Tractor Ballast Calculator
Work out the total weight and added ballast your tractor needs for efficient draft work.
Target weight ≈ 50–60 kg per engine HP for heavy draft work at 6–8 km/h (less for light, fast work). Split roughly 25–35% front / 65–75% rear on 2WD. Add via cast weights or 75%-filled rear tyres; remove ballast for transport and light tasks.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers and custom-hire operators use the free Tractor Ballast Calculator for an instant, accurate machinery answer — no formulas to remember, works offline in the field.
About Tractor Ballast Calculator
Ballasting is how you buy traction without buying horsepower: the right total weight lets the tyres turn engine power into pull at the optimal 8–15% slip, while wrong ballast wastes fuel in either direction — spinning when too light, hauling dead weight when too heavy. The working rule is 50–60 kg of total tractor weight per HP for serious draft work, adjusted down for lighter, faster operations. This tool compares that target against your tractor's current weight and tells you how many kilograms of cast iron or tyre-water to add (or remove), to be split front/rear per your manual.
How to use Tractor Ballast Calculator
- 1Enter your tractor/implement figures into the inputs.
- 2Read the headline result and the supporting breakdown.
- 3Apply the guidance in the note to your machinery decisions.
Why use Tractor Ballast Calculator?
- ✓Uses the standard, citable agricultural-engineering formula
- ✓Clear inputs with realistic defaults
- ✓Instant result with the full working shown
- ✓Free, fully in-browser and private
Frequently asked questions
How much should a tractor weigh for ploughing?+
About 50–60 kg per engine HP for heavy draft at 6–8 km/h — a 50 HP tractor should total ~2,750 kg. Most tractors leave the factory lighter than this, expecting you to ballast for draft work.
How do I add ballast to a tractor?+
Cast-iron weights on the front frame and rear wheels, and/or water-filling rear tyres to 75% (with anti-freeze where relevant). Keep front/rear split per the manual (~30/70 for 2WD draft), and verify with a wheel-slip check under load.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline at the farm and your data never leaves the device.
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