DPI Calculator & Image Resolution Tools
Calculate image DPI, check resolution, convert pixels to inches, estimate print sizes, and calculate gaming mouse sensitivity — free, in your browser.
DPI Calculator
Upload an image or enter dimensions, pick a print size, and see horizontal and vertical DPI plus the maximum size at your target DPI.
Target DPI preset
Effective print DPI
300 DPI horizontal
Keeping the image aspect ratio, the print height would be 6.67 inches. Enter a print height above to check vertical DPI separately.
Excellent for photo-quality printing at close viewing distance.
Poor: below half the target. Good: at least half the target. Excellent: at or above the target. DPI alone does not guarantee print quality.
Reverse calculation — maximum print size at target DPI
At 300 DPI, this image prints up to 10 x 6.67 in.
Pixels required for your chosen print size at 300 DPI: 3000 x px (you have 3000 x 2000 px).
— 3000 px at 10 inches gives exactly 300 DPI.
Popular calculators
- DPI Calculator
Upload an image or enter pixel dimensions and a target print size to calculate the effective print DPI.
- Pixels to Inches
Convert pixels to inches at any DPI, instantly. Enter a pixel value, pick a DPI, and get the physical size in inches.
- PPI Calculator
Enter a screen's pixel resolution and diagonal size in inches to calculate pixels per inch (PPI).
- Print DPI Calculator
Enter pixel dimensions and a print size to find the effective print DPI, or pick a target DPI to find the largest print size.
- eDPI Calculator
Calculate eDPI, reverse-solve for sensitivity or DPI, and compare two setups side by side.
- Sensitivity Converter
Convert a sensitivity setting from one game to another using documented per-game yaw values, keeping the same cm/360 distance.
Browse by category
- Image Tools
Check, resize and convert images, and understand their resolution.
- Pixel Converters
Convert between pixels, inches, centimeters, millimeters and megapixels.
- Print Tools
Work out print sizes, paper pixel requirements and print DPI.
- Gaming Tools
eDPI, sensitivity conversion and cm/360 for popular FPS games.
- Screen & PPI
Pixel density, screen dimensions and display aspect ratios.
Guides
- How to Choose the Right Image Resolution for Printing
Match DPI to viewing distance and print size, and check your image before you print.
- DPI vs PPI: What's the Difference?
PPI describes pixel density on a display; DPI describes dots per inch in printing. They are related, but not the same measurement.
- How Mouse DPI and Sensitivity Work
DPI sets how many counts your mouse reports per inch; sensitivity scales those counts in game. Together they set your turn speed.
- How to Calculate Image DPI
Divide pixel width by print width in inches. Worked examples for photos, posters and screen images.
- How to Calculate PPI
PPI is diagonal pixels divided by diagonal inches. Worked examples for monitors, laptops and phones.
- How to Change Image DPI
Changing DPI metadata changes the suggested print size, not the pixels. Learn what it does and what it cannot do.
- All 12 guides →
Frequently asked questions
What is DPI?
DPI means dots per inch. Effective print DPI is pixel width divided by print width in inches. A 3000-pixel image printed 10 inches wide is 300 DPI.
Is a higher DPI always better?
Not by itself. DPI only matters together with pixel dimensions and print size. A small image printed very large will still look soft, even if it is labelled 300 DPI.
What is the difference between DPI and PPI?
PPI describes pixel density on a display; DPI describes dots per inch in printing. They are related ideas, but not the same measurement.
Does changing DPI metadata add detail?
No. It changes the suggested print size, not the pixels. Detail only comes from having enough pixels in the original image.