Rotavator HP Requirement Calculator
Find the tractor horsepower required for a rotavator of any width — or the right rotavator size for your tractor.
Rotavator power need ≈ 25–35 HP per metre of width (light sandy soil 25, medium loam 30, heavy clay or puddling 35). A 1.5 m (5-ft) rotavator therefore wants a 40–50 HP tractor; running it on less lugs the engine, burns clutches and shears PTO pins.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Farmers and custom-hire operators use the free Rotavator HP Requirement Calculator for an instant, accurate machinery answer — no formulas to remember, works offline in the field.
About Rotavator HP Requirement Calculator
The rotavator is India's most-bought tillage implement, and the most common matching question at any dealership is 'will it run on my tractor?'. Unlike drawn implements, a rotavator takes its power through the PTO, and the demand scales with width and soil: roughly 25 HP per metre in light soil, 30 in loam, 35 in heavy clay or paddy puddling. This tool multiplies your rotavator width by the soil factor to give the honest HP requirement (plus a 10% reserve) — protecting you from the under-powered pairing that stalls in hard patches and destroys clutches and PTO shafts.
How to use Rotavator HP Requirement 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 Rotavator HP Requirement 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
Which rotavator suits a 45 HP tractor?+
In medium soil (30 HP/m), a 45 HP tractor comfortably runs a 1.25–1.5 m (4–5 ft) rotavator. In heavy clay or for paddy puddling, stay at 1.25 m (4 ft); in light sandy soil it can handle 1.65 m (5.5 ft).
Why does my rotavator stall my tractor?+
It's too wide for the power in your soil, you're working too deep in one pass, or ground speed is too high for the rotor gear. Use the shallower first pass + deeper second pass technique, select a lower rotor speed, or move up in tractor power.
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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