# Photo Resolution Guide: Pixels, DPI, Print Sizes
Photo resolution is the amount of pixel detail in an image. Pixel dimensions determine how much detail the file contains. DPI or PPI metadata does not add detail by itself. Cropping removes pixels, compression can reduce quality, and export size should match the final use.
If a client asks, "Is this high resolution?", the practical answer is: check the pixel dimensions, the intended print or screen size, and whether the file has been cropped or compressed too heavily.
Resolution Terms in Plain English
| Term | What it means | What to remember |
|---|---|---|
| Pixels | Tiny squares of image detail | More pixels usually allow larger output |
| Pixel dimensions | Width and height in pixels, such as 6000 x 4000 | This is the most useful resolution number |
| Megapixels | Total pixels divided by one million | Useful for rough camera comparisons |
| DPI | Dots per inch, often used for printing | DPI metadata alone does not create more detail |
| PPI | Pixels per inch, often used for image sizing | PPI matters when mapping pixels to print size |
| Compression | File size reduction | Too much compression can create visible artifacts |
Pixel Dimensions Matter Most
A file that is 6000 x 4000 pixels contains more usable detail than a file that is 1200 x 800 pixels. Changing a small file from 72 DPI to 300 DPI does not magically add real detail. It only changes how software may interpret print size.
To estimate print size, divide pixels by the desired pixels per inch.
| File size | Approximate print at 300 PPI | Approximate print at 200 PPI |
|---|---|---|
| 6000 x 4000 px | 20 x 13.3 in | 30 x 20 in |
| 4000 x 3000 px | 13.3 x 10 in | 20 x 15 in |
| 3000 x 2000 px | 10 x 6.7 in | 15 x 10 in |
| 1800 x 1200 px | 6 x 4 in | 9 x 6 in |
These are practical estimates, not a guarantee for every printer, paper, viewing distance, or image. A sharp, clean file can often print better than a larger file that is blurry or heavily compressed.
DPI and PPI Do Not Add Detail
Many clients and photographers get stuck on DPI because some software shows a number like 72, 240, or 300. The important question is whether the file has enough pixels for the intended output.
For example, a 6000 x 4000 pixel image marked as 72 DPI still has 6000 x 4000 pixels. A 1200 x 800 pixel image marked as 300 DPI still has only 1200 x 800 pixels.
When preparing files for clients, include clear guidance rather than only a DPI number. Tell them whether the files are full-resolution, web-sized, or intended for small sharing only.
Cropping Reduces Resolution
Cropping cuts pixels away. A tight crop can improve composition, but it also reduces maximum print size and detail.
Common crop risks:
- Cropping a full-body portrait into a tight headshot.
- Cropping a horizontal image into a vertical social format.
- Straightening a tilted image and losing edge pixels.
- Heavy crop after shooting too far from the subject.
- Client cropping a downloaded file again for a profile or print.
Shoot with enough space for the final use when you can. If the client needs banners, thumbnails, vertical social images, and prints, deliver suitable versions or explain which files should be used for each purpose.
Compression and File Format
Resolution and file size are related, but they are not the same thing. A highly compressed JPEG can have large pixel dimensions but still show blocky edges, banding, or smeared detail.
Use JPEG for most client galleries and general delivery when the export is high quality. Use PNG when you need transparency or certain graphic files. Keep original RAW files and working files in your archive, but do not assume clients need those unless that was part of the agreement.
Before delivery, open exported files and check:
- Faces and eyes.
- Fine texture such as hair, fabric, text, or product detail.
- Smooth skies or studio backgrounds.
- Edges around high-contrast areas.
- Color shifts after export.
Resolution for Web, Social, and Client Downloads
Different uses need different files.
| Use | Practical delivery note |
|---|---|
| Website portfolio | Export large enough for sharp display but not unnecessarily huge |
| Social sharing | Use versions sized for easy upload and viewing |
| Client preview | Web-sized files can make browsing faster |
| Print delivery | Use high-resolution files with enough pixels for the print size |
| Archive | Keep original files and final high-quality exports organized |
Avoid sending only tiny web files if the client expects prints. Avoid sending only huge files if the client only needs quick online review.
For client sharing options, read how to share photos with clients.
Original vs Scaled Delivery
Photographers often need more than one export type:
- Full-resolution files for printing, design work, or archive use.
- Web-sized files for quick sharing and faster browsing.
- Watermarked previews for proofing or review.
- Collection-based downloads for events, teams, families, or product sets.
SendPhoto can support one-image, selected-collection, and full-gallery ZIP downloads through download controls. That helps when a client needs only the ceremony, only the product details, or the complete final set. See download control and gallery delivery for delivery context.
How to Explain Resolution to Clients
Use plain language:
"These full-resolution files are suitable for printing and archiving. The web-sized files are better for quick sharing online. If you plan to print a large wall piece, use the full-resolution version and avoid cropping it heavily."
For a gallery with multiple collections, name folders clearly:
- Full resolution.
- Web sharing.
- Ceremony.
- Portraits.
- Product details.
- Social previews.
Clear names prevent clients from uploading a small preview file when they need a print file.
Shooting for Better Resolution
Resolution starts before export.
To protect detail:
- Focus accurately.
- Use a shutter speed fast enough to avoid blur.
- Avoid unnecessary cropping by composing carefully.
- Keep ISO reasonable when possible.
- Clean the lens.
- Use enough light for the subject.
- Review important images at full size.
For settings basics, read camera settings for beginners. For images intended for online posting, social media photography tips can help with composition and delivery choices.
Photo Resolution Checklist
- Check pixel dimensions first.
- Do not rely on DPI metadata alone.
- Remember that cropping removes pixels.
- Export files for their real use.
- Watch for compression artifacts.
- Keep original files separate from exported files.
- Explain full-resolution versus web-sized files to clients.
- Use clear gallery collections and download options.
Good resolution is not just a number. It is the combination of sharp capture, enough pixels, careful cropping, clean export, and clear delivery.