Lawn mower

Gas mower or battery mower?

What each costs to run for a year. Fill in what you know; anything you leave blank uses a typical rating or United States (national average)'s average price.

Your numbers

Your state (for average prices)

Gasoline the mower uses a season gallons

Count the cans you fill: a 2-gallon can twice is 4 gallons. Blank = 4.

Battery size watt-hours

Volts × amp-hours on the battery: 56 V × 5 Ah = 280 Wh. Blank = 280.

Full charges a season charges

About one per mowing for most yards. Blank = 25.

Charger efficiency %

Energy that reaches the battery. 85% is a reasonable guess if you do not know it. Blank = 85.

Prices blank = United States (national average) average

Gasoline price $ per gallon

Electricity price $ per kWh

Your bill's price per unit, taxes and delivery charges included, is the most accurate number. Where the averages come from

Purchase prices and CO2 (optional)

Price of the gas model $

Price of the electric model $

Rebates or credits you will actually get for the electric one $

Your grid's CO2 per kWh kg CO2 per kWh

Payback is worked out only when both purchase prices are filled in. Count only rebates or credits you know you qualify for.

Fill in what you know, then Compare

Pressing Compare with every box blank shows the typical case with United States (national average)'s average prices. Then change one number at a time to see what moves the result.

Gasoline the mower uses a season4 gallons
Battery size280 watt-hours
Full charges a season25 charges
Charger efficiency85 %

Household Ledger $1.95/month or $19.50/year, or $1.00 for one printable report Free during preview