Calculate 5th Wheel Towing Capacity

Work out the 5th wheel towing capacity for any vehicle. Check the legality of your rig. What size 5th wheeler can this ute tow? This calculator also works for goosenecks. Calculate gooseneck towing capacity for utes and trucks. 5th Wheeler Towing Capcity Calculator. Designed for Australian utes and 5th wheelers in Australia.

Overview

What This Calculator Gives You

  1. Calculate the 5th wheel towing capacity for a given vehicle. (This is the maximum size/weight 5th wheeler you can tow).
  2. Check whether a specific 5th wheeler can be towed by a given ute/vehicle.
  3. What is the maximum size/weight 5th wheeler that can be towed with a given ute/vehicle.
  4. What is the minimum size vehicle that you need to tow a given 5th wheeler.

Most Australian vehicles (like the Ford Ranger, Mazda BT-50, Nissan Navara, Isuzu D-Max, Holden Colorado, Holden Rodeo) do not come listed with a 5th wheel towing capacity. This calculator will determine the 5th wheeler towing capacity for any vehicle.

Instructions

How To Use (General)

  • Enter values in the yellow boxes.
  • Each time you enter a value then click outside the box (or use the 'tab' key to get to the next box), the calculator will update.
  • Only enter whole numbers.

How to Calculate - 5th Wheel Towing Capacity for a Given Vehicle

  • Enter vehicle details in Section A
  • Open Section B for the result.
  • You can also add additional info in Section B, so you can calculate the tare (dry/empty) weight required for the van.

How to Calculate - Suitability of a Given Ute for a Given Vehicle

  • Enter vehicle details in Section A
  • Enter 5th wheeler details in Section B
  • Open Section C for the result

How to Calculate - Vehicle Required for a Given 5th Wheeler

  • Enter 5th Wheeler details in Section B
  • Open Section E for the result

[A] Enter Vehicle Specifications (for a known vehicle)

Enter Vehicle Specifications


Available from the manufacturer's website, owner's handbook or compliance plates:
A1 Kerb Weight / Tare
A2 Gross Vehicle Mass (GVM)
A3 Payload
A4 Effective GVM
A5 Gross Combination Mass (GCM)
A6 Towing Capacity


Add Your Vehicle Load

A7 Load Allowance Weight of anything in/on the ute - hitch, driver+ passengers, cargo, fuel  
Passenger weight
Fuel weight
Hitch weight The weight of the tow hitch itself, not the down weight from the van.
Tray weight Cab-chassis utes need the weight of the tray added.
Cargo weight
Total Load

[B] Calculate 5th Wheel Towing Capacity / Maximum Size 5th Wheeler for Vehicle in (A)

B1 Maximum weight of loaded van Remaining total vehicle capacity [GCM (A5) - vehicle kerb (A1) + load (A7)]
B2 Maximum pin weight of loaded vanRemaining vehicle payload capacity [GVM (A4) - vehicle kerb (A1) - load (A7) ]
B3 Maximum axle weight of loaded vanTowing capacity of vehicle [A6]
B4 Ideal Weight Distribution To Acheive Maximum Size (% / kg)Based on B1-B3, the van requires this distribution to be legal.
Pin
Axle
   

If the distribution above is not close to 20% / 80%, (e.g. you get a 40/60 split) it is highly unlikely that you could get a 5th wheeler to suit. Therefore, you should reevaluate below using an expected distribution closer to the normal 20/80 split.

B5 Enter Expected Van Load Distribution Enter assumed weight distribution between pin and axle group. A 20/80 split is fairly standard.
Pin %
Axle Group %
Calculation ProcessBased on the manually entered distribution (B5), the maximum weight is re-calculated.


5th Wheel Towing Capacity

B6 Maximum Loaded Weights
Effective "5th Wheel Towing Capacity"Maximum weight of 5th wheeler based on expected distribution (D5) - such that it doesn't exceed the GVM (A4) or Towing Capacity (A6)
Pin kg
Axle kg
TOTAL kg


Enter Your Van's Expected Load

B7 Load AllowanceEstimate the amount of gear you will add to the van yourself. We work back from here to get the required starting weight.  
  Tanks - Fresh/Grey/Black Allow 1 kg per 1 litre. Assume a full fresh tank, and partially filled grey and black tanks.
  Food & Clothes
  Fitted Accessories Batteries, Gas Bottles, Awnings, Solar Panels etc are normally not included in the Tare weight and must be added as load on the van.
  Other Any other cargo in van - e.g. camp chairs/tables, annex walls etc.
  Total Load


Calculated Tare Weight of Largest 5th Wheeler

B8 Maximum Tare / Empty WeightsMaximum Loaded Weights (B6) - Load Allowance (B7)
Pin kg
Axle kg
TOTAL kg

[C] Enter 5th Wheeler Specifications (for a known van)

Enter 5th Wheeler Specifications

C1 Tare / Kerb / Dry / Empty
C2 Aggregate Trailer Mass (ATM)
C3 Gross Trailer Mass (GTM)
C4 Pin Weight (at Tare/Empty)


Add Your Van Load

C5 Load Allowance Weight of anything in/on the ute - hitch, driver+ passengers, cargo, fuel
Tanks - Fresh/Grey/Black Allow 1 kg per 1 litre. Assume a full fresh tank, and partially filled grey and black tanks.
Food & Clothes
Fitted Accessories Batteries, Gas Bottles, Awnings, Solar Panels etc are normally not included in the Tare weight and must be added as load on the van.
Other Any other cargo in van - e.g. camp chairs/tables, annex walls etc.
Total Load


Van Load Check

C6 Van Loaded Weight < ATM (Tare (B1) + Van Load (B5)) < B2 <
C7 Axle Weight at Load < GTM ( Axle Weight % (C2) x Van Loaded Weight (C1) ) < GTM (B3) <

[D] Check Whether Vehicle in (A) Can Tow 5th Wheeler in (B)


Calculations & Checks

Is all information above valid?

D2 Van Load Distribution Pin Weight at Tare (B4) / Tare (B1) % Pin
% Axle Group
D3 Pin Weight at Load Pin Weight % (C2) x Van Loaded Weight (C1)
D5 Axle Weight at Load < Towing Capacity ( Axle Weight % (C2) x Van Loaded Weight (C1) ) < Towing Capacity (A6) <
D6 Vehicle Loaded Weight < GVM ( Kerb (A1) + Vehicle Load (A7) + Pin Weight at Load (C3) ) < GVM (A4) <
D7 Combination Mass < GCM ( Vehicle Kerb (A1) + Vehicle Load (A7) + Van Tare (B1) Van + Load (B5) ) < GVM (A5) <


Final Result

D8 Summary of checks

[E] Calculate Minimum Vehicle Specifications Required to Tow 5th Wheeler in [B]

E1 Van Loaded Weight
E2 Pin Weight at Load
E3 Axle Weight at Load


Add Your Vehicle Load

E4 Load Allowance Weight of anything in/on the ute - hitch, driver+ passengers, cargo, fuel  
Passenger weight
Fuel weight
Hitch weight The weight of the tow hitch itself, not the down weight from the van.
Tray weight Cab-chassis utes need the weight of the tray added.
Cargo weight
Total Load


Required Vehicle Capacities

E5 Kerb Weight / Tare
E6 Payload
E7 Gross Vehicle Mass (GVM)
E8 Towing Capacity
E9 Gross Combination Mass (GCM)

Notes

  • The 'Towing Capacity' specification of vehicles is not always clear. On some vehicles it refers to the axle weight of the trailer it can tow (GTM). On other vehicles it refers to the entire trailer weight (ATM) - assuming a normal tow ball setup. This can be very difficult to find out. We assume that the towing capacity refers to the axle weight of the trailer it can tow. (This is the optimisic version).
  • This calculator does not currently check the axle load limits of the tow vehicle.
  • At the end of the day, you, as the owner/driver of the rig, need to be confident that you have a legal rig. This calculator is a guide only.

This calculator can be used to calculate:

  • Nissan Navara 5th Wheel Towing Capacity
  • Ford Ranger 5th Wheel Towing Capacity
  • Mazda BT-50 5th Wheel Towing Capacity
  • Holden Colorado 5th Wheel Towing Capacity
  • Isuzu D-Max 5th Wheel Towing Capacity
  • Ford Falcon 5th Wheel Towing Capacity
  • Iveco 5th Wheel Towing Capacity
  • Ford Transit 5th Wheel Towing Capacity
  • Dodge Ram 5th Wheel Towing Capacity
  • GMC 5th Wheel Towing Capacity


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