21 free tools for AI costs, tokens, performance and more — all client-side, no API key needed.
Calculate API costs, compare model prices, and estimate chatbot expenses.
Select a model and enter token counts to calculate API costs.
Estimate monthly chatbot costs based on usage parameters.
Compare prices of all AI models in a sortable table.
Convert between tokens, words, characters, and pages.
Enter text to estimate the number of tokens it would use.
Convert between tokens, words, and characters bidirectionally.
Convert tokens to A4 pages, books, and tweets.
Visualize and calculate context window usage and costs.
Visual comparison of context window sizes across models.
Calculate how much of a model's context window you're using.
Calculate the cost of filling a model's full context window.
Calculate throughput, latency, and batch processing times.
Convert tokens per second to words per minute and pages per hour.
Estimate response time based on output length and speed.
Calculate total time and cost for batch API requests.
Visualize model sizes, calculate VRAM needs, and estimate training costs.
Compare model sizes visually with interactive charts.
Calculate GPU memory needed for different model sizes and quantization levels.
Estimate training costs based on model size and training data.
Calculate energy consumption, CO₂ emissions, and environmental impact.
Calculate energy consumption and CO₂ emissions from AI inference.
Compare energy consumption of AI vs human workers for tasks.
Convert AI carbon emissions to trees, car km, and flight hours.
Calculate ROI, compare build vs buy, and find your break-even point.
Calculate return on investment for AI implementation.
Compare costs of self-hosting vs API for AI models.
Find when your AI investment pays for itself.