Mowers
What Size Mower for 4 Acres With Hills? Tractor, Sessions, Meadow
Quick answer
Four acres with hills need a 54 to 60 inch lawn tractor rated for your slope. The largest catalog tractors have 54 inch decks, and the Husqvarna TS 375XD takes about 2 hr 57 min on 4 hilly acres. The computed table's faster 54 and 60 inch times assume zero-turn speed, which is not recommended on slopes.
Four hilly acres is a large mowing job, and the computed table can mislead. It shows a 54 inch zero-turn at about 2 hr 3 min, but that assumes 6.5 mph on a machine that steers and brakes only with its rear wheels. The recommended machine is a lawn tractor, and at 4.5 mph a 54 inch tractor takes about 2 hr 57 min.
Three hours every week is a lot of time on slopes. This page covers the real tractor times, how to read long slopes, and the step many owners of hilly acreage eventually take: mowing less of it.
On this page
- How long does it take to mow 4 acres with hills?
- How long does a tractor take on 4 hilly acres?
- How do I read a long slope on acreage?
- Best riding mower for 4 acres with hills?
- Why does mowing up and down take so long on 4 acres?
- Should I mow all 4 acres or let some go to meadow?
- Which mowers suit 4 hilly acres?
How long does it take to mow 4 acres with hills?
| Mower | Time per mow | Fit for this lawn |
|---|---|---|
| 21 in walk-behind | 11 hr 23 min | Slow for this size |
| 30 in rider | 5 hr 19 min | Slow for this size |
| 42 in lawn tractor | 3 hr 48 min | Slow for this size |
| 46 in lawn tractor | 3 hr 28 min | Slow for this size |
| 48 in zero-turn | 2 hr 18 min | Zero-turn: not advised on slopes |
| 54 in zero-turn | 2 hr 3 min | Zero-turn: not advised on slopes |
| 60 in zero-turn | 1 hr 50 min | Zero-turn: not advised on slopes |
Recommended deck: 54 to 60 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 long does a tractor take on 4 hilly acres?
Tractor times at 4.5 mph and 65 percent efficiency for hills. The 60 inch row is for comparison, since no lawn tractor that size is in the catalog.
| Machine | Time per mow | 26 mows | 32 mows | Sessions |
|---|---|---|---|---|
| 46 in lawn tractor, Husqvarna TS 120 46 in. Lawn Tractor | 3 hr 28 min | 90.1 hr | 110.9 hr | Three of about 70 min |
| 54 in lawn tractor, Husqvarna TS 375XD 54 in. Lawn Tractor | 2 hr 57 min | 76.7 hr | 94.4 hr | Two of about 90 min |
| 60 in tractor class, 60 inch garden tractor | 2 hr 39 min | 68.9 hr | 84.8 hr | Two of about 80 min |
| 54 in zero-turn (not recommended on slopes) | 2 hr 3 min | 53.3 hr | 65.6 hr | Not applicable |
How do I read a long slope on acreage?
Measure several points along the slope, not only the top, with a 48 inch level or a phone inclinometer on a board. Percent slope is rise over run times 100. A 10 percent slope is about 5.7 degrees and drops 20 feet over a 200 foot run. A 15 percent slope is about 8.5 degrees, a 20 percent slope about 11.3 degrees, and a 30 percent slope about 16.7 degrees and 60 feet of drop over 200 feet. Long slopes often steepen near the bottom, at ditches and creek banks, which is exactly where riders roll. Compare the steepest reading with the manual limit, which is usually stated in degrees.
Best riding mower for 4 acres with hills?
The Husqvarna TS 375XD 54 in. Lawn Tractor: a 24 HP, 726cc Kawasaki FR V-twin, a fabricated 54 inch 3-blade deck and a differential lock that turns both rear wheels together for traction on damp grades. The Husqvarna TS 140X 54 in. Lawn Tractor is the lower-cost 54 inch hydrostatic option. Heavier garden tractors with 60 inch decks exist through dealers, but greater weight does not raise the safe slope, so check any model's manual limit before assuming it handles your land. See lawn tractor vs garden tractor.
Why does mowing up and down take so long on 4 acres?
Every strip has a turn at the top and bottom, and every climb is slower than the descent. The model shows this as 65 percent efficiency versus 80 percent on flat ground, about 23 percent more time, which on a 54 inch tractor is the difference between about 2 hr 24 min and 2 hr 57 min. Lay out strips so turns land on level ground. Mowing across would be faster but risks a sideways rollover, so riders go up and down only.
Should I mow all 4 acres or let some go to meadow?
Think seriously about leaving some unmowed. Taking the steepest acre out of weekly mowing saves about 44 minutes per mow with a 54 inch tractor, roughly 19 hours over a 26 mow season, and it removes the riskiest ground. A meadow is typically cut once or twice a year, often late in the season, with a trimmer, a walk-behind brush mower or a hired operator. Robots can cover steep zones too: the Mammotion LUBA 3 AWD 5000 Robot Mower is rated for 80 percent slopes on 1.25 acres. Steep banks you keep as lawn go to a rear-drive walk-behind such as the SENIX 22 in. Variable Speed RWD Self-Propelled Gas Mower, 201cc, mowed across. See mowing on slopes safely.
Which mowers suit 4 hilly acres?
Lawn tractors for the main slopes, a walk-behind for banks and robots rated for steep ground. See the best mowers for hills.
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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Husqvarna TS 140X 54 in. Lawn Tractor
$3,780.00Steps up to a 24 HP Briggs PXi engine, a 3-blade 54-inch deck and a 3-gallon tank on a Tuff Torq hydrostatic transmission.
Best for: Larger open lawns
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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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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
How long does it take to mow 4 acres with hills?
About 2 hr 57 min with a 54 inch lawn tractor and 3 hr 28 min with a 46 inch tractor, at 4.5 mph and 65 percent efficiency for hills. A 54 inch zero-turn is modeled at about 2 hr 3 min but is not recommended on real slopes. Many owners split the tractor job into two sessions of about 90 minutes.
Is there a 60 inch lawn tractor for hills?
Heavier garden tractors with decks around 60 inches are sold through dealers, but the largest lawn tractors in our catalog have 54 inch decks. A 60 inch tractor class machine would cut 4 hilly acres in about 2 hr 39 min versus 2 hr 57 min. Weight and deck size do not raise the operator manual slope limit.
How often should I mow a meadow area?
Usually once or twice a year. Many extension and conservation programs suggest a late-season cut, after most plants have set seed and nesting activity has passed, to keep woody growth from taking over. A string trimmer with a brush blade, a walk-behind brush mower or a hired operator handles it. Check local rules on grass height near roads and neighbors.
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.