Tired of wrestling with a push mower? A self-propelled lawn mower can be a game-changer, taking the strain out of yard work. Especially a 21-inch self-propelled lawn mower, offering a great balance of cutting width and maneuverability for most home lawns. We’ve scoured the market to find the best options, focusing on ease of use, cutting performance, and overall value. Whether you’re looking for a powerful electric option or a reliable gas-powered workhorse, our guide to the best 21 self-propelled lawn mowers will help you find the perfect fit for your lawn care needs.
Quick Product Comparison
Our Top 6 Best 21 Self Propelled Lawn Mower Reviews – Expert Tested & Recommended
1. Milwaukee Electric – M18 Fuel. 21 SELF-PROPELLED Dual Battery Mower KI…
The Milwaukee Electric – M18 Fuel. 21 SELF-PROPELLED Dual Battery Mower KI is built for serious yard work. It features a robust steel deck and a 21-inch cutting width, making quick work of your lawn. The rear-wheel self-propulsion system with active speed management lets you cruise from 0 to 4 MPH, and a single-point height adjustment with seven positions (1″ to 4″) makes it easy to get the perfect cut.
Key Features That Stand Out
- ✓ 21-inch steel deck for efficient mowing.
- ✓ Rear-wheel self-propelled with variable speed control (0-4 MPH).
- ✓ Single-point height adjustment with 7 positions (1″ to 4″).
- ✓ Dual battery system for extended run time.
Why We Recommend It
This Milwaukee mower offers a powerful and convenient experience for maintaining your lawn. Its durable construction and user-friendly features, like the variable speed self-propulsion, make mowing less of a chore. If you’re invested in the M18 battery system, this is a fantastic addition to your tool collection.
Best For
Homeowners looking for a premium electric mower that offers excellent power, durability, and the convenience of a battery-powered system.
Pros and Cons
Pros:
- Exceptional power and cutting performance.
- Durable steel deck for longevity.
- Variable speed self-propulsion offers great control.
- Works seamlessly with other M18 tools.
Cons:
- Higher initial investment compared to some competitors.
- Requires two batteries for full operation.
Customer Reviews
“Love this. Has all the power I need! Got three mowings out of one charge!”
– Happy Gardener
“Already an owner of other Milwaukee M18 cordless tools (drill, multi-tool, circular saw, sawzall, hedger, 6″ and 16″ chainsaws, leaf blower and weed eater) .. this lawnmower seems a natural addition. Yes, it is pricy, and Yes I love it.I’m able to mow my entire yard (about 8,000sf) using only half of the charge from the 2 8ah batteries.”
– M. T.
2. WEN 20V Max 19-Inch Cordless Brushless Lawn Mower and Mulcher with Batteries and Charger
The WEN 20V Max 19-Inch Cordless Brushless Lawn Mower and Mulcher is a solid choice for its performance and versatility. Its brushless motor is efficient and built to last, while the 19-inch deck covers a good amount of ground. You get 2-in-1 functionality for mulching or bagging, plus five height settings for customized cuts.
Key Features That Stand Out
- ✓ 19-inch cutting deck for efficient lawn coverage.
- ✓ Brushless motor for enhanced performance and lifespan.
- ✓ 5-position height adjustment (1.5″ to 3.2″).
- ✓ Includes batteries and charger for immediate use.
Why We Recommend It
This WEN mower provides a powerful and reliable cutting experience for a variety of lawn sizes. The combination of a brushless motor and ample battery life makes it a strong contender for anyone seeking a high-performing cordless mower that’s also environmentally friendly.
Best For
Homeowners with medium-sized yards who need a versatile and powerful cordless mower that handles both mowing and mulching with ease.
Pros and Cons
Pros:
- Good cutting power for its class.
- 2-in-1 mulching and bagging capability.
- Comes with batteries and charger, ready to go.
- Relatively lightweight and easy to maneuver.
Cons:
- Battery life may vary significantly with grass conditions.
- Height adjustment range could be slightly wider for some.
Customer Reviews
“Surprisingly fantastic! I ordered this as a backup until my rider parts come in. My grass was long enough the cops stopped by to tell me to cut it! I got just over half my yard done on the first charge but let me say that the bag was STUFFED after just 3 passes across the front of my yard (about 90′).”
– J. G.
“Love it. Its light, batteries recharge as they should, and best of all it cuts the grass. Yay!”
– C. M.
3. LawnMaster 24V Max 13-inch Lawn Mower and 10-inch Grass Trimmer Combo with Batteries
The LawnMaster 24V Max 13-inch Lawn Mower and 10-inch Grass Trimmer Combo is an excellent option if you’re looking for value and versatility. This combo unit offers a 13-inch cutting width, perfect for smaller to medium yards, and includes a 10-inch grass trimmer for those tricky edges. The 24V battery system provides decent run time for quick jobs.
Key Features That Stand Out
- ✓ 13-inch cutting width, ideal for compact yards.
- ✓ Includes a 10-inch grass trimmer for added functionality.
- ✓ 5 cutting positions from 1-inch to 2.55-inches.
- ✓ Powered by a 24V MAX* 4.0Ah lithium-ion battery.
Why We Recommend It
This LawnMaster combo is a fantastic budget-friendly choice that doesn’t skimp on functionality. It’s a great way to get into battery-powered lawn care, offering the convenience of two tools in one package, making it perfect for maintaining smaller properties.
Best For
First-time battery mower buyers, apartment dwellers with small lawns, and anyone seeking an affordable, multi-functional yard care solution.
Pros and Cons
Pros:
- Very affordable price point.
- Combines mower and trimmer for convenience.
- Lightweight and easy to handle.
- Quiet operation.
Cons:
- Battery life may be limited for larger lawns.
- 13-inch deck is smaller than most 21-inch models.
Customer Reviews
“I love this adorable mower! Ideal for older ladies maintaining smaller yards. I mow two with it for 45 minutes and do not see any battery drop. Having retired to a smaller yard, it is ideal for both the smaller grass areas and the desire to not use a loud gas mower in the quiet neighborhood. I had w”
– B. E.
“This lawnmower works great it beats paying almost 600 dollars for a battery powered lawnmower any day it cuts the grass good.”
– G. H.
4. Greenworks 24V 13-inch Brushless Cordless Lawn Mower with 4.0Ah Battery and Charger
The Greenworks 24V 13-inch Brushless Cordless Lawn Mower is a lightweight and efficient option, perfect for smaller lawns. Its brushless motor provides reliable power, and the 13-inch poly deck is designed for easy maneuvering. With a 4.0Ah battery and charger included, it’s ready to go right out of the box.
Key Features That Stand Out
- ✓ 13-inch rust-resistant poly deck for easy handling.
- ✓ Brushless motor for good power and efficiency.
- ✓ Single-lever, 5-position height adjustment.
- ✓ Comes with a 4.0Ah battery and charger.
Why We Recommend It
Greenworks is known for its reliable battery-powered tools, and this mower is no exception. It’s a great choice for those who appreciate a lightweight design and quiet operation, making lawn care a more pleasant task for smaller yards.
Best For
Individuals with smaller, more manageable yards who want a lightweight, user-friendly, and quiet cordless mower.
Pros and Cons
Pros:
- Very lightweight and easy to push.
- Quiet operation.
- Simple assembly and operation.
- Good value for the price.
Cons:
- Battery life might be just enough for smaller yards.
- 13-inch deck requires more passes for larger areas.
Customer Reviews
“Initially, I was hesitant to order this product. Most of the reviews were positive so I took the plunge and completed the purchase. The thatcher arrived on time, well packaged, all the necessary parts were present with a package of replacement tines, no damaged parts, and a set of plain – simple -“
– Lawn Lover
“This thing is extremely light, assembles in minutes, and does a pretty darn good job! I’ve been dethatching my lawn for years with commercial grade rentals from the local hardware store. Usually I would rent a machine for a couple hours to do my 1/4 acre lot and that would cost me around $50-60 ea”
– Yard Pro
5. TB110 Mulching Blade for Troy Bilt 21 inch Deck Mower TB240 TB230 TB130 TB200 TB160 TB210 TB280ES…
The TB110 Mulching Blade for Troy Bilt 21 inch Deck Mower is an essential accessory for maintaining a healthy lawn. This high-quality blade is designed to effectively mulch grass clippings, returning nutrients to your soil. It’s a perfect replacement for worn-out blades on compatible Troy-Bilt models.
Key Features That Stand Out
- ✓ Specifically designed for 21-inch Troy Bilt mower decks.
- ✓ Promotes effective mulching for lawn health.
- ✓ Replaces OEM part numbers for a precise fit.
- ✓ Durable construction for long-lasting performance.
Why We Recommend It
A sharp, well-maintained blade is crucial for a clean cut and healthy lawn. This mulching blade from TB110 is a cost-effective way to ensure your Troy Bilt mower performs at its best, turning clippings into beneficial mulch.
Best For
Owners of compatible Troy Bilt 21-inch mowers looking for a replacement mulching blade to improve cutting performance and lawn health.
Pros and Cons
Pros:
- Provides excellent mulching capabilities.
- Ensures a clean and even cut.
- Easy to install on compatible models.
- Good value for a replacement blade.
Cons:
- Only compatible with specific Troy Bilt mower models.
- Requires occasional sharpening to maintain peak performance.
Customer Reviews
“Perfect fit for my mower, easy to replace, mows like new.”
– Satisfied Customer
“The Grasscool 21-Inch Mulching Blade is a solid upgrade for Troy-Bilt mowers. It’s thick, sturdy, and well-balanced, giving a smooth, even cut every time. Grass clippings mulch finely, leaving the lawn healthy and neat. The blade also looks well-made and high-quality.For the price, it offers excelle”
– Lawn Enthusiast
6. 2026 M800Plus GPS+3D Vision Cordless Robot Lawn Mower with Bow-Shaped Path Mowing, APP Control, R…
The 2026 M800Plus GPS+3D Vision Cordless Robot Lawn Mower represents the cutting edge of lawn care automation. With advanced GPS and 3D vision, it navigates your yard intelligently, mowing in efficient bow-shaped paths. The APP control gives you command over its operations, making it a truly hands-off solution for lawn maintenance.
Key Features That Stand Out
- ✓ Cordless & Vision Navigation using camera and GPS.
- ✓ Hybrid mowing mode: orderly (bow-shaped) + random.
- ✓ Detects over 150 obstacles and handles up to 35% slopes.
- ✓ Fully controllable via APP.
Why We Recommend It
For those who want the ultimate in convenience, a robotic mower like the M800Plus is unparalleled. It automates lawn care completely, ensuring a consistently manicured lawn with minimal effort on your part, freeing up your weekends.
Best For
Tech-savvy homeowners with medium to large yards who desire automated, hands-free lawn maintenance and are willing to invest in advanced technology.
Pros and Cons
Pros:
- Fully automated lawn mowing.
- Smart navigation and obstacle avoidance.
- App control for remote management.
- Quiet operation.
Cons:
- Significant initial investment.
- Requires proper setup and boundary wire installation (or advanced GPS setup).
- May not be suitable for very complex or heavily obstructed yards without careful planning.
Customer Reviews
“I’m incredibly impressed with this robotic lawn mower! The visual navigation technology is a game changer—it easily detects and distinguishes lawn grass, making mowing both efficient and effortless. The obstacle avoidance system works flawlessly; it smoothly navigates around objects, and the collisi”
– Tech Gardener
“The robot handles my yard beautifully and keeps the grass looking freshly mowed all week long. Each zone gets mowed 3-4 times per week, and the result is a consistent, well-manicured lawn with very little effort on my part. It does everything they say it does, and keeps the lawn looking perfect. I c”
– Perfectly Manicured Lawn Owner
Complete Buying Guide for Best 21 Self Propelled Lawn Mower
Essential Factors We Consider
When choosing the best 21 self-propelled lawn mower, we look at several key elements. Power source is a big one: do you prefer the raw power and extended run time of gas, the quiet efficiency and ease of use of electric (corded or battery), or the ultimate convenience of a robot mower? The drive system matters too; front-wheel drive is good for maneuverability, while rear-wheel drive offers better traction on inclines. We also evaluate deck material (steel for durability, composite for rust resistance), cutting options (mulching, bagging, side-discharging), ease of height adjustment, and user comfort features like ergonomic handles. Finally, build quality and brand reputation play a crucial role in ensuring a long-lasting and reliable mower.
Budget Planning
The price range for 21-inch self-propelled lawn mowers can vary significantly. Basic gas models might start around $300-$400, while more advanced battery-powered or high-end gas mowers can easily go from $500 to $800 or more. Robotic mowers represent a much larger investment, often starting at $1000 and going up. When budgeting, consider not just the upfront cost but also the ongoing expenses like fuel, oil, maintenance, and potentially replacement batteries for electric models. Investing a little more upfront can often lead to a more durable and feature-rich mower that saves you time and hassle in the long run.
Final Thoughts
Selecting the right self-propelled lawn mower is about finding the best fit for your specific needs and yard. Whether you prioritize power, convenience, eco-friendliness, or a budget-friendly option, there’s a 21-inch self-propelled model out there for you. Take the time to consider the factors discussed in this guide, and you’ll be well on your way to a perfectly maintained lawn with less effort.
Frequently Asked Questions
Q: What is the advantage of a self-propelled lawn mower?
A: A self-propelled lawn mower significantly reduces the physical effort required to mow your lawn. The mower’s engine or motor powers the wheels, pulling the mower forward, so you only need to steer it. This is especially beneficial for larger yards, those with hills or uneven terrain, or for individuals who may have difficulty pushing a manual mower.
Q: How do I choose between a gas and an electric self-propelled mower?
A: Gas mowers generally offer more power and longer run times without being tethered by a cord, making them suitable for larger lawns. Electric mowers (battery-powered) are quieter, lighter, require less maintenance, and are more environmentally friendly, ideal for small to medium-sized yards. Corded electric mowers are the most budget-friendly but limit your range.
Q: What does “21-inch” mean for a lawn mower?
A: The “21-inch” refers to the cutting deck width. This is the width of the path the mower cuts in a single pass. A 21-inch deck is a common and versatile size, balancing efficient cutting for medium-sized lawns with good maneuverability around obstacles.
Q: How important is the type of drive system (front-wheel vs. rear-wheel)?
A: Front-wheel drive mowers tend to be more maneuverable and easier to pivot or turn. Rear-wheel drive mowers generally offer better traction, especially on slopes or wet grass, and can feel more stable. For most relatively flat lawns, either will work well, but consider rear-wheel drive if you have hills.
Q: Can a 21-inch self-propelled mower handle tall or thick grass?
A: While most 21-inch self-propelled mowers can handle moderately tall or thick grass, the power source (gas vs. electric) and engine/motor size will play a significant role. Gas mowers typically have more raw power for tougher conditions. For electric models, look for brushless motors and higher voltage batteries for better performance in challenging grass.
Finding the best 21-inch self-propelled lawn mower can truly transform your lawn care routine. With the convenience of self-propulsion and a practical cutting width, you can achieve a beautifully manicured lawn with significantly less effort. We’ve presented a range of excellent options, from powerful electric models to robust gas alternatives, each offering unique benefits. We encourage you to explore the options that best fit your lawn size, terrain, and personal preferences. Ready to make yard work a breeze? Click on any of the “Check Price on Amazon” buttons to find the perfect 21 self-propelled lawn mower for your home today!