# Arduino UNO R4 WiFi (ABX00087): board outline, mounting holes and header rows

> What are the Arduino UNO R4 WiFi board dimensions and mounting-hole positions?

- Category: Electronic components › Microcontroller boards
- Kind: Modern device
- Basis: Arduino UNO R4 WiFi datasheet ABX00087, section 13 'Mounting Holes And Board Outline' (page 19).
- Page: https://xemstudio.com/objects/arduino-uno-r4-wifi/ · JSON: https://xemstudio.com/api/geometry?object=arduino-uno-r4-wifi · Plain text: https://xemstudio.com/objects/arduino-uno-r4-wifi/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 68.58 | 53.34 | 10.1 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Datum for the table: board corner at the USB-C edge and power/analog header edge (x along the long side, y across). Board 68.58 × 53.34 × 1.6.
- Outline: main right edge at 66.04 with a 2.54 tab to 68.58 between y 5.08 and 38.10, joined by 45° chamfers (standard UNO shape).
- Four Ø3.2 holes in the standard UNO pattern (table), the same positions as the UNO R3.
- Header rows 8.5 tall above the board, 2.5 deep, 1.3 in from the long edges: digital row x 17.29 to 65.02, power/analog row x 26.42 to 65.02.
- Not modelled: USB-C (its top edge 11.01 below the digital-header edge, 3 tall), DC barrel jack, Qwiic connector, ICSP header, ESP32-S3 module and LED matrix; leave clearance for them.
- Dimensions are exact nominal (true size), no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| mounting holes | 4 × Ø3.2, UNO pattern | M3 standoffs or screws | designed | all |
| header rows | 2.54 pitch female headers | Arduino shield pins | socket | all |

## Sizes

| hole | x (mm) | y (mm) | Ø (mm) |
|---|---|---|---|
| 1 | 13.97 | 2.54 | 3.2 |
| 2 | 15.24 | 50.80 | 3.2 |
| 3 | 66.04 | 7.62 | 3.2 |
| 4 | 66.04 | 35.56 | 3.2 |

## Where the files are

- Arduino: [UNO R4 WiFi datasheet (ABX00087)](https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf) — web — Publisher's page; dimensions are facts
- Arduino: [UNO R4 WiFi documentation](https://docs.arduino.cc/hardware/uno-r4-wifi/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/arduino-uno-r4-wifi/index.json

- arduino-uno-r4-wifi: [STEP](https://xemstudio.com/files/hardware/arduino-uno-r4-wifi/arduino-uno-r4-wifi.step) · [STL](https://xemstudio.com/files/hardware/arduino-uno-r4-wifi/arduino-uno-r4-wifi.stl) — Arduino UNO R4 WiFi (ABX00087): board outline, mounting holes and header rows

## Questions

**How big is the Arduino UNO R4 WiFi?**

68.58 × 53.34 mm, the same outline as the UNO R3; 10.1 mm tall at the headers.

**Does the UNO R4 WiFi fit UNO R3 cases?**

The outline and the four Ø3.2 mm holes match the UNO R3; the USB-C port replaces USB-B, so the port opening differs.

## Fits with

- [Arduino Uno R3](https://xemstudio.com/objects/arduino-uno-r3/)
- [Arduino Mega 2560 R3](https://xemstudio.com/objects/arduino-mega-2560/)
- [Adafruit Metro (Uno form factor), Metro Mini and Grand Central (Mega form factor)](https://xemstudio.com/objects/adafruit-metro-grand-central/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)