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ACM Paper Formatting Specifications
Complete formatting guide based on ACM conference/journal paper template.
Page Setup
Page Size and Orientation
- Size: US Letter (8.5" × 11") or A4 (210mm × 297mm)
- Orientation: Portrait
Margins
- Top: 1 inch (25.4mm)
- Bottom: 1 inch (25.4mm)
- Left: 0.75 inch (19.05mm)
- Right: 0.75 inch (19.05mm)
Column Layout
- Abstract: Single column
- Body: Two columns
- Column separation: 0.33 inches (8.38mm)
Typography
Font Family
- Primary: Libertine (Linux Libertine)
- Monospace: Inconsolata or Courier
- Fallback: Times New Roman acceptable
Font Sizes and Styles
Title:
- Size: 17pt
- Weight: Bold
- Alignment: Left
- Spacing: 12pt after
Subtitle (if any):
- Size: 14pt
- Weight: Regular
- Alignment: Left
Author Names:
- Size: 12pt
- Weight: Regular
- Alignment: Left
- Format: One author per line or comma-separated
Author Affiliations:
- Size: 10pt
- Weight: Regular
- Alignment: Left
- Format: Institution, City, Country
- Email: 10pt, monospace font
Abstract:
- Single column
- Size: 10pt
- Weight: Regular
- Alignment: Justified
- Heading: "ABSTRACT" in bold, small caps
CCS Concepts:
- Section after abstract
- Format: Bulleted list with concept hierarchy
- Size: 9pt
Keywords:
- After CCS Concepts
- Format: Comma-separated list
- Size: 9pt
Section Headings (Level 1):
- Size: 11pt
- Weight: Bold
- Case: Title Case
- Alignment: Left
- Numbering: 1, 2, 3...
- Spacing: 12pt before, 6pt after
Subsection Headings (Level 2):
- Size: 10pt
- Weight: Bold
- Case: Title Case
- Alignment: Left
- Numbering: 1.1, 1.2, 1.3...
- Spacing: 9pt before, 3pt after
Sub-subsection Headings (Level 3):
- Size: 10pt
- Weight: Italic
- Case: Title Case
- Alignment: Left
- Numbering: 1.1.1, 1.1.2...
- Spacing: 6pt before, 3pt after
Body Text:
- Size: 10pt
- Weight: Regular
- Alignment: Justified
- Line spacing: Single (1.0)
- Paragraph spacing: 6pt after
- First paragraph after heading: No indent
- Subsequent paragraphs: 0.5 inch indent OR no indent with spacing
Figure Captions:
- Size: 9pt
- Weight: Regular
- Format: "Figure X:" in bold, followed by caption
- Alignment: Left (below figure)
- Spacing: 6pt above caption
Table Captions:
- Size: 9pt
- Weight: Regular
- Format: "Table X:" in bold, followed by caption
- Alignment: Left (above table)
- Spacing: 6pt below caption
Footnotes:
- Size: 8pt
- Weight: Regular
- Numbering: Superscript numbers
- Placement: Bottom of column with separator line
References:
- Size: 9pt
- Weight: Regular
- Alignment: Left
- Numbering: [1], [2], [3]...
- Indentation: Hanging indent
- Spacing: 2pt between references
Document Structure
Title and Metadata (Single Column)
- Title
- Subtitle (optional)
- Authors and affiliations
- Abstract
- CCS Concepts
- Keywords
- ACM Reference Format
Body (Two Columns)
- Main content sections
- Acknowledgments
- References
Special Sections
Abstract
Format:
ABSTRACT
Context-aware systems have become increasingly important...
- Heading in bold, small caps
- 150-250 words
- Single paragraph
- No citations
CCS Concepts
Required section listing ACM Computing Classification concepts.
Format:
CCS CONCEPTS
• Human-centered computing → Ubiquitous and mobile computing;
• Software and its engineering → Context specific languages.
- Use official ACM CCS taxonomy
- Organized hierarchically with bullet points
- 3-6 concepts typical
Keywords
Format:
KEYWORDS
context-awareness, ubiquitous computing, adaptation, personalization
- 4-8 keywords
- Comma-separated
- Lowercase (except proper nouns)
ACM Reference Format
Appears at end of first page or after keywords:
Format:
ACM Reference Format:
John Smith and Jane Doe. 2025. Title of Paper. In Proceedings of
Conference Name (CONF '25), Month Day-Day, Year, City, Country.
ACM, New York, NY, USA, XX pages. https://doi.org/10.1145/XXXXXX.XXXXXX
Numbering Conventions
Sections
1 INTRODUCTION
2 RELATED WORK
2.1 Context Modeling
2.2 Adaptation Techniques
3 PROPOSED APPROACH
3.1 Architecture Overview
3.1.1 Context Acquisition Module
Figures and Tables
- Figures: Numbered sequentially (Figure 1, Figure 2...)
- Tables: Numbered sequentially (Table 1, Table 2...)
- Equations: Numbered on right margin (1), (2), (3)...
Special Elements
Equations
- Display equations: Centered on separate line
- Numbering: Right-aligned equation number
- Spacing: 6pt before and after
Example:
E = mc² (1)
Code Listings
- Font: Inconsolata or Courier (monospace)
- Size: 9pt
- Background: Light gray background optional
- Line numbers: Optional, on left margin
- Caption: Same format as figures
Example:
def context_aware_function(context):
if context.location == "office":
return set_work_mode()
return set_personal_mode()
Algorithms
- Use algorithm environment
- Line numbering on left
- Keywords in bold
- Comments in italic
Lists
Bulleted lists:
- Use standard bullet (•)
- Indent 0.25 inches
- Spacing: 3pt between items
Numbered lists:
- Use (1), (2), (3) or 1., 2., 3.
- Indent 0.25 inches
- Spacing: 3pt between items
Description lists:
- Term in bold, followed by description
- Hanging indent for description
Figures and Tables
Figure Guidelines
- Position: Top or bottom of column
- Width: Single-column or double-column (spanning both)
- Quality: Vector graphics preferred (PDF, EPS)
- Resolution: Minimum 300 DPI for raster images
- Color: Full color acceptable for online; consider grayscale printing
- Format: PDF, PNG, JPG, EPS
Figure Captions
Format:
Figure 1: System architecture showing the main components
including context acquisition, reasoning, and adaptation modules.
- "Figure X:" in bold
- Caption text follows
- Place below figure
- Can span multiple lines
- Left-aligned
Table Guidelines
- Border: Minimal lines (top, bottom, below header)
- Header: Bold text
- Alignment: Numbers right-aligned, text left-aligned
- Font: Same as body or one size smaller
- Shading: Light gray for header row optional
Table Captions
Format:
Table 1: Performance comparison across three datasets
- "Table X:" in bold
- Caption text follows
- Place above table
- Left-aligned
Example table:
Table 1: Accuracy Results
Dataset Baseline Proposed
────────────────────────────────
Dataset A 87.3% 94.2%
Dataset B 89.1% 95.7%
Dataset C 85.7% 93.4%
────────────────────────────────
Citations and References
In-Text Citations
ACM uses numbered citations in square brackets:
Examples:
- "Recent work has shown [1]..."
- "Several studies [2, 3, 4] demonstrate..."
- "As Smith et al. [5] noted..."
Reference List Format
Section title: "REFERENCES" (all caps, bold)
Journal article:
[1] Author1 Name, Author2 Name, and Author3 Name. Year.
Title of article. Journal Name Volume, Issue (Month Year),
pages. DOI:10.1145/XXXXXXX
Conference paper:
[2] Author1 Name and Author2 Name. Year. Title of paper.
In Proceedings of Conference Name (CONF 'YY), Month,
City, Country. ACM, New York, NY, USA, pages.
DOI:10.1145/XXXXXXX
Book:
[3] Author Name. Year. Book Title. Publisher, City, Country.
Book chapter:
[4] Author Name. Year. Chapter Title. In Book Title,
Editor Name (Ed.). Publisher, City, Country, pages.
Website/Online:
[5] Author Name. Year. Page Title. Website Name.
Retrieved Month Day, Year from URL
Technical report:
[6] Author Name. Year. Report Title. Technical Report Number.
Institution, City, Country.
Rules:
- Full first and last names (not initials)
- Year after authors
- DOI required when available
- URLs should be hyperlinked
- Alphabetical by first author's last name
- Hanging indent format
Additional Front Matter Elements
Copyright Notice
Appears at bottom of first column on page 1:
Format depends on publication rights:
Permission to make digital or hard copies of all or part of this work...
© 2025 Association for Computing Machinery.
ACM ISBN 978-1-4503-XXXX-X/YY/MM...$15.00
https://doi.org/10.1145/XXXXXX.XXXXXX
(Usually auto-generated by ACM template)
Conference Information
Top of first page:
CONF '25, Month Day-Day, Year, City, Country
© 2025 Copyright held by owner/author(s). Publication rights licensed to ACM.
Acknowledgments
- Separate section before references
- Heading: "ACKNOWLEDGMENTS" (not "ACKNOWLEDGEMENTS")
- No section number
- Thank funding sources, contributors, reviewers
- Brief (1-2 paragraphs)
Example:
ACKNOWLEDGMENTS
This work was supported by NSF Grant No. XXXXXXX. We thank
the anonymous reviewers for their valuable feedback.
Author Information
Multiple Authors
Format options:
Option 1: List format
Author One
Institution
email@domain.com
Author Two
Institution
email@domain.com
Option 2: Inline format
Author One (email@domain.com), Institution;
Author Two (email@domain.com), Institution
Author Footnotes
- Use superscript symbols (*, †, ‡)
- Explain equal contribution, corresponding author, etc.
Special Content Types
Sidebars and Boxes
- Light background color
- Border around content
- Used for examples, definitions, or supplementary material
- Same font size as body
Theorems and Proofs
- Theorem: Bold heading, italic content
- Proof: Italic heading, regular content
- End proof with □ symbol
Definitions
- Format: Bold term followed by definition
- Numbered if multiple definitions
Color and Graphics
Color Usage
- Full color accepted for digital publications
- Consider colorblind-friendly palettes
- Ensure legibility in grayscale for printing
- Use patterns/textures in addition to color
Image Requirements
- Resolution: 300 DPI minimum
- Format: PDF, PNG (for screenshots), JPG
- Vector preferred: For diagrams, charts, graphs
- File size: Keep reasonable (< 5 MB per image)
Two-Column Formatting Rules
Column Breaks
- Columns should be approximately equal height
- Balance columns on final page
- Keep related content together (avoid splitting paragraphs)
Spanning Columns
- Figures and tables can span both columns
- Use when content is too wide for single column
- Place at top or bottom of page
Widows and Orphans
- Avoid single lines at top/bottom of columns
- Keep at least 2 lines of paragraph together
File Preparation
LaTeX
Use ACM Master Article Template:
\documentclass[sigconf]{acmart}
Common document classes:
sigconf: Conference proceedingssigplan: SIGPLAN proceedingsacmsmall: Small journal formatacmlarge: Large journal format
Microsoft Word
- Use official ACM Word template
- Available from ACM website
- Includes styles for all elements
PDF Requirements
- PDF/A compliant preferred
- Fonts embedded: All fonts must be embedded
- Hyperlinks: Active and colored blue
- Bookmarks: Section headings as bookmarks
- Metadata: Include title, authors, keywords
Common Mistakes to Avoid
- Missing required sections: CCS Concepts, Keywords, ACM Reference Format
- Wrong font: Using Times instead of Libertine
- Incorrect citation format: Not following ACM style exactly
- Missing DOIs: References should include DOIs when available
- Copyright notice: Modifying or removing copyright block
- Column imbalance: Large white space in columns
- Figure quality: Low resolution or pixelated images
- Heading capitalization: Using all caps instead of title case
- Author format: Not following ACM author format
- Reference format: Using abbreviated names instead of full names
Checklist for Final Submission
- Correct document class for publication type
- Title and subtitle properly formatted
- All authors and affiliations included
- Abstract 150-250 words
- CCS Concepts section included with appropriate concepts
- Keywords section included (4-8 keywords)
- ACM Reference Format section included
- Two-column layout for body (single column for abstract)
- All section headings numbered and formatted correctly
- All figures have captions below
- All tables have captions above
- All figures and tables referenced in text
- All references follow ACM format
- Full author names in references (not initials)
- DOIs included for all references when available
- Acknowledgments section (if applicable)
- All fonts embedded in PDF
- Copyright notice included (if required)
- PDF hyperlinks working
- File size acceptable (< 25 MB typically)
- Spell-check completed
- Consistent terminology throughout
Template Variations
Conference Proceedings
\documentclass[sigconf]{acmart}- Two-column format
- Copyright block required
- Page limit enforced
Journal Articles
\documentclass[acmsmall]{acmart}oracmlarge- More flexible length
- Different heading styles
- May include received/revised dates
Extended Abstracts
- Shorter format (2-4 pages)
- May omit some sections
- Abbreviated evaluation
ACM-Specific Style Conventions
Terminology
- "Section" not "chapter"
- "Figure" not "Fig." in running text (though "Fig." in captions okay)
- Use em-dash (—) not double hyphen (--)
- Use proper quotation marks (" ") not straight quotes (")
Capitalization
- Section titles: Title Case
- Figure/Table captions: Sentence case after "Figure X:" or "Table X:"
- CCS concepts: Follow official taxonomy capitalization
Spacing
- One space after periods
- No space before punctuation
- Space after commas, colons, semicolons
Additional Resources
- ACM Author Center: https://authors.acm.org/
- ACM Templates: https://www.acm.org/publications/proceedings-template
- ACM CCS Generator: https://dl.acm.org/ccs
- ACM Reference Format Guide: https://www.acm.org/publications/authors/reference-formatting
- LaTeX Template Documentation: https://www.ctan.org/pkg/acmart