Farm Equipment Acres Per Hour Calculator (12 Implements)

Last reviewed: October 2026 Reviewed by Michael Steve

By Michael Steve, reviewed by Michael Steve Formulas checked against worked examples Free, no sign-up

One calculator for every implement

Every ground-driven implement (plow, disk, cultivator, planter, drill, sprayer, baler, cutter or combine) follows the same relationship between width, speed and efficiency. Choose an implement above to load typical values, then edit them to match your machine. The result is the machine’s effective field capacity in acres per hour, plus acres per day, time for your field and optional fuel per acre.

Typical rates by implement

Illustrative planning values. Widths vary widely by machine; enter your actual working width above.
Implement	Typical width	Speed	Efficiency	Acres / hour	Acres per 10-hr day
Moldboard plow	8 ft	4.5 mph	80%	3.5	35
Chisel plow	15 ft	5.5 mph	80%	8.0	80
Tandem disk harrow	20 ft	6 mph	80%	11.6	116
Field cultivator	40 ft	6 mph	80%	23.3	233
Grain drill / air seeder	20 ft	5 mph	70%	8.5	85
Row-crop planter (12-row, 30 in)	30 ft	5 mph	65%	11.8	118
Row cultivator	30 ft	5 mph	80%	14.5	145
Boom sprayer	90 ft	12 mph	65%	85.1	851
Mower-conditioner / windrower	16 ft	8 mph	75%	11.6	116
Baler (swath width)	15 ft	5 mph	70%	6.4	64
Rotary cutter (batwing)	15 ft	5 mph	80%	7.3	73
Combine (30 ft header)	30 ft	3.5 mph	70%	8.9	89

Open a preset directly: row-crop planter, grain drill, baler, combine or boom sprayer.

The formula

Effective field capacity (ac/hr) = (Width in ft × Speed in mph × Field efficiency) ÷ 8.25

The theoretical field capacity is the same calculation at 100% efficiency. The ratio of effective to theoretical capacity is the field efficiency. This calculator shows both so you can see how much capacity is lost to real-world conditions.

Field efficiency by operation

Approximate ranges commonly used for planning; your fields and management will move you up or down within (or beyond) them.
Operation	Typical efficiency range
Primary and secondary tillage (plow, chisel, disk, field cultivator)	70–90%
Row-crop planting	50–75%
Drilling / air seeding small grain	60–80%
Boom spraying	55–80%
Mowing / rotary cutting	70–85%
Baling	60–80%
Combining	65–80%

Operations with frequent stops (planting, spraying) sit at the lower end because of refilling; simple, continuous passes (tillage, mowing) score higher. Long fields, wider machines and GPS guidance push the number up; short, irregular fields push it down.

Using capacity to plan your season

Once you have a rate, work backwards from your deadline: days needed = acres ÷ (acres per hour × hours per day). For 1,200 acres with a planter that covers 11.8 ac/hr for 10 hours a day, you need 10.2 working days. If your planting window offers only 6 suitable days, you know before the season starts that you need a bigger machine, a second planter or more efficient logistics.

Compare options. Run the calculator for a current implement and a wider replacement to see the payback in hours saved.
Price custom work. Multiply hours by your cost per hour, or use fuel per acre as a starting point.
Check tractor fit. Confirm that your tractor has enough hydraulic, PTO and drawbar capacity for the implement width you plan.

Planting? Work out how much seed to order with the seeding rate calculator, then verify the stand with the plant population calculator. Not sure of the acres? Measure them with the acreage calculator, or use the simpler acres per hour calculator for a quick answer.

Specific tools: sprayer gallons per acre, bush hog acres per hour, mowing acres per hour.

Frequently asked questions

What is effective field capacity?

It is the number of acres a machine actually covers per hour in real conditions: theoretical capacity (width × speed ÷ 8.25) multiplied by field efficiency.

How do I find the field efficiency of my machine?

Time a full field with your hour meter, divide acres by hours to get the effective rate, then divide that by the theoretical rate (width × speed ÷ 8.25). The result is your efficiency.

Which implement covers the most acres per hour?

Wide, fast implements such as boom sprayers and large field cultivators lead the list, often 25–85+ acres per hour. Slow, heavy operations such as plowing, or narrow ones like a small mower, are much lower.

Does horsepower change acres per hour?

Not directly. Horsepower determines whether your tractor can pull the implement at the desired speed. Acres per hour is set by working width, speed and efficiency.

How many acres per day can I plant?

A 30-ft planter at 5 mph and 65–70% efficiency covers about 12–13 acres per hour, or roughly 118–127 acres in a 10-hour day. Use the calculator with your own planter width.

Sources and further reading

The formulas on this page are standard and can be checked against these references. Where a figure is a planning range rather than a measurement, the page says so.