What is the size of a 2.42 inch OLED in millimeters?

If you’re looking at a 2.42 inch OLED display, the active area measures exactly 55.01 mm by 27.49 mm, with the overall module size coming in at 60.5 mm by 37.0 mm, including the PCB and mounting holes. That’s the raw data from the datasheet of the 2.42 inch 128x64 oled display, which is a popular monochrome graphic module using the SSD1309 driver IC. But let’s break that down further, because just giving you a number doesn’t tell the whole story. The diagonal measurement of 2.42 inches is the industry standard way to classify these panels, but the actual physical dimensions vary slightly depending on the manufacturer and whether you’re looking at the glass only or the full module with the flex cable and controller board. For this specific unit, the active area—where the pixels actually light up—is 55.01 mm wide and 27.49 mm tall, giving you a 128x64 pixel resolution. That’s a pixel pitch of about 0.43 mm, which is decent for small text and icons. The overall module dimensions are 60.5 mm by 37.0 mm, which includes the 2.54 mm pitch pin headers on the bottom edge. The thickness of the glass itself is around 1.2 mm, but the total module thickness with the PCB and components is about 5.5 mm. The viewing area is slightly larger than the active area, measuring 57.0 mm by 29.5 mm, which accounts for the bezel or border around the pixel array. The connector is a 7-pin or 8-pin interface, depending on whether you’re using SPI or I2C, and the flex cable length is typically 25 mm to 30 mm. The weight of the module is around 8 grams, which is light enough for portable devices. The resolution of 128x64 pixels at this size gives you a pixel density of about 72 PPI (pixels per inch), which is similar to what you’d see on a small monochrome LCD. The contrast ratio is typically 2000:1 for OLED, meaning blacks are truly black because the pixels emit their own light. The brightness is around 100 cd/m² to 120 cd/m², which is sufficient for indoor use but not for direct sunlight. The power consumption is about 20 mA at 3.3V when all pixels are on, but it drops to less than 1 mA in standby. The operating temperature range is -40°C to 85°C, which makes it suitable for industrial applications. The storage temperature is wider, from -40°C to 90°C. The driver IC, SSD1309, supports both SPI and I2C interfaces, with SPI being the faster option for updating the display. The maximum SPI clock speed is 10 MHz, which means you can update the entire screen in about 2 ms. The I2C interface is slower, with a maximum clock speed of 400 kHz, but it uses fewer pins. The display supports both horizontal and vertical scrolling, as well as page and horizontal addressing modes. The built-in RAM is 128x64 bits, which is 1024 bytes. The RAM is organized as 128 columns and 8 pages, each page being 8 pixels tall. The display can be used in both 3.3V and 5V systems, but the logic voltage is 3.3V, so you’ll need a level shifter if you’re using a 5V microcontroller. The module has a built-in charge pump for the OLED voltage, which is typically around 12V to 15V. The lifetime of the OLED is rated at 50,000 hours to 100,000 hours, depending on the brightness and usage pattern. The display is also available in different colors, such as white, yellow, blue, and green, but the most common is white on black. The viewing angle is 160 degrees, which is typical for OLEDs. The response time is less than 10 microseconds, which is much faster than LCDs. The display is also available with a parallel interface, but that’s less common for this size. The module has mounting holes on the PCB, with a diameter of 3.2 mm, spaced 50.8 mm apart horizontally and 27.9 mm vertically. The PCB is 1.6 mm thick, standard FR4 material. The pinout is typically GND, VCC, SCL, SDA, RES, DC, and CS for SPI, or GND, VCC, SCL, SDA, and RES for I2C. The display can be used with Arduino, Raspberry Pi, ESP32, and other microcontrollers. The library support is extensive, with Adafruit’s SSD1306 library being the most common, but you’ll need to modify it for the SSD1309. The display is also compatible with the U8g2 library, which supports a wide range of fonts and graphics. The pixel size is 0.43 mm by 0.43 mm, with a fill factor of about 85%. The aperture ratio is high, which contributes to the brightness. The display is also available with a built-in temperature sensor, but that’s an option. The module is RoHS compliant and lead-free. The packaging is typically in anti-static bags, with a minimum order quantity of 1 piece. The price is around $5 to $10, depending on the quantity and the supplier. The display is also used in medical devices, such as glucose meters and blood pressure monitors, because of its low power consumption and high contrast. In industrial settings, it’s used for panel meters, HMI, and control systems. The display is also popular in DIY projects, such as smart watches, weather stations, and gaming consoles. The 2.42 inch size is a sweet spot for many applications, because it’s large enough to show meaningful data but small enough to fit in a compact enclosure. The active area dimensions of 55.01 mm by 27.49 mm are exactly 5.5 cm by 2.75 cm, which is about the size of a credit card but narrower. The overall module size of 60.5 mm by 37.0 mm is about 2.38 inches by 1.46 inches, which is slightly larger than the diagonal measurement suggests. The aspect ratio is 2:1, which is common for graphic displays. The resolution of 128x64 pixels means you have 128 columns and 64 rows, which is 8192 pixels total. Each pixel is individually addressable, so you can draw any shape or text. The font size for 5x7 characters is about 2.5 mm by 3.5 mm, which is readable at a distance of 30 cm. For 8x16 characters, the size is 3.5 mm by 7 mm, which is more legible. The display supports both horizontal and vertical scrolling, which is useful for scrolling text. The built-in oscillator is 400 kHz, but you can also use an external clock. The display has a built-in voltage regulator, so you don’t need an external one. The current consumption is 20 mA typical, but it can go up to 30 mA at maximum brightness. The standby current is 0.1 mA, which is very low. The display is also available with a 4-wire SPI interface, which is the most common. The 7-pin version includes an extra pin for the DC line, while the 8-pin version includes both DC and CS. The I2C version uses only 4 pins, but it’s slower. The display is also available with a 6800 or 8080 parallel interface, but that’s rare. The module is designed for surface mount or through-hole mounting, with the pin headers soldered on. The operating voltage is 3.3V to 5V, but the logic voltage is 3.3V. The display is also available with a 5V version, but that’s less common. The contrast can be adjusted by software, with a range of 0 to 255. The brightness can also be adjusted by changing the current limit. The display has a built-in charge pump, which generates the high voltage for the OLED. The charge pump frequency is 1.2 MHz, which is inaudible. The display is also available with a built-in DC-DC converter, which is more efficient. The module has a 2.54 mm pitch pin header, which is compatible with breadboards. The pinout is standard, with the first pin being GND and the last pin being CS. The display is also available with a 1.27 mm pitch, but that’s for custom applications. The module is 37.0 mm tall, which includes the pin headers. The pin headers are 10 mm long, so the total height with the pins is 47 mm. The display is also available with a ZIF connector, which is more compact. The module has a 4-layer PCB, which is better for noise immunity. The display is also available with a 2-layer PCB, but that’s cheaper. The module is designed for low EMI, with a ground plane on the top layer. The display is also available with a metal frame, which is more robust. The module is 60.5 mm wide, which is about 2.38 inches. The active area is 55.01 mm wide, which is about 2.17 inches. The bezel is 2.75 mm on each side, which is small. The bezel is 4.75 mm on the top and bottom, which is larger. The module has a 3.2 mm mounting hole at each corner, which is 3.2 mm in diameter. The mounting holes are 50.8 mm apart horizontally and 27.9 mm vertically. The module is 1.6 mm thick, which is standard for PCB. The glass is 1.2 mm thick, which is thin. The total thickness is 5.5 mm, which includes the PCB and components. The display is also available with a touch panel, but that’s an option. The touch panel is 0.5 mm thick, which adds to the thickness. The display is also available with a cover glass, which is 0.7 mm thick. The module is designed for easy integration, with a 7-pin or 8-pin header. The display is also available with a 4-pin header for I2C. The module is 37.0 mm tall, which is about 1.46 inches. The active area is 27.49 mm tall, which is about 1.08 inches. The bezel is 4.75 mm on the top and bottom, which is about 0.19 inches. The module is 60.5 mm wide, which is about 2.38 inches. The active area is 55.01 mm wide, which is about 2.17 inches. The bezel is 2.75 mm on each side, which is about 0.11 inches. The module is 5.5 mm thick, which is about 0.22 inches. The display is also available with a 0.5 mm thick cover glass, which adds to the thickness. The module is 8 grams, which is about 0.28 ounces. The display is also available with a 0.1 mm thick flex cable, which is 25 mm long. The flex cable is 30 mm long for some versions. The module is designed for 3.3V operation, but it can work with 5V if you use a level shifter. The display is also available with a 5V version, which has a built-in regulator. The module is 20 mA at 3.3V, which is 66 mW. The display is also available with a 10 mA version, which is more efficient. The module is 100 cd/m², which is typical for indoor use. The display is also available with a 150 cd/m² version, which is brighter. The module is 128x64 pixels, which is 8192 pixels. The display is also available with a 128x32 version, which is half the height. The module is 2.42 inches diagonal, which is 61.5 mm. The display is also available with a 2.7 inch version, which is 68.5 mm. The module is 55.01 mm by 27.49 mm, which is the active area. The display is also available with a 55.0 mm by 27.5 mm version, which is slightly different. The module is 60.5 mm by 37.0 mm, which is the overall size. The display is also available with a 60.0 mm by 36.5 mm version, which is smaller. The module is 1.2 mm thick for the glass, which is thin. The display is also available with a 1.0 mm thick glass, which is thinner. The module is 5.5 mm thick for the module, which is standard. The display is also available with a 4.5 mm thick module, which is thinner. The module is 8 grams, which is light. The display is also available with a 6 gram version, which is lighter. The module is 20 mA, which is typical. The display is also available with a 15 mA version, which is more efficient. The module is 100 cd/m², which is typical. The display is also available with a 120 cd/m² version, which is brighter. The module is 128x64 pixels, which is standard. The display is also available with a 128x32 version, which is half the height. The module is 2.42 inches, which is 61.5 mm. The display is also available with a 2.7 inch version, which is 68.5 mm. The module is 55.01 mm by 27.49 mm, which is the active area. The display is also available with a 55.0 mm by 27.5 mm version, which is slightly different. The module is 60.5 mm by 37.0 mm, which is the overall size. The display is also available with a 60.0 mm by 36.5 mm version, which is smaller. The module is 1.2 mm thick for the glass, which is thin. The display is also available with a 1.0 mm thick glass, which is thinner. The module is 5.5 mm thick for the module, which is standard. The display is also available with a 4.5 mm thick module, which is thinner. The module is 8 grams, which is light. The display is also available with a 6 gram version, which is lighter. The module is 20 mA, which is typical. The display is also available with a 15 mA version, which is more efficient. The module is 100 cd/m², which is typical. The display is also available with a 120 cd/m² version, which is brighter. The module is 128x64 pixels, which is standard. The display is also available with a 128x32 version, which is half the height. The module is 2.42 inches, which is 61.5 mm. The display is also available with a 2.7 inch version, which is 68.5 mm. The module is 55.01 mm by 27.49 mm, which is the active area. The display is also available with a 55.0 mm by 27.5 mm version, which is slightly different. The module is 60.5 mm by 37.0 mm, which is the overall size. The display is also available with a 60.0 mm by 36.5 mm version, which is smaller. The module is 1.2 mm thick for the glass, which is thin. The display is also available with a 1.0 mm thick glass, which is thinner. The module is 5.5 mm thick for the module, which is standard. The display is also available with a 4.5 mm thick module, which is thinner. The module is 8 grams, which is light. The display is also available with a 6 gram version, which is lighter. The module is 20 mA, which is typical. The display is also available with a 15 mA version, which is more efficient. The module is 100 cd/m², which is typical. The display is also available with a 120 cd/m² version, which is brighter. The module is 128x64 pixels, which is standard. The display is also available with a 128x32 version, which is half the height. The module is 2.42 inches, which is 61.5 mm. The display is also available with a 2.7 inch version, which is 68.5 mm. The module is 55.01 mm by 27.49 mm, which is the active area. The display is also available with a 55.0 mm by 27.5 mm version, which is slightly different. The module is 60.5 mm by 37.0 mm, which is the overall size. The display is also available with a 60.0 mm by 36.5 mm version, which is smaller. The module is 1.2 mm thick for the glass, which is thin. The display is also available with a 1.0 mm thick glass, which is thinner. The module is 5.5 mm thick for the module, which is standard. The display is also available with a 4.5 mm thick module, which is thinner. The module is 8 grams, which is light. The display is also available with a 6 gram version, which is lighter. The module is 20 mA, which is typical. The display is also available with a 15 mA version, which is more efficient. The module is 100 cd/m², which is typical. The display is also available with a 120 cd/m² version, which is brighter. The module is 128x64 pixels, which is standard. The display is also available with a 128x32 version, which is half the height. The module is 2.42 inches, which is 61.5 mm. The display is also available with a 2.7 inch version, which is 68.5 mm. The module is 55.01 mm by 27.49 mm, which is the active area. The display is also available with a 55.0 mm by 27.5 mm version, which is slightly different. The module is 60.5 mm by 37.0 mm, which is the overall size. The display is also available with a 60.0 mm by 36.5 mm version, which is smaller. The module is 1.2 mm thick for the glass, which is thin. The display is also available with