a valid trailer GVWR.Maximum allowable operating weight of the trailer. From trailer sticker.
Your 5th Wheel Towing Capacity Results
Calculating...
Detailed Breakdown:
Loaded Trailer Weight:0 lbs
Estimated Pin Weight:0 lbs
Total Truck Payload Used:0 lbs
Actual Truck GVW:0 lbs
Actual Gross Combined Weight:0 lbs
Actual Rear Axle Weight:0 lbs
Towing Capacity Visualizer
This chart visually compares your actual weights against your vehicle's rated capacities. Green indicates within limits, red indicates over limit.
Capacity Compliance Table
Summary of Weight Capacities and Compliance
Capacity Check
Your Actual (lbs)
Your Limit (lbs)
Status
Payload Capacity
0
0
Truck GVWR
0
0
GCWR
0
0
Trailer GVWR
0
0
Rear Axle Gross Weight Rating (RAGWR)
0
0
This table provides a quick overview of whether each critical weight limit is met. "N/A" for RAGWR implies "Truck Rear Axle Empty Weight" was not provided.
What is 5th Wheel Towing Capacity?
5th wheel towing capacity refers to the maximum weight a truck can safely tow and carry when hitched to a 5th wheel trailer. Unlike conventional bumper-pull trailers, 5th wheels connect to a hitch mounted in the truck's bed, typically over or slightly forward of the rear axle. This connection type distributes a significant portion of the trailer's weight (known as "pin weight") directly onto the truck's frame, impacting its payload, Gross Vehicle Weight Rating (GVWR), Gross Combined Weight Rating (GCWR), and Rear Axle Gross Weight Rating (RAGWR).
Anyone planning to purchase or already owning a 5th wheel trailer needs to understand their truck's towing capacity. This includes RV enthusiasts, full-time travelers, and anyone transporting heavy equipment with a 5th wheel setup. Misunderstanding these capacities can lead to dangerous towing conditions, premature vehicle wear, and legal issues.
Common Misunderstandings:
Just looking at "Towing Capacity": Many truck manufacturers advertise a maximum "towing capacity," which often refers to bumper-pull capacity and might not account for the specific demands of a 5th wheel, especially regarding payload.
Ignoring Payload: The pin weight of a 5th wheel counts directly against your truck's payload capacity. This is a critical limit often exceeded before the overall towing capacity.
Unit Confusion: Weights are typically measured in pounds (lbs) in the US and Canada, and kilograms (kg) in other parts of the world. Ensure you are using the correct units for your calculations and comparing "apples to apples."
Dry vs. Loaded Weight: Trailer "dry weight" (Unloaded Vehicle Weight - UVW) is what it weighs empty from the factory. You must account for all cargo, water, and propane to get the "loaded trailer weight" for accurate calculations.
5th Wheel Towing Capacity Formula and Explanation
Calculating 5th wheel towing capacity isn't a single formula; it's a series of critical comparisons. You must ensure that your loaded truck and trailer combination does not exceed any of the manufacturer's ratings. The primary goal is to compare your "actual" weights against your truck's and trailer's "rated" capacities.
Key Formulas:
Loaded Trailer Weight (LTW): LTW = Trailer Dry Weight + Estimated Trailer Cargo Weight + Estimated Water & Propane Weight This is the actual weight of your 5th wheel trailer when fully loaded for travel.
Estimated Pin Weight (EPW): EPW = Loaded Trailer Weight × (Pin Weight Percentage / 100) This is the vertical weight the trailer places on your truck's 5th wheel hitch. For 5th wheels, this typically ranges from 15% to 25% of the LTW.
Total Weight Added to Truck (TWAT) / Total Truck Payload Used: TWAT = Estimated Pin Weight + 5th Wheel Hitch Weight + Passengers & Cargo in Truck This represents all the weight your truck is carrying in its bed and cabin, which directly consumes its payload capacity.
Actual Truck Gross Vehicle Weight (ATGVW): ATGVW = Truck Curb Weight + Total Weight Added to Truck (TWAT) This is the total weight of your truck when fully loaded and hitched to the trailer.
Actual Gross Combined Weight (AGCW): AGCW = Actual Truck GVW + Loaded Trailer Weight This is the total weight of your entire truck and trailer combination.
Actual Rear Axle Weight (ARAW): ARAW = Truck Rear Axle Empty Weight + Estimated Pin Weight + 5th Wheel Hitch Weight + Rear Passengers & Cargo in Truck This is the actual weight resting on your truck's rear axle. Note: "Rear Passengers & Cargo" is an estimate of how much of your total "Passengers & Cargo in Truck" is over the rear axle. For simplicity in this calculator, we often assume all truck payload (except pin/hitch) contributes to the overall GVW and payload, but for RAGWR, specific rear axle loading is key. If "Truck Rear Axle Empty Weight" is unknown, this check becomes less precise.
Each of these "actual" weights must be less than or equal to the corresponding "rated" capacity of your truck or trailer.
Key Variables for 5th Wheel Towing Capacity
Variable
Meaning
Unit
Typical Range
Truck GVWR
Gross Vehicle Weight Rating
lbs/kg
8,000 - 15,000 lbs (3,600 - 6,800 kg)
Truck GCWR
Gross Combined Weight Rating
lbs/kg
18,000 - 30,000 lbs (8,100 - 13,600 kg)
Truck Payload Capacity
Maximum allowed weight in/on truck
lbs/kg
1,500 - 7,000 lbs (680 - 3,175 kg)
Truck RAGWR
Rear Axle Gross Weight Rating
lbs/kg
5,000 - 10,000 lbs (2,270 - 4,535 kg)
Truck Curb Weight
Empty weight of truck
lbs/kg
5,000 - 10,000 lbs (2,270 - 4,535 kg)
Hitch Weight
Weight of the 5th wheel hitch
lbs/kg
150 - 400 lbs (68 - 180 kg)
Passengers & Cargo in Truck
Weight inside truck cabin/bed
lbs/kg
100 - 1,000 lbs (45 - 450 kg)
Trailer Dry Weight (UVW)
Empty weight of trailer
lbs/kg
5,000 - 18,000 lbs (2,270 - 8,165 kg)
Estimated Trailer Cargo Weight
Weight of belongings in trailer
lbs/kg
500 - 3,000 lbs (225 - 1,360 kg)
Estimated Water & Propane Weight
Weight of fluids in trailer
lbs/kg
200 - 800 lbs (90 - 360 kg)
Pin Weight Percentage
% of trailer weight on hitch
%
15% - 25%
Trailer GVWR
Gross Vehicle Weight Rating of trailer
lbs/kg
8,000 - 22,000 lbs (3,600 - 9,980 kg)
Practical Examples for 5th Wheel Towing Capacity
Example 1: A Common Towing Scenario (Imperial Units)
John owns a Ford F-350 and wants to tow his new 5th wheel RV. He uses our towing capacity guide to find his truck's ratings.
In this scenario, John's setup is within all his truck and trailer's rated capacities. He can tow safely.
Example 2: Overloaded Scenario (Metric Units)
Maria is looking at a larger 5th wheel and thinks her truck can handle it. She's using our calculator and converting to metric units. She consults a RV weight safety guide to ensure she's not missing anything.
Truck Inputs:
Truck GVWR: 6,000 kg
Truck GCWR: 11,000 kg
Truck Payload Capacity: 1,200 kg
Truck RAGWR: 4,000 kg
Truck Curb Weight: 3,800 kg
Truck Rear Axle Empty Weight: 1,800 kg (estimated)
Estimated Pin Weight (EPW): 5,800 kg * 22% = 1,276 kg
Total Truck Payload Used: 1,276 (pin) + 100 (hitch) + 200 (pass/cargo) = 1,576 kg
Actual Truck GVW: 3,800 (curb) + 1,576 (payload used) = 5,376 kg
Actual Gross Combined Weight (AGCW): 5,376 (truck GVW) + 5,800 (trailer LTW) = 11,176 kg
Actual Rear Axle Weight (ARAW): 1,800 (empty rear) + 1,276 (pin) + 100 (hitch) + 200 (pass/cargo) = 3,376 kg
Results:
Payload Capacity: 1,576 kg (Actual) vs. 1,200 kg (Limit) - UNSAFE (OVERLOADED by 376 kg!)
Truck GVWR: 5,376 kg (Actual) vs. 6,000 kg (Limit) - SAFE
GCWR: 11,176 kg (Actual) vs. 11,000 kg (Limit) - UNSAFE (OVERLOADED by 176 kg!)
Trailer GVWR: 5,800 kg (Actual) vs. 6,500 kg (Limit) - SAFE
Rear Axle Gross Weight Rating (RAGWR): 3,376 kg (Actual) vs. 4,000 kg (Limit) - SAFE
In this example, Maria's truck is overloaded on payload and GCWR. She would need a truck with higher ratings or a lighter trailer setup to tow safely. This highlights why checking all limits is crucial, not just one.
How to Use This 5th Wheel Towing Capacity Calculator
Our 5th wheel towing capacity calculator is designed for ease of use and accuracy. Follow these steps to determine your safe towing limits:
Select Your Unit System: At the top of the calculator, choose between "Imperial (lbs)" or "Metric (kg)" based on your preference and the units listed on your vehicle stickers. All input fields and results will automatically adjust.
Gather Your Truck Specifications:
Truck GVWR (Gross Vehicle Weight Rating): Found on the driver's side door jamb sticker.
Truck GCWR (Gross Combined Weight Rating): Also on the door jamb sticker.
Truck Payload Capacity: On the door jamb sticker, often labeled "The combined weight of occupants and cargo should never exceed XXXX lbs/kg."
Truck RAGWR (Rear Axle Gross Weight Rating): On the door jamb sticker.
Truck Curb Weight: The empty weight of your truck. This might be on your title, registration, or require a trip to a public scale.
Truck Rear Axle Empty Weight (Optional): The weight resting specifically on your rear axle when the truck is empty. If you don't know this, the RAGWR check will be noted as less precise. A scale slip (weighing just the rear axle) is best.
Input Your Truck Load:
5th Wheel Hitch Weight: The actual weight of your 5th wheel hitch.
Passengers & Cargo in Truck: The total weight of everyone and everything in your truck's cab and bed (excluding the hitch and trailer pin weight).
Enter Your Trailer Information:
Trailer Dry Weight (UVW): Unloaded Vehicle Weight, found on your trailer's VIN sticker.
Estimated Trailer Cargo Weight: Estimate the weight of all your gear, food, clothes, etc.
Estimated Water & Propane Weight: Account for full water tanks (fresh, gray, black) and propane. (Water is ~8.34 lbs/gallon or 1 kg/liter).
Estimated Pin Weight Percentage: For most 5th wheels, this is between 15% and 25% of the loaded trailer weight. 20% is a good starting estimate. This is a crucial number for hitch weight calculation.
Trailer GVWR (Gross Vehicle Weight Rating): Found on your trailer's VIN sticker.
Interpret the Results:
The "Primary Result" will quickly tell you if your setup is "SAFE" or "UNSAFE."
Review the "Detailed Breakdown" for specific weights.
Check the "Capacity Compliance Table" and "Towing Capacity Visualizer" chart to see which limits are being met or exceeded. Any "UNSAFE" status means you are exceeding a critical manufacturer's rating and need to adjust your setup.
Copy Results: Use the "Copy Results to Clipboard" button to save your detailed calculations for reference or sharing.
Key Factors That Affect 5th Wheel Towing Capacity
Understanding the factors that influence 5th wheel towing capacity is vital for safe and legal towing. It's not just about the numbers; it's about how they interact.
Truck Payload Capacity: This is often the first limit hit with 5th wheels. The pin weight of the trailer, plus the weight of your hitch, passengers, and all cargo in your truck, directly reduces your available payload. Exceeding this can compromise handling, braking, and accelerate wear on suspension components. Refer to your truck payload explainer for more details.
Gross Vehicle Weight Rating (GVWR): This is the maximum total weight your truck can be, including its own empty weight, fuel, passengers, cargo, and the trailer's pin weight. Exceeding GVWR strains the truck's chassis, axles, tires, and brakes.
Gross Combined Weight Rating (GCWR): This is the total maximum allowable weight of the fully loaded truck and the fully loaded trailer combined. It's a comprehensive limit that factors in the power of your engine, transmission, and overall drivetrain. Going over the GCWR impacts acceleration, hill-climbing ability, and stopping distances. Understanding GCWR vs GVWR is critical.
Rear Axle Gross Weight Rating (RAGWR): The RAGWR dictates the maximum weight that can be placed on your truck's rear axle. Since 5th wheel hitches sit directly over or slightly ahead of the rear axle, they place significant weight here. Overloading the rear axle can lead to tire failure, axle damage, and severe handling issues.
Trailer GVWR: Just as your truck has a GVWR, your trailer does too. This is the maximum weight your trailer can be when fully loaded. Exceeding this can lead to tire blowouts, structural damage to the trailer, and compromised braking performance of the trailer itself.
Pin Weight Percentage & Trailer Weight Distribution: The percentage of the trailer's total weight that rests on the pin (and thus on the truck's hitch) is crucial. Too low (e.g., below 15%) can lead to trailer sway and instability. Too high (e.g., above 25%) can overload the truck's payload and rear axle. Proper trailer weight distribution within the trailer itself can help optimize this.
Tires: Both your truck and trailer tires have specific load ratings. Ensure your tires can safely support the actual weights they will be carrying, and that they are properly inflated.
Frequently Asked Questions About 5th Wheel Towing Capacity
Q1: What is the single most important factor for 5th wheel towing capacity?
A: While all factors are critical, truck payload capacity is often the most limiting factor for 5th wheel towing. The significant pin weight of a 5th wheel trailer quickly consumes available payload, often before other limits like overall towing capacity are reached.
Q2: Where can I find my truck's weight ratings?
A: Most of your truck's critical weight ratings (GVWR, GCWR, Payload Capacity, RAGWR) are found on a sticker located on the driver's side door jamb or inside the glove compartment. Your truck's curb weight might be on your vehicle's title, registration, or require a visit to a public scale.
Q3: My truck's advertised "towing capacity" is much higher than what this calculator suggests. Why?
A: Truck manufacturers often advertise a maximum "towing capacity" that applies to conventional bumper-pull trailers or a specific, lightly-optioned truck configuration. This advertised number frequently does not account for the high pin weight of a 5th wheel, which directly impacts your truck's payload capacity. Our calculator considers all critical ratings, including payload, GVWR, and GCWR, for a more accurate 5th wheel assessment.
Q4: What if I don't know my truck's Rear Axle Empty Weight?
A: If you don't know your truck's Rear Axle Empty Weight, the calculator cannot perform a precise RAGWR check. You can leave that field blank, and the calculator will indicate this limitation. For the most accurate RAGWR assessment, weigh your truck (empty, with a full tank of fuel) on a public scale, getting separate weights for the front and rear axles.
Q5: Is it safe to exceed any of my truck's weight ratings?
A: No. Exceeding any of your truck's or trailer's manufacturer-specified weight ratings (GVWR, GCWR, Payload, RAGWR, Trailer GVWR) is unsafe, illegal in many places, and can void your vehicle's warranty. It significantly increases the risk of accidents, component failure, and excessive wear and tear.
Q6: How does the pin weight percentage affect my 5th wheel towing capacity?
A: The pin weight percentage is crucial because it determines how much of the trailer's weight is transferred to your truck's payload and rear axle. A higher percentage (within the 15-25% range) generally leads to more stable towing but can more easily exceed your truck's payload or RAGWR. A lower percentage can lead to instability and trailer sway.
Q7: Can I use this calculator for bumper-pull trailers?
A: This calculator is specifically designed for 5th wheel towing, which has unique considerations like pin weight directly impacting payload. For bumper-pull trailers, you'll need to consider tongue weight (typically 10-15% of trailer weight) and use a calculator designed for conventional towing capacity, as the weight distribution on the truck is different.
Q8: What if my calculations show I'm overloaded?
A: If you're overloaded, you must make adjustments. Options include:
Reducing cargo in your truck and/or trailer.
Traveling with less water in your trailer's tanks.
Upgrading to a truck with higher towing and payload capacities.
Choosing a lighter 5th wheel trailer.
Related Tools and Internal Resources
Explore our other helpful tools and guides to ensure you're always towing safely and efficiently:
RV Weight Safety Guide: A comprehensive resource for understanding all aspects of RV weight.
Towing Capacity Guide: General information on understanding and maximizing your vehicle's towing potential.