Saved Scenarios and Resolution Comparison
Save useful results in this browser. Compare recent calculations without re-entering values. Stored scenarios remain only on your device.
| Saved | Mode | Summary | Action |
|---|
No scenarios are saved yet.
Formula Reference
| Calculation | Formula |
|---|---|
| Screen DPI | DPI = √(pixel width² + pixel height²) ÷ diagonal inches |
| Horizontal DPI | Horizontal DPI = pixel width ÷ physical width in inches |
| Vertical DPI | Vertical DPI = pixel height ÷ physical height in inches |
| Print size | Print dimension = pixel dimension ÷ target DPI |
| Required pixels | Required pixels = physical dimension in inches × target DPI |
| Pixel pitch | Pixel pitch in millimetres = 25.4 ÷ DPI |
| Mouse eDPI | eDPI = mouse DPI × game sensitivity |
| Equivalent sensitivity | New sensitivity = current DPI × current sensitivity ÷ new DPI |
How to Use
- Choose the calculation mode matching your screen, image, print, or mouse task.
- Enter positive measurements and select the correct physical units.
- Use presets to fill common resolutions or target DPI values.
- Add bleed, margins, viewing distance, or device ratio when relevant.
- Select Calculate and review results, formulas, quality labels, and warnings.
- Copy, export, print, share, or save the completed calculation.
Example Data
| Example | Inputs | Expected result |
|---|---|---|
| 27-inch 4K screen | 3840 × 2160 pixels, 27 inches | About 163.18 PPI |
| Photo print | 6000 × 4000 pixels, 20 × 13.33 inches | About 300 DPI |
| A4-style output | 8.27 × 11.69 inches at 300 DPI | 2481 × 3507 pixels |
| Mouse conversion | 800 DPI, 1.25 sensitivity, new 1600 DPI | 0.625 new sensitivity |
Frequently Asked Questions
What is DPI?
DPI means dots per inch in print workflows. It describes output density across one physical inch. Higher values usually create finer visible printed detail.
What is PPI?
PPI means pixels per inch on digital displays. It measures physical screen pixel density. Screen calculators often use DPI and PPI interchangeably.
Is 300 DPI always required?
No single DPI suits every printing project. Viewing distance and printing method affect requirements. Large posters often need fewer pixels per inch.
Why do horizontal and vertical DPI differ?
Different values indicate mismatched proportions or entered dimensions. Stretching can also create uneven effective density. Confirm dimensions before resizing or sending artwork.
Does changing metadata add image detail?
Changing a DPI metadata value adds no pixels. Image detail depends on actual pixel dimensions. Resampling creates pixels but cannot restore missing detail.
What is pixel pitch?
Pixel pitch is the physical distance between pixels. Smaller pitch means pixels sit closer together. Dense screens generally provide smoother edges and text.
What does device pixel ratio mean?
Device pixel ratio compares physical and logical pixels. Browsers use logical pixels for layout sizing. High-density devices map multiple physical pixels together.
How does bleed affect required pixels?
Bleed extends artwork beyond the final trim. This extension needs additional pixels on every side. Enter the printer's requested bleed before exporting files.
What is eDPI?
eDPI multiplies mouse DPI by game sensitivity. It helps compare settings across different hardware. Game engines may still interpret sensitivity differently.
Can this calculator read uploaded image dimensions?
Yes, supported image files can be inspected. The server reads dimensions during the request. Uploaded files are not intentionally stored by this page.
Why can print quality still vary?
Paper, ink, sharpening, and printer settings matter. Source quality and viewing distance also matter. DPI is one part of final output quality.