Free LLM Context Window & Memory Token Calculator Online
Calculate memory and token footprint across 8K, 32K, 128K, and 1M context windows. Estimate document pages fitting in prompt memory. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Context Window Tier
Choose 8,192 (Llama), 32,768, 128,000 (GPT-4o), or 1,000,000 (Gemini).
Inspect Document Capacity
See exact equivalent in single-spaced pages (~500 words/page) and standard books.
Estimate Memory KV Cache Size
Review estimated GPU VRAM required for KV cache at FP16/BF16.
Frequently Asked Questions
Related Math & Science Calculators & Utilities
Interlinked precision tools in the Math & Science collection.
AI Token & LLM API Cost Calculator (GPT-4o, Claude 3.5 & Llama)
Calculate exact token consumption (BPE heuristic ~4 chars/token) and forecast API costs across OpenAI GPT-4o, Claude 3.5 Sonnet, and Llama 3.
Scientific Calculator (Trigonometry, Logarithms & Powers)
High-precision scientific calculator supporting sine, cosine, tangent, natural log (ln), exponential powers, square roots, and radian/degree modes.
Quadratic Equation Solver (Real & Complex Roots with Steps)
Solve any quadratic equation ax² + bx + c = 0 instantly. Computes discriminant (b² - 4ac), real roots, and complex imaginary roots with full steps.
Standard Deviation & Variance Calculator (Sample & Population)
Calculate Population (σ) and Sample (s) Standard Deviation, Variance, Mean, Sum of Squares, and Margin of Error for any numeric dataset.
Permutations & Combinations Calculator (nPr & nCr)
Calculate combinations nCr (order does not matter) and permutations nPr (order matters) with full factorials and step-by-step breakdown.
Percentage Increase & Decrease Calculator
Calculate percentage increase, percentage decrease, and percentage difference between any two values with step-by-step algebraic math.