How Many Lines of Code Is 1 Million Tokens?

One million tokens is roughly 100,000 lines of source code. Code averages about 10 tokens per line — nearly twice the original Doom engine.

Why this matters

For engineering teams, token capacity directly determines how much source code an AI assistant can review, refactor, or generate in a single pass. Understanding the token cost of code versus prose helps you choose the right model and context window for code review, migration, and automated testing workflows.

≈ 100,000 lines of code lines of source code, drawn to scale

1 block = 100 lines of code

The answer

≈ 100,000 lines of code

lines of source code

The math

Basis assumption

~10 tokens per line

Calculation

Code averages roughly 10 tokens per line, so a million tokens is about 100,000 lines — nearly twice the original Doom engine (~57,000 lines).

Result

1,000,000 tokens = 100,000 lines of source code

Real-world references

To put this in perspective, here are some well-known examples for comparison.

SQLite (~150k lines)→Linux kernel (~30M lines)→Original Doom source (~57k lines)→

Related questions

How Many Words Is 1 Million Tokens?≈ 750,000 wordsHow Many Pages Is 1 Million AI Tokens?≈ 1,500 pagesHow Many Characters Is 1 Million Tokens?≈ 4,000,000 charactersHow Many Paragraphs Is 1 Million Tokens?≈ 10,000 paragraphs

See also

Explore further

All code comparisonsSee every code measurementToken calculatorEnter your budget, see what it buysModel pricing tableCompare Claude, GPT, and Gemini pricesTokens to words converterConvert any token count to words, pages, and more