Worx Nitro 40V Brushless 21" Cordless Self-Propelled Lawn Mower
Push / Walk-Behind mower · Model WP773 · Residential-duty · Battery
Worx doesn’t publish a list price for this model — it’s dealer quote only. The Worx product page is the place to start.
The Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower is a residential-grade battery walk-behind mower, a quiet, low-maintenance choice for smaller yards, with a 20-inch deck and a 40 V battery. It weighs 63.7 lb (28.9 kg).
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Chosen by stated rules, not opinion: same class, a deck within 2 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.
Engine
| Power Source | battery |
|---|---|
| Fuel Type | Battery / Electric / Cordless |
Electrical
| Voltage | 40 V |
|---|---|
| Battery Capacity | 5 Ah |
Deck
| Cutting Width | 20 in (508 mm) |
|---|---|
| Min Cut Height | 1.5 in (38 mm) |
| Max Cut Height | 4 in (102 mm) |
| Cut Positions | 7 |
Dimensions
| Weight | 64 lbs (28.9 kg) |
|---|
General
| Bagger Capacity | 2 bu (70.5 L) |
|---|---|
| Warranty | 5 yr |
Similar models
Other push / walk-behind mowers with comparable specs — including other brands — that buyers cross-shop with the Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — worx.com.
Other Worx NITRO models › 5 more in this range: NITRO 40V 16 in Push Lawn Mower, NITRO 40V 21 in Self-Propelled Lawn Mower, Nitro 40V Brushless 21 in Cordless Push Lawn Mower, Nitro 40V Brushless 21 in Cordless Self-Propelled Dual-Blade… and more
See all Worx mowers and specs ›
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Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
What the specs work out to
Figures MowerFacts computes from Worx’s own numbers — not published by the manufacturer.
Gate & trailer fit
- 32 in gateFits
- 36 in gateFits
- 48 in gateFits
Needs at least 26 in of clearance (estimated).
Power & run time
- Battery energy200 Wh
Fit uses the deck width plus 6 in for the discharge chute, because Worx doesn't publish an overall width — measure before buying if a gate is tight.
Battery energy is voltage x amp-hours; run time depends on cut height, grass load and blade speed, so it isn't estimated here.
Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower questions
What size deck is on the Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower?
The Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower has a 20-inch (508 mm) cutting deck.
How much does the Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower weigh?
The Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower weighs 64 lb (28.9 kg) as specified by Worx.
How much does the Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower cost?
Worx doesn't publish a list price for the Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the Worx Nitro 40V Brushless 21 in Cordless Self-Propelled Lawn Mower built for?
Residential-duty push / walk-behind mower. Built for home-lawn use.
Source: Worx (manufacturer) · archived copy