DPI Calculator is most accurate online DPI converter tool to easily convert and calculate dots per inch.
How to calculate DPI?
DPI (dots per inch) is a measure of the resolution of a digital image, representing the number of dots or pixels in one inch of the image.
To calculate DPI (dots per inch) from pixels, you need to know the dimensions (width and height) of the image in pixels and the physical size of the image or display in inches.
Input the width, height in pixels, and screen size in the above fields to calculate the exact dots per inch value.
DPI Calculator & PPI Formulas — Quick Guide
- DPI (print) = dots per inch on paper.
- PPI (screen) = pixels per inch on displays.
- DPI ↔ DPCM: dpcm = DPI ÷ 2.54 | DPI = dpcm × 2.54
- Monitor PPI = √(width² + height²) ÷ diagonal (inches)
What is DPI?
DPI (Dots Per Inch) is a measurement of spatial printing or video dot density, particularly the number of individual dots that can be placed in a line within the span of 1 inch. It is widely used to define the resolution of printers, scanners, and displays.
How to Use the DPI Calculator
- Enter the width of the image or screen in pixels.
- Enter the height in pixels.
- Enter the diagonal size in inches.
- Click Calculate DPI to see the result.
Common DPI Values
| Device | DPI |
|---|---|
| Standard Monitor | 96 DPI |
| Retina Display | 220–326 DPI |
| Printed Magazine | 300 DPI |
| High-End Smartphone | 400–500+ DPI |
DPI vs. PPI — What’s the Difference?
DPI (Dots Per Inch) and PPI (Pixels Per Inch) are often confused, but they refer to different things. DPI is mainly used for printers and indicates how many ink dots a printer can place within an inch. PPI, on the other hand, refers to the resolution of digital displays — the number of pixels in one inch of a screen.
When designing digital content, PPI is more relevant. However, when printing high-quality images, DPI becomes crucial. Understanding the difference helps ensure that your designs look sharp both on screen and on paper.
Why DPI Matters in Design & Printing
For professional printing, using the correct DPI ensures that images are sharp and not pixelated. A minimum of 300 DPI is usually required for magazines and brochures. Lower DPI settings may be acceptable for draft prints or large banners viewed from a distance.
When working with clients, designers often need to confirm DPI requirements before sending files to print. This is where a reliable DPI calculator becomes essential in ensuring technical specifications are met.
Mouse DPI & eDPI
DPI = mouse hardware sensitivity.
eDPI = DPI × in-game sensitivity. Keep the same eDPI for consistent aim across games.
• Valorant: 800 DPI × 0.5 sens = 400 eDPI
• CS2: 400 DPI × 2.0 sens = 800 eDPI
300 DPI Calculator & Screen/Monitor DPI (PPI) Guide
Use this complete DPI calculator guide to check print resolution, screen PPI, and gaming eDPI settings.
Each section below explains a different use case with practical formulas and examples.
A) 300 DPI Calculator — Print Standard
The 300 DPI calculator helps you convert print sizes into exact pixel dimensions for sharp results.
This is essential for magazines, brochures, and professional-quality printing.
- 4 × 6 in → 1200 × 1800 px
- 8 × 10 in → 2400 × 3000 px
- 24 × 36 in → 7200 × 10800 px
For posters or large prints viewed from a distance, 150 DPI may be acceptable.
| Print Size | @300 DPI | @150 DPI |
|---|---|---|
| 4 × 6 in | 1200 × 1800 px | 600 × 900 px |
| 8 × 10 in | 2400 × 3000 px | 1200 × 1500 px |
| 24 × 36 in | 7200 × 10800 px | 3600 × 5400 px |
B) Monitor DPI Calculator (Screen DPI = PPI)
This monitor DPI calculator (or PPI calculator) checks display sharpness. Higher PPI means clearer images and text on screens.
- 1920 × 1080 at 24″ → ≈ 92 PPI
- 2560 × 1440 at 27″ → ≈ 109 PPI
- 3840 × 2160 at 27″ → ≈ 163 PPI
C) How to Calculate DPI from Pixels/Resolution
Learn the formulas to calculate DPI whether for print or screen resolution.
This helps verify output quality before printing or sharing designs.
- DPI (print) = pixels ÷ inches (e.g., 3000 px ÷ 10 in = 300 DPI)
- PPI (screen) = √(width² + height²) ÷ diagonal
- You can calculate DPI of an image if you know its pixel resolution and print size.
D) Gaming DPI & eDPI (Overwatch, CS2, Valorant)
In gaming, DPI measures mouse hardware sensitivity while eDPI combines DPI × in-game sensitivity.
This ensures consistent aiming across FPS games.
| Profile | Mouse DPI | Sensitivity | eDPI |
|---|---|---|---|
| Low-sens | 800 | 0.5 | 400 |
| Mid-sens | 800 | 1.0 | 800 |
| High-sens | 400 | 2.0 | 800 |
When Should You Use the DPI Calculator?
- Before printing high-resolution photos or posters.
- When preparing digital artwork for commercial use.
- To ensure screen resolution matches the design requirements.
- For accurate scaling between devices of different sizes.
DPI Calculator — FAQ
Below are the most common questions about DPI calculators, print resolution, and gaming eDPI.
These quick answers help you understand how to measure, calculate, and use DPI in different scenarios.
How to calculate DPI from pixels?
Divide the pixel resolution (width or height) by the physical size in inches. Example: 3000 px ÷ 10 in = 300 DPI.
How to calculate DPI from resolution?
Use both width and height in pixels and divide by the size in inches. Formula: DPI = pixels ÷ inches.
How to calculate DPI from width and height?
Formula: DPI = √(width² + height²) ÷ diagonal (inches). This works for monitors and displays.
How to calculate mouse DPI?
Mouse DPI = counts per inch the sensor detects. Use an online Mouse DPI Calculator or move your mouse a known distance and measure cursor travel in pixels.
How to calculate DPI?
General rule: DPI = pixels ÷ inches. It’s the number of dots/pixels that fit into one inch.
How to calculate DPI and sensitivity?
For games: eDPI = DPI × in-game sensitivity. Example: 800 DPI × 0.5 sens = 400 eDPI.
How to calculate DPI from dimensions?
Take the image dimensions in pixels and divide by the physical print dimensions in inches. Example: 2400 px ÷ 8 in = 300 DPI.
How to calculate DPI from image size?
If you know the image pixel size (e.g., 3000×2000 px) and print size (10×6.67 in), divide pixels by inches → 300 DPI.
What is a good DPI for printing?
For professional printing, 300 DPI is the industry standard. For posters or draft prints, 150 DPI may be acceptable.
Is DPI the same as PPI?
No. DPI is used for print (dots per inch), while PPI refers to digital screens (pixels per inch).
Learn more about Dots Per Inch (DPI) on Wikipedia.
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