Best for lawns smaller than a half-acre or for trimming after a tractor. Self-propelled models are best for hills; non-driven push-types are fine for small, flat lawns.

But models we’ve tested have been loud enough for us to recommend hearing protection. They also create exhaust emissions, and require regular tune-ups.

Price range $150 to $400 for push; $200 to $800 for self-propelled models.

Best for small, flat lawns. All offer push-button starting and quieter running, create no exhaust emissions, and require no tune-ups. Corded mowers weigh less than gas and cordless models.

But they’re less capable than gas mowers and aren’t self-propelled. Cordless models also limit run time per battery charge.

Price range $200 to $300 for corded mowers; $300 to $450 for cordless models.

Best for lawns one-half acre or more. Most mow a swath 42 to 48 inches wide and accept snow throwers and other tools. Some models offer tighter turning.

But you’ll need a 4x6-foot storage space. Tighter turning costs extra. Snow throwers and other add-ons tend to be pricey and hard to install and remove.

Price range $1,000 to $2,800; $2,700 to $3,500 for models with tight turning.

Best for flatter lawns one-half acre or more with lots of trees, fence posts, and other obstacles. All have rear-wheel steering for tight turns around obstacles and reversing at the end of cutting laps.

But they’re pricier than most tractors, and steering can be difficult on hills. Rear-steering wheels can tear up grass on turns, and tillers for steering and ground speed take practice.

Price range $2,300 to $4,000 for most zero-turn-radius models built mostly for homeowners.