Greenworks 40V 21 in Self-Propelled
#16 in Self-propelledFull review
A low cost self propelled mower for lawns up to about a third of an acre, best if you already own Greenworks 40V tools.
Amazon $465.99$465.99
The Greenworks 40V 21 in Self-Propelled rates 3.3 among self-propelled lawn mowers; the Greenworks 40V 16 in Push Mower rates 2.7 among push ones. The Greenworks 40V 16 in Push Mower costs $228 less ($237.99 vs $465.99).
Greenworks 40V 16 in Push Mower
#13 in PushFull review
A small, light push mower for postage stamp lawns and townhouse yards. Anyone with more than a quarter acre should look at a 20 or 21 in model.
Amazon $237.99$237.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different drive classes (self-propelled and push), and each is scored against the reference points for its own class, so a rating says how well each does among its own drive peers. How we rank explains each factor.
| Factor weight | Greenworks 40V 21 in Self-Propelled | Greenworks 40V 16 in Push Mower |
|---|---|---|
| Overall rating | 3.3/5 | 2.7/5 |
| Value 30% | 74 $22.19 per inch of deck ($465.99 with batteries and charger, 21 in deck) | 57 $14.87 per inch of deck ($237.99 with batteries and charger, 16 in deck) |
| Deck 20% | 12 21 in deck | 0 16 in deck |
| Power 15% | 14 200 Wh of battery included | 3 160 Wh of battery included |
| Cutting modes 15% | 100 3 ways to cut: bag, mulch, side discharge | 50 2 ways to cut: bag, mulch |
| Warranty 20% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Greenworks 40V 21 in Self-Propelled | Greenworks 40V 16 in Push Mower | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 16 in |
| Deck | Steel | Plastic |
| Cutting height | 1.2 to 3.6 in, 7 positions | 1.2 to 3.4 in, 5 positions |
| Bag | Yes | Yes |
| Mulch | Yes | Yes |
| Side discharge | Yes | No |
| Power | ||
| Power | Battery | Battery |
| Engine or battery | 40 V, 5 Ah of battery | 40 V, 4 Ah of battery |
| Battery energy | 200 Wh | 160 Wh |
| Battery included | Yes | Yes |
| Runtime | 40 min | 40 min |
| Brushless motor | Yes | No |
| Build | ||
| Drive | Rear-wheel drive | Push |
| Folds upright | Yes | Yes |
| Weight | 61.7 lb | 37.8 lb |
| Warranty | 3 years | 3 years |
| Battery warranty | 3 years | 3 years |
| Released | 2024-01-20 | - |