PowerToolGrid

Greenworks 40V vs Milwaukee M18

Greenworks 40V and Milwaukee M18 batteries don't swap: we have no source saying either pack runs the other's tools. Greenworks 40V: 5 battery packs (2–8 Ah) and 47 garden tools listed. Milwaukee M18: 13 battery packs (2–12 Ah) and 29 garden tools listed. Widest mower: 25 in against 21 in. Strongest blower: 730 CFM against 650 CFM. Widest string trimmer: 17 in against 17 in.

At a glance

Fact Greenworks 40V Milwaukee M18
Voltage on the label40 V18 V
Batteries5 packs, 2–8 Ah13 packs, 2–12 Ah
Garden tools listed47: 10 lawn mowers, 6 string trimmers, 10 leaf blowers, 3 hedge trimmers, 7 chainsaws, 2 pole saws, 8 snow blowers, 1 tool29: 1 mower, 6 string trimmers, 6 leaf blowers, 7 hedge trimmers, 4 chainsaws, 2 pole saws, 1 power head, 2 other yard tools
Widest mower25 in25 in Dual Blade Brushless Self-Propelled Mower21 inM18 FUEL 21 in Self-Propelled Dual Battery Mower
Strongest blower730 CFM730 CFM Blower650 CFMM18 FUEL Dual Battery Backpack Blower
Widest string trimmer17 in40V 17 in Brushless String Trimmer (Tool Only)17 inM18 FUEL 17 in Dual Battery String Trimmer
Self-propelled mowers2 of 101 of 1
Longest tool warranty3 years3 years
Where it's soldSeveral storesSeveral stores

Counts are what this catalogue lists so far, not each brand's whole range.

Do the batteries swap?

No. We have no source saying a Greenworks 40V pack runs Milwaukee M18 tools, or the other way round. Owning both means two sets of batteries and chargers, so choosing between them is choosing which tools you'll keep buying.

Which batteries work with Greenworks 40V · Which batteries work with Milwaukee M18

Tool by tool

Each platform's products of a kind, biggest first by the spec that matters most for it. A dash means the brand publishes no figure we have read yet.

Batteries 5 vs 13

Greenworks 40V

Milwaukee M18

All batteries from both brands, spec by spec →

Lawn mowers 10 vs 1

Greenworks 40V

Milwaukee M18

All lawn mowers from both brands, spec by spec →

String trimmers 6 vs 6

Greenworks 40V

Milwaukee M18

All string trimmers from both brands, spec by spec →

Leaf blowers 10 vs 6

Greenworks 40V

Milwaukee M18

All leaf blowers from both brands, spec by spec →

Hedge trimmers 3 vs 7

Greenworks 40V

Milwaukee M18

All hedge trimmers from both brands, spec by spec →

Chainsaws 7 vs 4

Greenworks 40V

Milwaukee M18

All chainsaws from both brands, spec by spec →

Pole saws 2 vs 2

Greenworks 40V

Milwaukee M18

All pole saws from both brands, spec by spec →

Other yard tools 1 vs 2

Greenworks 40V

Milwaukee M18

All other yard tools from both brands, spec by spec →

Only one of them is listed with

  • Greenworks 40V only: snow blowers.
  • Milwaukee M18 only: power heads & attachments.

Not listed here doesn't mean the brand doesn't make one; the catalogue is still growing.

Questions

Do Greenworks 40V batteries work with Milwaukee M18 tools?

No. We have no source saying a Greenworks 40V battery runs Milwaukee M18 tools, or the other way round, so owning both means two sets of packs and chargers.

Which has more garden tools, Greenworks 40V or Milwaukee M18?

In this catalogue so far: 47 for Greenworks 40V and 29 for Milwaukee M18. Both brands may make more than are listed yet.

Which has the bigger battery, Greenworks 40V or Milwaukee M18?

By the brands' amp-hour figures, the largest Greenworks 40V pack listed is 8 Ah and the largest Milwaukee M18 pack is 12 Ah. Amp-hours only compare fairly at the same voltage (40 V against 18 V); watt-hours, where the brand states them, are on each battery's page.

Which makes the wider mower, Greenworks 40V or Milwaukee M18?

By the brands' own figures: 25 in for Greenworks 40V (25 in Dual Blade Brushless Self-Propelled Mower) and 21 in for Milwaukee M18 (M18 FUEL 21 in Self-Propelled Dual Battery Mower).

Which has the stronger leaf blower, Greenworks 40V or Milwaukee M18?

By the brands' own figures: 730 CFM for Greenworks 40V (730 CFM Blower) and 650 CFM for Milwaukee M18 (M18 FUEL Dual Battery Backpack Blower).

Which has the wider string trimmer, Greenworks 40V or Milwaukee M18?

By the brands' own figures: 17 in for Greenworks 40V (40V 17 in Brushless String Trimmer (Tool Only)) and 17 in for Milwaukee M18 (M18 FUEL 17 in Dual Battery String Trimmer).

Which has the longer warranty, Greenworks 40V or Milwaukee M18?

The longest tool warranty we have read is 3 years for Greenworks 40V and 3 years for Milwaukee M18. Batteries often carry a shorter one; check each product's page.

Answered from the catalogue data, as of October 23, 2026. How we compare.

More comparisons