# Dreame L40s Ultra vs Dreame L50 Ultra

As of Oct 31, 2026, the Dreame L40s Ultra costs $570 and the Dreame L50 Ultra costs $900, so the Dreame L40s Ultra is $330 cheaper. The Dreame L40s Ultra scores higher in our ranking (8.6 vs 6.4 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the Dreame L50 Ultra for mixed floors with tall thresholds.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40s-ultra-vs-dreame-l50-ultra/

## Side by side

| | Dreame L40s Ultra | Dreame L50 Ultra |
|---|---|---|
| Price | $570 | $900 |
| 3 year cost | $570 | $1,194 |
| Our score | 8.6/10 | 6.4/10 |
| Rank in Floors | #9 | #28 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 3 years per the Dreame US product page (terms may vary by region) |
| Suction | 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above average | 19,500 Pa Vormax (brand claim); Vacuum Wars did not publish airflow for this model |
| Navigation | LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute | LiDAR laser navigation |
| Obstacle avoidance | 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7 of 24 objects | RGB camera plus 3D structured light with LED lights, 180+ object types (brand claim); Vacuum Wars scored 20 of 24 objects avoided |
| Mopping | Dual spinning mops, 10.5 mm lift, extend and auto removal (Dreame); Vacuum Wars measured 0.95 g water left and a 259 combined mop score | Yes, dual spinning pads with one extending pad, 10.5 mm lift on carpet and automatic pad removal |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, into a 3.2 L disposable bag that Dreame says lasts up to 100 days |
| Dock features | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) | Washes pads with water up to 167°F (4 settings), hot air drying, auto refill, auto detergent dosing, self cleaning washboard with 20 nozzles |
| Runtime | Up to 220 min in quiet mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,935 sq ft per charge | 6,400 mAh battery; up to 200 min in quiet mode (brand claim) |
| Dustbin | 310 ml robot bin plus 3.2 L dock bag (Dreame) | 395 mL onboard bin per Dreame (Vacuum Wars lists 400 mL) |
| Height | 3.82 in (Dreame) | 97 mm (3.8 in) robot height per Dreame |
| Pet hair | HyperStream Detangling DuoBrush (Dreame); Vacuum Wars measured 91% pet hair pickup, 92% carpet sand removal and 0% hair wrap | HyperStream detangling DuoBrush; Vacuum Wars measured 100% flattened pet hair pickup |
| App | Dreamehome app with third party voice assistants only (Dreame); Vacuum Chef notes no built in voice assistant or live video | Dreamehome app; works with Alexa, Siri and Google Home, Matter promised in a future update |
| Threshold | 1.57 in double layer and 0.87 in single steps (Dreame) | 1.65 in single step and 2.36 in double step (brand claim); Vacuum Wars measured 42 mm single, tied for the highest it tested |
| Noise | Vacuum Chef measured 78 dB at max suction | n/a |
| Best for | pet owners with carpet on a budget | mixed floors with tall thresholds |
| Skip if | your floor often has cables, socks or toys | you have a large home and want one charge to cover it |

## What reviewers found

### Dreame L40s Ultra

- Vacuum Wars (3.51 Vacuum Wars stars): 92% carpet sand removal, 91% pet hair pickup and 0% hair wrap with the DuoBrush, about 1,935 sq ft per charge, but only 7 of 24 obstacles avoided. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- Vacuum Chef (95/100): Scored 95/100 in its real world cleaning tests, measured 490 FPM carpet airflow and 78 dB at max suction. Obstacle avoidance varied by floor and object. [Source](https://vacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-tested/?amp=1)

### Dreame L50 Ultra

- Vacuum Wars (3.84/5): Measured 90% carpet sand removal, 100% pet hair pickup, 20 of 24 obstacles avoided, a 211 point mopping score versus a 188 average with 0.35 g of water left, and a 42 mm threshold climb; coverage was below average at about 823 sq ft per charge. [Source](https://vacuumwars.com/dreame-l50-ultra-robot-vacuum-review)
- Vacuum Wars (3 month test): After three months of daily use with kids and a heavy shedding dog, mapping and obstacle avoidance held up, but hair formed clumps, the dock and bin clogged about once a week, and the app did not warn of clogs. [Source](https://vacuumwars.com/dreame-l50-ultra-review-3-months)
- RTINGS: In RTINGS' comparison with the L40 Ultra, the L50 Ultra handled pet hair better and had stronger obstacle avoidance and threshold clearance, while the L40 Ultra cleaned hard floors and carpet better. We could not read RTINGS' numeric scores. [Source](https://www.rtings.com/robot-vacuum/tools/compare/dreame-l40-ultra-dreame-l50-ultra/74370/103657)

## Questions buyers ask

### Which is better, the Dreame L40s Ultra or the Dreame L50 Ultra?

The Dreame L40s Ultra scores higher in our ranking (8.6 vs 6.4 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the Dreame L50 Ultra for mixed floors with tall thresholds.

### Which is cheaper?

The Dreame L40s Ultra at $570, versus $900 for the Dreame L50 Ultra, checked Oct 31, 2026. Over 3 years with running costs: $570 vs $1,194.

### What is the difference between the L40s Ultra and the L50 Ultra?

Suction: 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above… on the L40s Ultra, 19,500 Pa Vormax (brand claim); Vacuum Wars did not publish airflow for this model on the L50 Ultra. Navigation: LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute on the L40s Ultra, LiDAR laser navigation on the L50 Ultra. Obstacle avoidance: 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7… on the L40s Ultra, RGB camera plus 3D structured light with LED lights, 180+ object types (brand claim)… on the L50 Ultra.

Full reviews: [Dreame L40s Ultra](https://robotsforthat.com/robot/dreame-l40s-ultra/index.md), [Dreame L50 Ultra](https://robotsforthat.com/robot/dreame-l50-ultra/index.md)