To format a science fiction novel for KDP, use a 5.5”×8.5” or 6”×9” trim (depending on length), a clean serif or modern serif font at 11–11.5pt, and minimal chapter ornamentation — sci-fi readers expect clean, readable layouts that let the story take center stage. A typical 90,000-word sci-fi novel produces roughly 315 pages at 5.5×8.5 or 265 pages at 6×9, costing $4.78 or $4.45 respectively to print on KDP. Sci-fi is the third-largest genre on KDP after romance and thriller, with readers who consume 3–6 books per month.
Trim size for sci-fi
| Length | Recommended Trim | Why |
|---|---|---|
| Under 80K words | 5.5” × 8.5” | Standard trade paperback, keeps page count reasonable |
| 80K–120K words | 5.5” × 8.5” or 6” × 9” | Either works; 6×9 reduces pages and cost |
| Over 120K words | 6” × 9” | Keeps the book physically manageable |
Space opera and hard sci-fi tend to run long (100K+). Use 6×9 to keep page count and printing cost under control. A 120K-word space opera at 5.5×8.5 = ~420 pages ($6.04 to print); at 6×9 = ~350 pages ($5.55) — saving $0.49 per copy.
Cyberpunk and near-future tend to be shorter (70K–90K). 5.5×8.5 works perfectly.
Use the KDP Book Calculator to compare page counts and costs at different trims.
Fonts for sci-fi
Sci-fi interiors should feel clean and modern — but still use serif fonts for body text. Sans-serif body text looks like a technical document, not a novel.
Body text
| Font | Feel | Best For |
|---|---|---|
| Garamond | Classic, versatile | Any subgenre |
| Minion Pro | Modern classic | Hard sci-fi, literary sci-fi |
| Palatino | Open, generous | Space opera, longer reads |
| Baskerville | Clean, precise | Near-future, cyberpunk |
Set at 11–11.5pt with 1.35–1.5× line spacing.
Chapter headings
Sci-fi allows more typographic flexibility in headings than most genres:
- Serif headings (larger version of body font) — classic, safe
- Clean sans-serif headings (Futura, Gill Sans, Helvetica) — modern contrast with serif body text
- Monospace elements — for ship logs, computer readouts, or in-universe documents (use sparingly)
Preview options in the Book Fonts tool.
Chapter styling
Sci-fi readers expect clean chapter openings:
- Chapter number + title — “Chapter 12: The Kuiper Anomaly”
- Minimal ornamentation — no floral ornaments or decorative flourishes (those signal romance/fantasy)
- Drop caps: optional. Work well for literary sci-fi; less common in fast-paced space opera
- Scene breaks: three asterisks ( * * * ) or a thin horizontal rule. No ornamental dividers.
In-universe elements
Sci-fi often includes elements that need distinct formatting:
| Element | Formatting Convention |
|---|---|
| Ship logs / computer output | Monospace font, indented or boxed |
| Alien language | Italic, sometimes a distinct font |
| Dates (in-universe calendar) | Small caps or styled chapter subtitles |
| Transmitted messages | Indented, different formatting |
| Epigraphs (in-universe quotes) | Italic, right-aligned, before chapter text |
Keep these consistent throughout the book. Each distinct element type should use the same formatting everywhere.
Cambric includes templates designed for science fiction — clean headings, proper scene breaks, and all KDP specs handled. Import your manuscript, pick a template, export.
Get Cambric — $199
Front and back matter for sci-fi
Front matter
- Half-title page
- Title page
- Copyright page
- Dedication (optional)
- Map / star chart (if applicable — must be 300 DPI minimum)
- Glossary of terms (if short; otherwise in back matter)
Back matter
- Acknowledgments
- About the Author
- Also By [Author]
- Preview chapter of next book — critical for series sell-through
- Glossary / appendix (for hard sci-fi with extensive worldbuilding)
For a complete front/back matter guide, see front matter and back matter explained.
KDP export settings
- Page size: 5.5” × 8.5” or 6” × 9”
- Fonts: embedded
- Color: Grayscale for B&W interior
- Paper: cream for fiction, white if you have grayscale illustrations
- Bleed: disabled unless you have full-page illustrations
- Page count: even
See full KDP specs for your trim or 6×9 KDP specs.
Series formatting for sci-fi on KDP
Sci-fi readers are series buyers. Consistency across volumes matters:
- Same trim size for every book in the series
- Same fonts — body and heading
- Same chapter styling — if Book 1 uses “Chapter X: Title” format, every book should
- Same scene break style
- Consistent spine design for physical shelf appearance
Related guides
- 5.5×8.5 KDP specs — most common sci-fi trim
- 6×9 KDP specs — for longer sci-fi
- Format a fantasy novel — overlapping conventions
- Best fonts for books — font guide
- Book Fonts preview — try fonts
- KDP Book Calculator — page count and cost