Mowers
What Size Mower for 2 Acres With Hills? Best Riding Mower Setup
Quick answer
Two acres with hills need a 42 to 48 inch lawn tractor rated for your slope, not a zero-turn. A 46 inch tractor takes about 1 hr 44 min on hilly ground, and a 42 inch about 1 hr 54 min. The hydrostatic Husqvarna TS 120 46 in. fits. Mow straight up and down, never across.
Two hilly acres rarely have one kind of slope. Most have a large area of gentle grade a tractor handles well, a few steeper strips that need a walk-behind, and at least one bank no one should mow. The best setup splits the lot by slope instead of forcing one machine to do everything.
The computed recommendation is a 42 to 48 inch lawn tractor. Front-wheel steering and a hydrostatic pedal keep control on grades where a zero-turn, which steers and brakes with its rear wheels, can slide on damp grass.
On this page
How long does it take to mow 2 acres with hills?
| Mower | Time per mow | Fit for this lawn |
|---|---|---|
| 21 in walk-behind | 5 hr 41 min | Slow for this size |
| 30 in rider | 2 hr 39 min | Slow for this size |
| 42 in lawn tractor | 1 hr 54 min | Recommended |
| 46 in lawn tractor | 1 hr 44 min | Recommended |
| 48 in zero-turn | 1 hr 9 min | Zero-turn: not advised on slopes |
| 54 in zero-turn | 1 hr 1 min | Zero-turn: not advised on slopes |
| 60 in zero-turn | 55 min | Zero-turn: not advised on slopes |
Recommended deck: 42 to 48 inches, lawn tractor rated for your slope (front-wheel steering holds a line on grades better than a zero-turn). Times assume typical cutting speeds (3 mph walk-behind, 4.5 mph tractor, 6.5 mph zero-turn), a 15 percent overlap and 65 percent efficiency for this terrain.
How steep are my slopes in percent and degrees?
Measure with a level and tape, or with a phone inclinometer on a straight board. Then convert. The last column shows the vertical drop over a 50 foot slope, a common length on a 2 acre lot.
| Percent | Degrees | Rise per 10 ft | Drop over a 50 ft slope |
|---|---|---|---|
| 10 percent | 5.7 | 12 in | 5 ft |
| 15 percent | 8.5 | 18 in | 7.5 ft |
| 20 percent | 11.3 | 24 in | 10 ft |
| 30 percent | 16.7 | 36 in | 15 ft |
Compare against the operator manual limit, usually given in degrees, for dry grass.
What is the best way to mow 2 hilly acres?
An example plan, not a rule: 1.6 acres within the tractor manual limit, 0.3 acre of steeper grade you can still walk across, and 0.1 acre of bank too steep to mow.
| Area | Tool | Direction | Time estimate |
|---|---|---|---|
| 1.6 acres, gentle grade | 46 in lawn tractor, Husqvarna TS 120 46 in. Lawn Tractor | Straight up and down | about 1 hr 23 min |
| 0.3 acre, steeper strips | 22 in RWD walk-behind, SENIX 22 in. Variable Speed RWD Self-Propelled Gas Mower, 201cc | Across the slope | about 49 min |
| 0.1 acre, steep bank | String trimmer, ECHO SRM-2620T 25.4cc High Torque Gas String Trimmer, or groundcover | From stable footing | varies; groundcover removes it |
Tractor and walk-behind times use 65 percent efficiency for hills at 4.5 and 3 mph. Your split will differ, so measure your own slopes.
Best riding mower for 2 acres with hills?
A 42 to 48 inch hydrostatic lawn tractor. The Husqvarna TS 120 46 in. Lawn Tractor is the value pick, and the Husqvarna TS 120 42 in. Lawn Tractor saves money at the cost of about 10 more minutes. If you need more traction on damp ground, the Husqvarna TS 375XD 54 in. Lawn Tractor adds a differential lock, which makes both rear wheels drive together. Its 54 inch deck is above this page's range and saves time only on the open parts. A differential lock helps traction but does not change the manual slope limit.
Is mowing hills up and down less efficient?
Yes. A tractor turns at the top and bottom of every strip and slows on climbs, which is why 2 hilly acres take about 1 hr 44 min with a 46 inch tractor instead of 1 hr 24 min on flat ground. Mowing across would be quicker but risks a sideways rollover, so it is off the table for riders. With a walk-behind, mowing across is the correct and safer direction. Plan strips so turns happen on level ground at the top or bottom.
Could a robot mower take over the steep parts?
Yes. A slope-rated robot can own the steep section while you ride the gentle part, or cover the entire lot. The Husqvarna Automower 440iQ Robot Mower is rated for 2 acres on 45 percent slopes. The Mammotion LUBA 3 AWD 5000 Robot Mower is rated for 80 percent slopes on 1.25 acres, which suits a steep zone within a larger property. See the best robot mowers for hills and mowing on slopes safely.
Which mowers suit 2 hilly acres?
Husqvarna TS 120 46 in. Lawn Tractor
$3,185.00A 22 HP Briggs PXi engine with a Tuff Torq hydrostatic transmission and a 46-inch 2-blade deck, rated at 5 mph forward.
Best for: Mid-size lawns with some obstacles
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Husqvarna TS 120 42 in. Lawn Tractor
$2,799.00A 19 HP, 540cc Briggs & Stratton engine, 42-inch twin-blade stamped deck and pedal-operated transmission, the lowest-cost way onto a seat in this list.
Best for: Smaller, fairly flat properties
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Husqvarna TS 375XD 54 in. Lawn Tractor
$5,199.00A 24 HP, 726cc Kawasaki FR V-twin, a fabricated 54-inch 3-blade deck and a differential lock for traction make this the heavy-duty tractor pick.
Best for: Big properties with slopes or damp ground
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SENIX 22 in. Variable Speed RWD Self-Propelled Gas Mower, 201cc
$509.99Variable-speed rear-wheel drive and a single-handle, four-wheel synchronized height adjuster sit on a 201cc, 22-inch 3-in-1 platform with a 2-year warranty.
Best for: Larger yards where you want to set your own pace
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Husqvarna Automower 440iQ Robot Mower
$2,649.99The largest iQ model is rated for up to 2 acres on 45% slopes, using EPOS positioning instead of boundary wire, with GPS theft tracking and a 4-year warranty.
Best for: Large lawns up to 2 acres
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Mammotion LUBA 3 AWD 5000 Robot Mower
$3,299.00360-degree LiDAR, network RTK and dual-camera vision combine for navigation, with four-motor drive for 80% slopes and a rated 1.25 acres.
Best for: Steep or complex lawns up to 1.25 acres
Check price on AmazonHow we chose
We did not test these products in person. Picks are researched from manufacturer specifications and owner manuals, engine and safety certifications where they apply, warranty terms, public recall records, and the recurring themes in verified owner reviews. We favor established brands with large review counts and parts support, match each pick to a real yard size or task, and place it in the tier where its price and capability actually belong.
Frequently asked questions
What is the best mower for 2 acres of hills?
A 42 to 48 inch hydrostatic lawn tractor rated for your slope, used straight up and down, plus a rear-wheel-drive walk-behind for steeper strips and a trimmer or groundcover for banks. A 46 inch tractor takes about 1 hr 44 min on 2 hilly acres. A slope-rated robot mower can replace the walk-behind work or the whole job.
How long does it take to mow 2 acres with hills?
About 1 hr 44 min with a 46 inch lawn tractor and 1 hr 54 min with a 42 inch, using 65 percent efficiency for hills. A 48 inch zero-turn would take about 1 hr 9 min but is not recommended on real slopes. The same 2 acres on flat ground take about 1 hr 24 min with the 46 inch tractor.
Does a differential lock make a tractor safe on hills?
It improves traction, not stability. A differential lock drives both rear wheels together so one does not spin on wet or loose ground, which the Husqvarna TS 375XD offers. It does not raise the operator manual slope limit or prevent a rollover. Keep to the rated slope, go straight up and down, and avoid wet grass.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.