A 3.5 inch gap fits 6 of the 19 robot vacuums we checked, 8 if two lower their sensor
3.5 inches is 88.9 mm. With no margin, six fit: eufy Auto-Empty C10 (72 mm), eufy RoboVac 11S MAX (72.4 mm), Dreame L60 Ultra (82 mm), Roborock Qrevo Slim (82 mm), eufy Omni C20 (85 mm) and iRobot Roomba j7+ (86.4 mm). The Dreame X60 Ultra (79.5 mm) and Roborock Saros 10R (79.8 mm) fit only with their sensor lowered. The Dreame X50 Ultra misses by 0.1 mm at 89 mm. After a 10 mm margin for sofa sag, plan for robots under about 79 mm.
| Robot | Height | Navigation | Fits under |
|---|---|---|---|
| eufy Auto-Empty C10 | 72 mm (2.83 in) | Point laser + multi-infrared (no LiDAR tower) | Yes |
| eufy RoboVac 11S MAX | 72.4 mm (2.85 in) | Bump / random (no LiDAR tower) | Yes |
| Dreame X60 Ultra | 79.5 mm lowered, 103 mm raised | VersaLift DToF (retractable laser) | Only with sensor lowered |
| Roborock Saros 10R | 79.8 mm lowered, 93.5 mm raised | StarSight 2.0 | Only with sensor lowered |
| Dreame L60 Ultra | 82 mm (3.23 in) | 3D ToF | Yes |
| Roborock Qrevo Slim | 82 mm (3.23 in) | LiDAR + obstacle sensing | Yes |
| eufy Omni C20 | 85 mm (3.35 in) | Infrared + point laser (no LiDAR tower) | Yes |
| iRobot Roomba j7+ | 86.4 mm (3.40 in) | PrecisionVision camera | Yes |
| Dreame X50 Ultra | 89 mm lowered, 111 mm raised | VersaLift DToF (retractable laser) | No |
| Roborock Qrevo S | 96.5 mm (3.80 in) | LDS laser (LiDAR) | No |
| Dreame L10s Ultra | 97 mm (3.82 in) | AI Action: RGB camera + 3D structured light | No |
| Ecovacs Deebot X8 Pro Omni | 98 mm (3.86 in) | AIVI 3D 3.0 (camera + 3D sensors) | No |
| Ecovacs Deebot X9 Pro Omni | 98 mm (3.86 in) | LiDAR + AIVI 3D 3.0 | No |
| Roborock Q10 S5+ | 99 mm (3.90 in) | PreciSense LiDAR + Reactive Tech | No |
| Roborock Q7 M5+ | 99 mm (3.90 in) | 360° LiDAR | No |
| iRobot Roomba 205 DustCompactor Combo | 101.1 mm (3.98 in) | ClearView LiDAR (inside the body) | No |
| Roborock S8 MaxV Ultra | 103 mm (4.06 in) | LiDAR + Reactive AI 2.0 | No |
| iRobot Roomba 105 Vac + AutoEmpty | 103.9 mm (4.09 in) | ClearView LiDAR | No |
| Roborock Qrevo Curv 2 Flow | 119 mm (4.69 in) | LiDAR + Reactive AI | No |
Heights from each maker's product page, checked 16 Oct 2026. Sources: eufy Auto-Empty C10: maker page, eufy RoboVac 11S MAX: maker page, Dreame X60 Ultra: maker page, Roborock Saros 10R: maker page, Dreame L60 Ultra: maker page, Roborock Qrevo Slim: maker page, eufy Omni C20: maker page, iRobot Roomba j7+: maker page, Dreame X50 Ultra: maker page, Roborock Qrevo S: maker page, Dreame L10s Ultra: maker page, Ecovacs Deebot X8 Pro Omni: maker page, Ecovacs Deebot X9 Pro Omni: maker page, Roborock Q10 S5+: maker page, Roborock Q7 M5+: maker page, iRobot Roomba 205 DustCompactor Combo: maker page, Roborock S8 MaxV Ultra: maker page, iRobot Roomba 105 Vac + AutoEmpty: maker page, Roborock Qrevo Curv 2 Flow: maker page.
How much margin should I leave?
We use 10 mm. Sofas sag in the middle and robots tilt up when they climb rug edges. With that margin, only the two eufy models (72 and 72.4 mm) clear a 3.5 inch gap in our table.
More: Will a robot vacuum fit under my sofa? · Robot vacuum height database