How-To Guide Reading Time Calculator
Estimate the total reading time for a how-to guide, accounting for prose, step comprehension, images, and code blocks.
Fill in the fields above and click Calculate.
Formula
Tprose = Word Count ÷ Reading Speed (wpm)
Tsteps = Number of Steps × 10 s ÷ 60
Timages = Number of Images × 12 s ÷ 60
Tcode = (Code Blocks × Avg Lines per Block × 6 words/line) ÷ 75 wpm
Ttotal = Tprose + Tsteps + Timages + Tcode
Assumptions & References
- Default adult reading speed: 200 wpm for instructional/technical content (Rayner et al., 2016, Psychological Science in the Public Interest).
- Step comprehension overhead: 10 seconds per step to pause, re-read, and mentally process an action step.
- Image viewing time: 12 seconds per image, based on Nielsen Norman Group eye-tracking research on screenshot-heavy guides.
- Code reading speed: 75 wpm equivalent (approximately ⅓ of prose speed), consistent with software engineering reading studies.
- Average code line word equivalent: 6 words per line (tokens + operators).
- Word count should include all body text, step descriptions, captions, and inline code snippets not counted in code blocks.
- Results are estimates; actual reading time varies with reader expertise, guide complexity, and interactivity.