Enter Shipment and Cargo Inputs
Use positive Y values for right offsets and negative values for left offsets.
Example Data Table
This sample mirrors a practical trailer loading scenario for test calculations and staff training.
| Cargo Item | Weight (kg) | X Position (m) | Y Offset (m) | Placement Note |
|---|---|---|---|---|
| Pallet A | 2,200 | 1.80 | -0.35 | Heavy pallet near front-left zone |
| Pallet B | 1,800 | 3.90 | 0.20 | Mid-bay load, slightly right of center |
| Pallet C | 1,600 | 6.40 | 0.10 | Rear-mid placement with mild right bias |
| Pallet D | 900 | 7.40 | -0.25 | Light rear-left support load |
Formula Used
1) Gross Weight
Gross Weight = Tare Weight + Sum of All Cargo Weights
2) Longitudinal Center of Gravity
XCG = (Tare Weight × Tare X + Σ(Cargo Weight × Cargo X)) / Gross Weight
3) Lateral Center of Gravity
YCG = (Tare Weight × Tare Y + Σ(Cargo Weight × Cargo Y)) / Gross Weight
4) Axle Loads by Static Equilibrium
Front Axle Load = Gross Weight × (Wheelbase − XCG) / Wheelbase
Rear Axle Load = Gross Weight × XCG / Wheelbase
5) Side Loads by Lateral Distribution
Left Side Load = Gross Weight × ((Track Width / 2) − YCG) / Track Width
Right Side Load = Gross Weight × ((Track Width / 2) + YCG) / Track Width
6) Corner Loads
Corner loads are estimated by applying left and right load shares to front and rear axle loads. This is a planning approximation for static loading reviews.
How to Use This Calculator
- Enter equipment geometry, including wheelbase and track width.
- Add tare weight and its center-of-gravity location.
- Fill in gross, axle, and side capacity ratings.
- Enter each cargo item weight and its X and Y position.
- Use negative Y for left offsets and positive Y for right offsets.
- Submit the form to calculate gross weight, CG, axle loads, side loads, and corner estimates.
- Check the compliance table and graph for overloads or imbalance.
- Download the result set as CSV or PDF for dispatch records, planning notes, or internal audits.
Frequently Asked Questions
1) What does this calculator measure?
It estimates gross vehicle weight, longitudinal and lateral center of gravity, front and rear axle reactions, left and right side loads, and approximate corner loads for static freight placement.
2) What is the X position?
X position is the cargo center measured along the vehicle length from the front axle reference line. It controls how much load shifts toward the front or rear axle.
3) What is the Y offset?
Y offset is the cargo center measured left or right from the trailer centerline. Negative values move weight left, while positive values shift it right.
4) Why can an axle load become negative?
A negative reaction means the center of gravity moved outside the support span. In practice, that indicates an unstable arrangement, excessive overhang, or unrealistic geometry inputs.
5) Are corner loads exact?
They are planning estimates. True corner loads can vary with suspension behavior, deck flexibility, multi-axle geometry, and uneven surfaces. Use scale measurements for final verification.
6) Can I use this for containers and trailers?
Yes. The model works for many static logistics setups when you know the support geometry, tare weight, and the position of each cargo center.
7) What does the balance score mean?
The score is a practical indicator based on front-rear and left-right deviation from an even split. Higher values suggest more balanced static loading.
8) Should this replace legal axle-scale checks?
No. It supports planning, training, and pre-dispatch reviews. Always confirm actual legal compliance with certified scales, route rules, and equipment-specific manufacturer guidance.