Truck Axle Load Calculator

Inputs

View results
Distance between the front axle and rear axle centerlines.
ft
Gross vehicle weight rating from the manufacturer placard.
lb
Front gross axle weight rating.
lb
Rear gross axle weight rating.
lb
Measured front axle weight before the entered loads. Use scale data when possible.
lb
Measured rear axle weight before the entered loads. Use scale data when possible.
lb
Weight of the first load group.
lb
Center-of-gravity distance from the front axle to load A.
ft
Weight of the second load group.
lb
Center-of-gravity distance from the front axle to load B.
ft
Weight of the third load group. Use this for hitch, tail, tool body or overhang load when needed.
lb
Center-of-gravity distance from the front axle to load C. Values beyond the wheelbase represent rear overhang.
ft
Position used to estimate how much more payload can be added before GVWR or an axle rating controls.
ft

Results

Default result
Edit inputs
Gross vehicle weight(GVW)
9,800lb
Pass

Also computed

Front axle load(F_axle)Pass4,129lb

Rear axle load(R_axle)Pass5,671lb

GVWR margin(M_GVWR)Pass2,200lb

Front axle margin(M_F)Pass1,071lb

Rear axle margin(M_R)Pass2,329lb

Total added load(W_add)3,400lb

Truck axle load preview: 4,129 pounds front axle, 5,671 pounds rear axleAxle-load previewStatic reactions from measured empty axle weights plus load centers measured from the front axle.front axlerear axleload Aload Bload Ccombined CGFront 4,129 lb, rear 5,671 lbGross 9,800 lb. Next load at the entered CG is limited by GVWR.
Method notes 3 notes
  • Static reaction math: rear load change = W*x/L and front load change = W*(1 - x/L), with x measured from the front axle.
  • Loads behind the rear axle can unload the front axle and add more than their own weight to the rear axle reaction.
  • This is a first-pass static planning screen. Final fleet, towing or road-use decisions need certified scale weights, tire ratings, manufacturer placards, axle-group rules, bridge-law checks and local regulations.

Powered by MachineCalcs ↗