Battery and gas lawn mower costs are not just purchase prices. A gas mower can be cheaper up front but needs fuel, oil, spark plugs, filters, storage care, and more maintenance. A battery mower can cost more up front but has lower routine operating cost and less engine maintenance.
The better buy depends on yard size, grass thickness, slopes, runtime, battery ecosystem, and how long you keep the mower.
For small lawns, read Best Electric Lawn Mower for Small Yards.
Last updated: June 6, 2026.
Quick Answer
For small and medium suburban lawns, battery mowers often have the lower long-term cost if the battery lasts and the mower can finish the yard on one charge. Gas still makes sense for large, rough, wet, or remote properties where runtime and peak power matter more.
Cost Categories
| Cost | Battery mower | Gas mower |
|---|---|---|
| purchase price | moderate to high | low to high |
| energy | electricity | gasoline |
| maintenance | blade, battery care | oil, filter, plug, carburetor, fuel |
| storage | charge management | fuel stabilization |
| replacement parts | battery can be costly | engine parts and service |
| noise | lower | higher |
| emissions at use | none at point of use | exhaust emissions |
Operating Cost Formula
For battery mowers:
battery kWh x electricity rate x charges per season
For gas mowers:
gallons per mow x gas price x mows per season
Use your utility and local fuel price. EIA projected average U.S. residential electricity around 18.2 cents per kWh in 2026, but local rates vary widely.
Battery Replacement Is the Big Variable
Battery mowers look very cheap to run until the battery needs replacement. Before buying, check:
- battery warranty
- replacement battery price
- whether battery fits other tools
- availability from major retailers
- charger cost
- storage recommendations
Buying into a tool battery platform can lower future costs if you also need a blower, trimmer, or hedge trimmer.
Maintenance Difference
Battery mower maintenance:
- sharpen blade
- clean deck
- store battery correctly
- keep charger dry
Gas mower maintenance:
- sharpen blade
- clean deck
- oil changes
- spark plug
- air filter
- fuel stabilizer
- carburetor cleaning risk
If you pay for tune-ups, gas ownership cost rises.
When Gas Still Wins
Gas may be better for:
- large lawns
- thick wet grass
- tall grass after missed mowing
- rough terrain
- remote mowing without charging
- long sessions
- heavy self-propelled use
For a tiny flat yard, gas is usually more mower than necessary.
FAQ
Are battery mowers cheaper than gas?
Often over several years for small and medium lawns, but the answer depends on battery life, mower price, fuel price, and maintenance.
How long do mower batteries last?
It varies by brand, chemistry, storage, heat, charging habits, and use. Check warranty and replacement cost before buying.
Is a corded mower cheaper?
For very small yards near outlets, corded electric can be the cheapest powered option, but cord management is a real limitation.
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- DIY Lawn Care Schedule for Beginners