Estimate PDF size from page count and content before creation
For scanned documents: Low is a typical 150 to 200 DPI color scan, Medium is a typical 300 DPI color scan, and High is a 600 DPI color scan. For black and white scans, choose Text Only.
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📦 Compress a PDF Free →PDF file size varies dramatically based on content type, quality settings, compression, and scanner DPI. Our calculator provides accurate estimates to help you plan storage requirements, ensure email compatibility, optimize document workflow, and make informed decisions about quality settings before creating your PDFs.
These are typical estimates from this calculator’s own formula, using the page count, content type, and quality shown. Real files vary, but a PDF made the usual way should land close to these sizes.
| Document | Pages | Content Type | Quality | Typical Size |
|---|---|---|---|---|
| 1-page text document | 1 | Text Only | Medium | 0.05 MB |
| Resume | 2 | Text Only | Medium | 0.10 MB |
| Invoice (with a logo) | 1 | Mixed Content | Medium | 0.20 MB |
| Text report | 10 | Text Only | Medium | 0.50 MB |
| Business report with charts | 20 | Mixed Content | Medium | 4.00 MB |
| Image-heavy brochure | 8 | Image-Heavy | Medium | 4.00 MB |
| E-book | 200 | Text Only | Medium | 10.00 MB |
| Scanned page, low quality | 1 | Scanned Documents | Low | 0.25 MB |
| Scanned page, medium quality | 1 | Scanned Documents | Medium | 0.50 MB |
| Scanned page, high quality | 1 | Scanned Documents | High | 1.50 MB |
What makes a PDF bigger: scanned pages and photos add the most size, embedded fonts add a little, and plain text adds very little.
Scan size depends on resolution (DPI) and color mode. See the scan size table on this page, or use the PDF Resolution Calculator, for size by DPI. To estimate the space needed for many files, use the PDF Storage Calculator. To go the other way and see how many pages fit in 1 MB, 2 MB, 10 MB or 1 GB, read How many pages is 1MB PDF?
The type of content in your PDF has the most significant impact on file size. These are the per-page sizes the calculator uses for each content type and quality setting:
| Content Type | Low Quality | Medium Quality | High Quality | Example Documents |
|---|---|---|---|---|
| Text Only | 0.025 MB/page | 0.05 MB/page | 0.1 MB/page | Novels, contracts, manuscripts, plain text documents |
| Mixed Content | 0.1 MB/page | 0.2 MB/page | 0.4 MB/page | Business reports, presentations, brochures with charts |
| Image-Heavy | 0.25 MB/page | 0.5 MB/page | 1 MB/page | Photo albums, product catalogs, marketing materials |
| Scanned Documents | 0.25 MB/page | 0.5 MB/page | 1.5 MB/page | Scanned text documents, receipts, forms, archival scans |
Text-Only Documents: Extremely compact because text compresses very efficiently in PDF format. A 200-page novel creates a PDF of about 10MB at medium quality (5MB at low quality, 20MB at high quality). Page count matters less than you might expect—500 pages of plain text might only produce a 25MB PDF at medium quality.
Mixed Content Documents: Most common business documents fall into this category. A typical 50-page report with moderate use of charts, diagrams, and photos produces a PDF of about 10MB at medium quality. The exact size depends on image quantity, resolution, and compression settings.
Image-Heavy Files: Photo albums, product catalogs, and marketing materials range from 0.25MB per page at low quality to 1MB per page at high quality (0.5MB at medium). A 50-page high-quality product catalog reaches about 50MB. Consider using lower quality settings for web distribution or implementing progressive compression.
Scanned Documents: File size depends mostly on the scanner's resolution (DPI) and color mode. Many scanners default to 300 DPI or more in color, creating larger files than you need. For most text documents, 150 DPI gives readable results at about 40 percent of the file size of a 300 DPI scan, and black and white is about 90 percent smaller than color (see the scan size table below). The calculator uses 0.25 MB per page for scanned documents at low quality (a typical 150 to 200 DPI color scan), 0.5 MB at medium (a typical 300 DPI color scan) and 1.5 MB at high (a 600 DPI color scan). For black and white scans, choose Text Only. For step-by-step fixes, see how to reduce scanned PDF size.
These are typical sizes for one letter-size scanned page saved as a PDF. They come from our own test scans of a letter with text and a small photo (JPEG compression for color and grayscale, CCITT Group 4 compression for black and white) and from the file sizes ScanSnap publishes for its scanners. Real scanners vary with the page, the scanner and its compression setting, so treat these as typical ranges, not exact sizes.
| DPI | Color | Grayscale | Black and white |
|---|---|---|---|
| 150 | 150–300 KB | 150–300 KB | About 20 KB |
| 200 | 200–450 KB | 200–450 KB | About 25 KB |
| 300 | 350–650 KB | 350–600 KB | 30–150 KB |
| 600 | 0.9–1.7 MB | 0.8–1.9 MB | 50–500 KB |
Grayscale saves only about 10 percent compared with color. Black and white is the big saving: for text documents it was about 90 percent smaller than color in our tests (80 to 95 percent, depending on the scanner). Resolution matters too: a 150 DPI scan is about 40 percent of the size of a 300 DPI scan, and a 600 DPI scan is about 5 to 8 times the size of a 150 DPI scan. ScanSnap scans black and white at a higher DPI than color, which is why the top of the black and white range is much larger than our own results. Scan figures last reviewed October 2026.
Low Quality (Web): Applies aggressive compression to images while keeping text sharp. Reduces file size by approximately 50% compared to medium quality. Image quality is noticeably reduced when zoomed, but acceptable for quick drafts, internal reviews, and temporary files. Not recommended for client-facing documents or archival purposes.
Medium Quality (Standard): The ideal balance for most business documents, presentations, and email attachments. Provides good visual quality while maintaining reasonable file sizes. Image compression is moderate—sufficient for screen viewing but may show slight artifacts when printed. This setting is recommended for 90% of use cases including reports, presentations, and general distribution.
High Quality (Print): Minimal compression maintains maximum visual fidelity for professional printing, client presentations, and archival documents. Files are about twice as large as medium quality but preserve fine details, subtle color gradations, and crisp text rendering. Essential for documents that will be professionally printed or require long-term archival at highest quality.
Understanding email platform limits prevents delivery failures and helps you choose appropriate quality settings:
| Email Provider | Attachment Limit | Alternative for Large Files |
|---|---|---|
| Gmail | 25 MB | Google Drive (auto-uploads files >25MB) |
| Outlook | 25 MB | OneDrive sharing link |
| Yahoo Mail | 25 MB | Cloud storage link |
| ProtonMail | 25 MB | ProtonDrive sharing |
| Apple Mail | 20 MB | iCloud Mail Drop (5 GB limit) |
Aim for under 10 MB. Email makes attachments about a third larger while sending them, and the person receiving your email may have a lower limit than you do. Keeping files under 10 MB means they arrive safely almost anywhere. Many corporate email servers impose lower limits (5-10MB) for security reasons.
For step-by-step help getting a file below that size, see How to Compress a PDF Under 10MB for Gmail.
Example 1 - Business Report:
Example 2 - Product Catalog:
Example 3 - Scanned Contracts:
Example 4 - Text Novel:
Use the calculator to plan storage requirements for document archival, backup systems, or content management:
Monthly Document Production Planning: If your organization creates 100 mixed-content reports monthly averaging 30 pages each at medium quality (6MB per report), you need 600MB monthly storage, or 7.2GB annually. Add 30% buffer for growth = about 9.4GB annual storage requirement.
Scanning Project Estimation: Planning to scan 5,000 historical documents averaging 20 pages each? With the calculator’s Scanned Documents setting at medium quality (0.5 MB per page, a typical 300 DPI color scan), each document = about 10 MB and the total project of 100,000 pages = about 49 GB. Using the scan size table above: at 150 DPI in color each document = 3-6 MB (about 15-30 GB in total), and at 300 DPI in black and white each document = 0.6-3 MB (about 3-15 GB in total). Choose appropriate DPI based on preservation requirements vs. storage costs.
Batch Document Creation: Creating 500 product data sheets (10 pages mixed content each) at medium quality = 2MB per sheet = 1,000MB (about 1GB) total. High quality would require about 2GB. Low quality reduces this to 500MB but may impact visual presentation.
Before PDF Creation:
After PDF Creation:
Scanner Optimization:
Over-Scanning: Using 600 DPI when 150 DPI would suffice creates files about 5 to 8 times larger. By the scan size table above, a 50-page color document becomes about 45-85 MB instead of about 8-15 MB.
High-Quality for Web Use: Using high-quality settings for documents that will only be viewed on screens wastes storage and bandwidth. Web viewing requires much less quality than print.
Not Compressing After Creation: Many PDF creation tools do not apply optimal compression. Compressing PDFs after creation shrinks their images: in our tests, PDFs with photos became 90 to 98 percent smaller and scanned PDFs 54 to 92 percent smaller, while text-only PDFs shrank about 20 percent. Results vary by file.
Embedding Full Fonts: Embedding complete font files instead of font subsetting can add 500KB-2MB per font. Subsetting (including only used characters) reduces this to 50-100KB.
Mobile Users: If recipients primarily use mobile devices, keep PDFs under 5MB for reasonable download times on cellular connections. Consider using low-quality settings or providing both high-quality (for desktop) and mobile-optimized versions.
International Distribution: Recipients in areas with slower internet connections benefit from smaller file sizes. A 2MB PDF downloads in 15 seconds on slow connections; a 20MB PDF takes 2.5 minutes.
Cloud Storage: While cloud storage is abundant, syncing large PDF libraries (thousands of files) benefits from file size optimization. A 10,000-document library at 5MB average = 50GB vs. 2MB average = 20GB (60% storage savings).
Text-only PDFs average 50KB per page at standard quality. Mixed content (text+images) runs 200KB per page. Image-heavy PDFs average 500KB per page (1MB at high quality). Scanned documents average about 0.5 MB per page at medium quality, which is a typical 300 DPI color scan; for size by DPI and color mode, see the scan size table on this page. A 50-page mixed document typically creates a 10MB PDF at medium quality, while a 100-page text-only document produces only 5MB.
Content type has the biggest impact on file size. Images, especially high-resolution photos and scanned documents, create the largest files. A single high-resolution photo can be 2-5MB, while an entire page of text is only 50KB. Scanner settings also matter: a 150 DPI color scan is about 150 to 300 KB per page, a 600 DPI color scan about 0.9 to 1.7 MB per page, and a black and white scan far less (see the scan size table on this page). Quality settings matter too, with high quality creating files about four times larger than low quality for most content types.
Use lower quality settings for web-only documents, compress images before embedding (optimize to 150-200 DPI for screen viewing), scan text documents in black and white instead of color (about 90 percent smaller in our tests, while grayscale saves only about 10 percent), reduce DPI for scanned documents (150 DPI is sufficient for most text), remove embedded fonts if universal fonts will work, and compress the PDF after creation (in our tests, PDFs with photos became 90 to 98 percent smaller, scanned PDFs 54 to 92 percent smaller and text-only PDFs about 20 percent smaller; results vary by file).
Most email providers limit attachments to 20-25MB. Gmail allows 25MB, Outlook.com allows 25MB, Yahoo permits 25MB, and ProtonMail accepts 25MB. However, for reliable delivery across all platforms and to avoid slow sending/receiving, keep PDFs under 10MB. Files larger than 25MB should use cloud sharing services like Google Drive, Dropbox, OneDrive, or WeTransfer instead of email attachments.
Scanners often default to 300 DPI or more in color, which creates large image files. A single letter-sized page scanned at 600 DPI produces a 33-megapixel image, about 0.9 to 1.7 MB per page in color (see the scan size table on this page). Each page becomes a full-resolution photo. Scan text documents in black and white, which was about 90 percent smaller than color in our tests, reduce scanner DPI to 150 for text documents (perfectly readable), 200-300 for documents with images, and compress the PDF after scanning: in our tests, a scanned PDF became 54 to 92 percent smaller depending on the level and stayed readable. Results vary by file.
Multiply your average document size by the number of documents to estimate storage needs. For example, if you create 100 reports monthly averaging 5MB each, you need 500MB monthly storage (6GB annually). Build in 20-30% buffer for growth. For mixed document types, calculate each category separately: text documents at 50KB/page, mixed content at 200KB/page, and scans at 0.5 MB/page, then sum the totals.
Text-Only documents contain primarily text with minimal graphics, creating compact files (25-100KB per page, 50KB at medium quality). Mixed Content includes text with embedded charts, photos, or diagrams, averaging 200KB per page at medium quality (100-400KB from low to high) - typical for business reports and presentations. Image-Heavy documents are dominated by photos or graphics, averaging 500KB per page at medium quality (250KB-1MB from low to high) - common in catalogs and portfolios. Scanned Documents are entirely image-based: this calculator uses 0.5 MB per page at medium quality (a typical 300 DPI color scan), 0.25 MB at low (a typical 150 to 200 DPI color scan) and 1.5 MB at high (a 600 DPI color scan), and size by DPI and color mode is shown in the scan size table on this page.
Yes! Calculate one representative document, then multiply by your batch quantity. For example, if one 20-page mixed-content report at medium quality = 4MB, then 50 similar reports = 200MB total. For batches with varying content, calculate each type separately: 30 text documents (20 pages each) = 30MB, 20 mixed documents (30 pages each) = 120MB, giving a combined total of 150MB for planning storage and transfer requirements.
There is no single average, because size depends on the content and the number of pages. Using this calculator's medium-quality estimates, text-only PDFs average 0.05 MB (about 50 KB) per page, mixed content 0.2 MB per page, image-heavy PDFs 0.5 MB per page, and scanned documents 0.5 MB per page (a typical 300 DPI color scan). So a 10-page text report is about 0.5 MB, a 20-page business report with charts is about 4 MB, and a 200-page e-book is about 10 MB.
A 1-page PDF is usually small. Using this calculator's medium-quality estimates, a 1-page text document is about 0.05 MB (about 50 KB), a 1-page document with a logo or chart is about 0.2 MB, an image-heavy page is about 0.5 MB, and a scanned page is about 0.5 MB (0.25 MB at low quality and 1.5 MB at high quality). A black and white scan is much smaller, often under 0.15 MB.
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