How many acres can a 10 foot bush hog cut per hour? A 10 foot bush hog cuts 3.64 acres per hour at 4 miles per hour and 75 percent efficiency. At 4.5 miles per hour and the same efficiency it cuts 4.09 acres per hour, and at 3 miles per hour it cuts 2.73 acres per hour.
Table of Contents
- The Formula for a 10 Foot Cutter
- The Main Rate Worked Out Step by Step
- How Many Acres Can a 10 Foot Bush Hog Cut Per Hour by Speed and Efficiency
- How Long a 10 Foot Cutter Takes for 10 and 20 Acres
- What Speed and Efficiency to Use for a 10 Foot Cutter
- How a 10 Foot Cutter Compares With Smaller Widths
- Common Mistakes With a 10 Foot Rate
- Frequently Asked Questions
- Plan From Your Speed and Efficiency
The Formula for a 10 Foot Cutter
Acres per hour equals width in feet times speed in miles per hour times efficiency, divided by 8.25. Efficiency is written as a decimal in the formula, so 75 percent is 0.75 and 65 percent is 0.65. The constant 8.25 comes from 43560 divided by 5280. That is the number of square feet in an acre divided by the number of feet in a mile.
For a 10 foot cutter, the width is fixed at 10, so the rate depends only on speed and efficiency. Multiply 10 by speed, multiply by efficiency as a decimal, and divide by 8.25. The full formula is in the guide on how to calculate acres per hour, and the Acres Per Hour Calculator on the homepage uses it too.
Time comes from acres divided by acres per hour. That gives hours. Multiply the decimal part by 60 to get minutes. For example, 2.75 hours is 2 hours plus 0.75 times 60 minutes, which is 2 hours and 45 minutes. Keep the rate next to the time in your plan, so you can see which speed and efficiency produced which time.
The Main Rate Worked Out Step by Step
Take a 10 foot cutter at 4 miles per hour and 75 percent efficiency. This is the main rate in this guide, and it comes from the page table at 4 miles per hour. Work through it in steps so you can check the result by hand.
First multiply width by speed. 10 times 4 equals 40. Then multiply by efficiency as a decimal. 40 times 0.75 equals 30. Then divide by 8.25. 30 divided by 8.25 equals 3.64 acres per hour after rounding. The full result before rounding is 3.6363 acres per hour.
Now take the same cutter at 4.5 miles per hour and 75 percent efficiency. First multiply width by speed. 10 times 4.5 equals 45. Then multiply by efficiency. 45 times 0.75 equals 33.75. Then divide by 8.25. 33.75 divided by 8.25 equals 4.09 acres per hour after rounding. The full result before rounding is 4.0909 acres per hour.
The difference between the two rates is 4.09 minus 3.64, which equals 0.45 acres per hour. That is the gain from raising speed by 0.5 miles per hour while holding efficiency at 75 percent. It is a real gain only if 4.5 miles per hour is a cutting speed you can hold on that ground. If thick growth or rough ground forces you back to 4 miles per hour, the rate goes back to 3.64 acres per hour.
How Many Acres Can a 10 Foot Bush Hog Cut Per Hour by Speed and Efficiency
The table below holds cutter width fixed at 10 foot and changes speed and efficiency. Find your speed in the first column, then read across to your efficiency. Every cell was recalculated from the formula in this task. Times in this guide use the unrounded rate, and only the final value is rounded.
| Speed in miles per hour | Rate at 65 percent efficiency | Rate at 75 percent efficiency | Rate at 85 percent efficiency |
|---|---|---|---|
| 2 | 1.58 acres per hour | 1.82 acres per hour | 2.06 acres per hour |
| 3 | 2.36 acres per hour | 2.73 acres per hour | 3.09 acres per hour |
| 4 | 3.15 acres per hour | 3.64 acres per hour | 4.12 acres per hour |
| 4.5 | 3.55 acres per hour | 4.09 acres per hour | 4.64 acres per hour |
| 5 | 3.94 acres per hour | 4.55 acres per hour | 5.15 acres per hour |
| 6 | 4.73 acres per hour | 5.45 acres per hour | 6.18 acres per hour |
Check one cell by hand. At 3 miles per hour and 65 percent efficiency, 10 times 3 equals 30, 30 times 0.65 equals 19.5, and 19.5 divided by 8.25 equals 2.36 acres per hour after rounding. At 5 miles per hour and 85 percent efficiency, 10 times 5 equals 50, 50 times 0.85 equals 42.5, and 42.5 divided by 8.25 equals 5.15 acres per hour after rounding.
How Long a 10 Foot Cutter Takes for 10 and 20 Acres
Start from the main rate. At 3.64 acres per hour, 10 acres needs 10 divided by 3.64, which equals 2.75 hours, or 2 hours and 45 minutes. Twenty acres needs 20 divided by 3.64, which equals 5.50 hours, or about 5 hours and 30 minutes. Those are cutting times only. Travel, fuel stops, and time spent clearing debris sit outside those times.
For thick growth, use the slower rate. At 2.73 acres per hour, which is 3 miles per hour and 75 percent efficiency, 10 acres needs 10 divided by 2.73, which equals 3.67 hours, or about 3 hours and 40 minutes. Twenty acres needs 20 divided by 2.73, which equals 7.33 hours, or about 7 hours and 20 minutes. Even with a wide cutter, thick growth needs a realistic plan, because 20 acres at that rate is still a full day of cutting.
At the faster rate, 4.09 acres per hour, 10 acres needs 10 divided by 4.09, which equals 2.44 hours, or about 2 hours and 27 minutes. Twenty acres needs 20 divided by 4.09, which equals 4.89 hours, or about 4 hours and 53 minutes. The saving on 20 acres is 5.50 hours minus 4.89 hours, which equals 0.61 hours, so about 37 minutes saved by raising speed from 4 to 4.5 miles per hour.
What Speed and Efficiency to Use for a 10 Foot Cutter
Set efficiency at 75 percent to start on average pasture. That figure sits at the top of the average band, which runs 70 to 75 percent on this site. Choose 65 percent for a small or irregular field, for thick growth, or for a field with many obstacles. Choose 85 percent only for a large rectangular field with long straight passes and little stopping. The ideal band is 85 to 90 percent, and it fits ideal fields with GPS guidance only. Read the guide on understanding field efficiency for how turning and overlap lower efficiency.
Set speed at 4 miles per hour to start on average pasture. That is the speed in the page table, and most operators can hold it while cutting cleanly. Set speed at 3 miles per hour for thick tall woody growth, since thick tall woody growth needs slower speeds. Walk the field first and mark what you find, since rocks, stumps, and ditches force detours and lower efficiency. On slopes, slow down further and plan each pass for the slope.
How a 10 Foot Cutter Compares With Smaller Widths
A wide cutter earns its keep when the step up saves real time. The short table below keeps only the 10 foot row, and the prose beside it gives the smaller widths for comparison. Every cell was recalculated from the formula in this task.
| Cutter width | Acres per hour at 4 miles per hour and 75 percent efficiency | Hours for 10 acres |
|---|---|---|
| 10 foot | 3.64 | 2.75 |
On 10 acres, the 10 foot cutter needs 2.75 hours. A 6 foot cutter needs 4.58 hours on the same ground, so the step up saves 1.83 hours, or about 1 hour and 50 minutes. A 4 foot cutter needs 6.88 hours, so the step up from 4 foot saves 4.13 hours. Those savings hold only when the tractor keeps 4 miles per hour with the wider cutter, so confirm the speed you can actually hold before you count on the faster time.
Common Mistakes With a 10 Foot Rate
First, never plan from width and speed alone and leave efficiency at 100 percent. That is the top rate on paper, not the rate the field will return. At 4 miles per hour, 100 percent efficiency gives 4.85 acres per hour, since 10 times 4 divided by 8.25 equals 4.85, while the field rate at 75 percent efficiency is 3.64. Always set efficiency below 100 percent.
Second, never enter machine width where working width belongs. Measure the fresh cut strip after overlap and use that figure. Third, never enter top speed where average cutting speed belongs. Average cutting speed means the speed you keep while the deck cuts cleanly, through slower ground, turns, and obstacles. Use that average.
Fourth, never copy a rate from another site without reading its inputs. One competitor gives only a range of 2 to 3.5 acres per hour, and another gives only one row at 2.2 acres per hour. Those figures may suit a smaller cutter or a slower speed, but they do not describe a 10 foot cutter at 4 miles per hour and 75 percent efficiency unless the inputs match. Check the inputs beside any rate, then work the formula with your own figures.
Frequently Asked Questions
Q: How many acres can a 10 foot bush hog cut per hour?
A: A 10 foot bush hog cuts 3.64 acres per hour at 4 miles per hour and 75 percent efficiency. At 4.5 miles per hour it cuts 4.09 acres per hour, and at 3 miles per hour it cuts 2.73 acres per hour.
Q: How long does it take a 10 foot bush hog to cut 10 acres?
A: At 4 miles per hour and 75 percent efficiency, 10 acres takes 2.75 hours, or 2 hours and 45 minutes. At 4.5 miles per hour it takes 2.44 hours.
Q: How long does it take a 10 foot bush hog to cut 20 acres?
A: At 4 miles per hour and 75 percent efficiency, 20 acres takes 5.50 hours, or about 5 hours and 30 minutes. At 4.5 miles per hour it takes 4.89 hours.
Q: What efficiency should I use for a 10 foot bush hog?
A: Begin at 75 percent for average pasture. Move down to 65 percent when the field is small or irregular, when growth is thick, or when obstacles break the passes. Hold 85 percent for a large rectangular field with long straight passes.
Q: How many acres can a 10 foot bush hog cut at 3 miles per hour?
A: At 3 miles per hour and 75 percent efficiency, a 10 foot cutter covers 2.73 acres per hour, so 10 acres takes 3.67 hours, or about 3 hours and 40 minutes. At 65 percent efficiency it covers 2.36 acres per hour, so 10 acres takes 4.23 hours.
Q: Why is my 10 foot bush hog slower than 3.64 acres per hour?
A: The most likely causes are a lower working speed, a lower efficiency, or a smaller working width than the full 10 foot. Look back at the speed you held and the fresh cut width on each pass.
Plan From Your Speed and Efficiency
That is how many acres can a 10 foot bush hog cut per hour on your own ground: a result from speed and efficiency at a fixed width of 10 foot, not a single number. Start from 3.64 acres per hour at 4 miles per hour and 75 percent efficiency, take 4.09 at 4.5 miles per hour if you can hold that speed, and take 2.73 at 3 miles per hour for thick growth. Plan the time for your field size before you start, and check your own figures in the Bush Hog Acres Per Hour Calculator before your next job. For cost planning, use the live bush hogging cost calculator. The bush hog rotary cutter productivity guide gives the general productivity view.
