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Free keyword density calculator & SEO keyword analyzer. Calculate keyword density, frequency percentage & optimize content for search engines. Our calculator uses the keyword density formula to analyze keyword frequency, identify over-optimization, and provide recommendations for natural, SEO-friendly content that ranks well.
Last updated: February 2, 2026
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Main keyword to analyze (e.g., "SEO optimization")
Paste your article, blog post, or web page content
Formula
(Count ÷ Total Words) × 100%
Measure keyword frequency as percentage of content
Metric
Occurrence Count
Count exact and partial keyword matches
Alert Threshold
>3% Density
Warn against excessive keyword usage
Analysis
Multi-word Phrases
Find most common phrases and keyword combinations
Target
1.0-2.5% Range
Optimize content for search engines and readers
Metrics
Comprehensive Stats
Detailed content statistics for SEO analysis
For 1,000-word article with target keyword appearing 15 times:
Keyword Density
1.5%
Rating
Optimal
Our keyword density calculator uses proven SEO content analysis methods to measure keyword frequency and usage patterns. The calculation counts target keyword occurrences, divides by total words, and multiplies by 100 to determine density percentage. It also analyzes phrase patterns to ensure natural language flow.
Keyword Density = (Keyword Count ÷ Total Words) × 100%Total Words = Count of all words in contentKeyword Count = Times target keyword appearsOptimal Range = 1.0-2.5% densityThis formula calculates keyword density as a percentage of total content. Modern SEO best practices recommend 1.0-2.5% density for most content types. Below 0.5% may be under-optimized, while above 3% risks keyword stuffing penalties from search engines.
Shows optimal, under-optimized, and over-optimized density ranges
While keyword density was critical in early SEO, modern search algorithms (Google's BERT, RankBrain, MUM) focus more on semantic understanding and user intent. However, appropriate keyword usage remains important for helping search engines understand your topic. The key is maintaining 1.0-2.5% density while writing naturally, using LSI keywords, and comprehensively covering your topic for readers.
Need help with other SEO tools? Check out our SEO ROI calculator and title tag calculator.
Get Custom Calculator for Your PlatformResult: 1.5% keyword density - Optimal for SEO
Well-balanced keyword usage that supports SEO without sacrificing readability.
3 mentions in 1,000 words
Density: 0.3% - Too low, add more keywords
50 mentions in 1,000 words
Density: 5.0% - Too high, keyword stuffing risk
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Suggested hashtags: #SEO #KeywordDensity #ContentMarketing #SEOTools #Calculator