Tractor Ballast Calculator

Estimate rear ballast needed to safely counterweight a loaded front-end loader on a compact tractor.

Common questions

How much ballast does a compact tractor need?: Typical rule of thumb: match ballast to about 100–150% of the loader's rated lift capacity. The calculator refines this using your tractor and loader weights.
Is a ballast box or loaded rear tires better?: Loaded tires lower center of gravity and improve traction. A ballast box adds concentrated rear weight closer to the drawbar. Most owners run both.
Can I use an implement as ballast instead?: Yes — box blades, rotary cutters, and grader boxes work well if they weigh enough (typically 400–600+ lb) and are properly attached.
What happens if I skip rear ballast?: Reduced lift capacity, front-axle overload, poor braking on hills, and rear wheels lifting during heavy loader work — a common tip-over cause.
How heavy should my ballast box be?: For Category 1 sub-compacts, 400–600 lb is typical. Compact 30–45 HP tractors usually run 600–1,000 lb ballast boxes.