Is a gas or electric mower cheaper in the long run?

It depends on mowing frequency and local fuel and power prices. Electric mowers usually cost more up front but much less to run, so for regular, multi-year use they are typically cheaper overall, while light use can keep a cheaper gas model ahead.

Do electric mowers really cost less to run?

Yes. A typical mow uses only a fraction of a kilowatt-hour, costing cents, while gas and oil cost more. Electric mowers also avoid oil changes, spark plugs, filters and fuel, cutting yearly maintenance to little more than blade sharpening.

How long do mower batteries last, and are they worth it?

Most lithium mower batteries last about 3 to 6 years before capacity drops. Replacements cost roughly $100 to $250. Spread over the battery's lifespan, the low running cost usually keeps electric mowers competitive.

What factors most affect the cost comparison?

Mowing frequency and duration, the purchase price gap, and local gas and electricity rates have the biggest impact. Heavy mowing raises gas fuel costs quickly, while a large upfront price gap or short ownership period favors the cheaper machine.

Gas vs Electric Lawn Mower Cost Calculator

Mowing Usage

Mowing time per session (minutes)

Mowing sessions per year (times/year)

Years to compare (ownership period)

Gas Mower

Purchase price

Fuel use (gallons/hour)

Gas price (per gallon)

Annual maintenance (oil, plugs, blade)

Electric Mower

Purchase price

Power rating (watts)

Electricity rate (per kWh)

Annual maintenance (blade, cleaning)

Battery replacement cost (enter 0 if corded)

Battery lifespan (years)

Lowest Lifetime Cost

Gas Mower

Purchase price

Lifetime fuel

Lifetime maintenance

Annual running cost

Total cost

Electric Mower

Purchase price

Lifetime electricity

Lifetime maintenance

Lifetime battery

Annual running cost

Total cost

Overview

The Gas vs Electric Lawn Mower Cost Calculator helps homeowners, renters, and lawn-care buyers settle one of the most common questions before a purchase: which mower is actually cheaper once you account for everything, not just the sticker price. A gas mower often costs less up front but burns fuel and needs regular tune-ups, while an electric mower costs more to buy but runs on cheap electricity with far less servicing.

This tool weighs purchase price, fuel or electricity, routine maintenance, and battery replacement across the full number of years you plan to own the machine. It's built for anyone comparing two specific models, deciding whether to switch from gas to electric, or simply trying to budget the true long-term cost of keeping a lawn tidy.

How It Works

Enter how long a single mow takes and how many times you mow in a year — this sets the engine run time both mowers share.
Fill in the gas mower details: purchase price, fuel use per hour, local gas price, and yearly maintenance.
Fill in the electric mower details: purchase price, power rating in watts, your electricity rate, maintenance, and battery replacement cost and lifespan (enter 0 for a corded model).
Set how many years you plan to compare, then click Calculate Cost Comparison to see a full side-by-side breakdown and the cheaper option.

Formula Explanation

Every figure is derived from your inputs using straightforward, real-world math. First the calculator works out the shared annual run time:

Run hours/year = (Minutes per session × Sessions per year) ÷ 60

Gas running cost is based on fuel burned over those hours:

Gas fuel/year = Run hours × Gallons per hour × Gas price

Electric running cost converts power draw into kilowatt-hours, then prices it:

Electric cost/year = Run hours × (Watts ÷ 1000) × Rate per kWh
Battery cost/year = Battery replacement cost ÷ Battery lifespan

Finally, each mower's lifetime total adds the one-time purchase to the running costs over your chosen period:

Total = Purchase + (Annual running cost × Years)

The break-even point shows the year in which the cheaper-to-run mower overtakes the cheaper-to-buy one in cumulative savings.

Practical Benefits

See past the sticker price. A cheaper mower on day one can cost far more by year five — this shows the full picture before you buy.
Budget with confidence. Get a realistic annual running cost for either machine so there are no surprises each mowing season.
Compare any two models. Plug in the exact specs of the mowers you're weighing instead of relying on generic "gas vs electric" claims.
Factor in battery reality. Battery packs wear out and aren't cheap — the calculator amortizes that cost so electric estimates stay honest.
Justify the switch. Find out exactly how many years it takes for an electric mower to pay back its higher upfront price.

Frequently Asked Questions

It depends on how much you mow and your local fuel and power prices. Electric mowers usually cost more up front but far less to run, so for most homeowners who mow regularly for several years, electric comes out cheaper overall. Light, infrequent use can keep a cheaper gas model ahead — which is exactly what this calculator pins down for your situation.

Yes, in almost every case. A typical mow uses only a fraction of a kilowatt-hour of electricity, costing cents, whereas gas and oil for the same job cost noticeably more. Electric mowers also skip oil changes, spark plugs, filters, and fuel stabilizer, which cuts yearly maintenance to little more than blade sharpening.

Most lithium mower batteries last around 3 to 6 years or several hundred charge cycles before capacity drops noticeably. A replacement pack can cost $100–$250, which is why the calculator spreads that cost across the battery's lifespan. Even with replacements, the low running cost usually keeps electric competitive — the tool shows whether it does for you.

The biggest levers are how often and how long you mow, the gap in purchase price, and your local gas and electricity rates. Heavy mowing magnifies gas fuel costs quickly, while a large upfront price difference or short ownership period favors the cheaper machine. Adjust the inputs to see how sensitive the result is to each one.

Disclaimer: This calculator provides estimates for general informational and budgeting purposes only. Actual costs vary with mower model, usage habits, terrain, local energy prices, maintenance practices, and battery condition. Results should not be treated as financial, mechanical, or purchasing advice. Always verify specifications and current prices before making a buying decision.