Robot Mower Calculator

This calculator will allow you to analyze the total cost (time and money) required to mow your lawn by gas mower, battery mower, and robot mower.

How big is your yard?
How many times would you like it mowed per month?
How long is the growing season (months)?
 Mow yourself (gas engine)Mow yourself (battery powered)Pay someone to mow itUse robot mower *
 Size (in)? Size (in)?    
Cost cost ($)time (hr)cost ($)time (hr)cost ($) cost ($)time (hr)
Per mow00
Monthly 00
Annual (maint.)
Total year 1
Total subsequent years
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About this calculator…

This calculator was designed to help you decide what the best way to mow your yard is. Should you mow it yourself? And if so, should you buy a traditional gas powered lawn mower or a newer battery powered mower? Or should you just pay someone else to mow your yard? Or perhaps, maybe buying a robot lawn mower is the best way to go. To help you choose, this tool estimates the total amount of money and time it takes to mow your lawn – of each of the different methods.

Another question this calculator will help you to answer is: Should I buy a robot lawn mower? Perhaps you need to buy a mower and need some way to determine if this expensive purchase is worth the money. If you buy one, how much time will you save each week? Or perhaps you currently pay a lawn care company. If you buy a robot mower, how long will it take for the mower to pay for itself? How long will it take for you to break even on cost?

A quick analysis of the numbers provided by this tool will tell you the following. Basically, if you pay to have someone mow your lawn now, you really need to buy a robot mower. It will pay for itself in just 2-3 years.

There’s lots of information to consider in this calculator. Like any tool of this sort, several assumptions have been made, and the tool should be used with this in mind. But hopefully it helps you, at least a little. And if you have ideas for improvement, just let us know.

Comparing Mower Types

If you need to buy a new lawn mower, you’ll find that there are basically three different types when you start shopping: gas, electric, and robotic. They all accomplish the same task – to trim your grass and keep your yard looking good. Here’s a few things to consider with each type of mower to help you figure out which is the best fit for your needs.

Gas Mowers

The classic gas powered push mower is extremely common around most neighborhoods. They are fueled by unleaded gasoline and have plenty of power to whip your yard into shape.


Cuts through tough grass easily. Gas mowers have a lot of power, and with the right blades it will cut the thickest of grasses.

No cords or batteries. No need to worry about accidentally mowing over a cord or running out of charge.


Heavy and loud- This makes mowing a lawn difficult for some people.

Needs regular upkeep. – Similar to a car, a gas mower needs regular oil changes and tune ups to keep it going.

Air polluter. Carbon monoxide and dioxide are bad for people.

Electric Mowers

Battery powered electric mowers are another great option for lawn care.


No maintenance. No sparkplugs, fuel filters, or oil! Just charge the battery and go.

Environmentally friendly – No greenhouse gas emissions.

Quiet. A low humming noise is all you’ll hear out of these, and that means no noise cancelling headphones required!


Battery needs to be charged.  Cordless battery mowers need to be charged to have power.

Short battery life. Since mowing uses a lot of energy, it is possible that one charge will not cover your full yard.

Robot Mowers

The price of robotic mowers has come down drastically in the last few years. Robot mowers are basically battery powered push mowers without the push handle. They also are powered by a battery that needs to be charged. When the battery needs to be charged, these units automatically return to their charging base. Then they charge and head back out to resume mowing.


Low maintenance. Like battery powered mowers, robot mowers basically require no maintenance. All that’s required is to change the blades every few months.

Free time! These machines have the power to give you your weekend back. They are autonomous – they choose where they go as they mow your lawn. You can control when they mow, however. They can either be programmed by pushing a few buttons on the unit itself, or by using an app on your smartphone. And since robot mowers are so quiet, some people choose to only have them mow at night. This way they have their yard to enjoy during the day.


Small blade width. It’s small design causes the mowing process to take a long time, and it will mow over most areas twice to get the cut.

Expensive. Robotic mowers tend to be in the price range of $1000 to $2000, which is expensive for a mower.

What’s the verdict?

The gas, electric, and robotic mowers all have their perks and downfalls. Gas mowers are efficient and tough, but also spit out carbon monoxide emissions and lots of noise. Although electric mowers are environmentally friendly and quiet, they are not as powerful. Robot mowers are environmentally friendly and free up your time, but rather pricey. One way to help you choose is to analyze the cost and time it requires to mow your lawn using a gas mower, battery mower, and robot mower. We’ve made it easy for you to do just that using the calculator shown above.