Useful tools

Useful Tools

Practical worksheets for common questions. Calculations stay in your browser, no account is required, and results are not professional advice.

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AI Cost Calculator

Estimate AI usage cost using your own token counts and rates.

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Calculate a gain or loss using values you enter.

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Estimate loan payments and selected ownership costs using your own figures.

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Organize vehicle details before checking the official NHTSA recall service.

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Estimate energy, ideal charging time and electricity cost from values you enter.

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Compare an amount across July CPI-U readings from 2020 through 2026.

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Estimate how long a file transfer takes from file size and connection speed.

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Compare fuel and electricity cost for the same trip using values you enter.

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Compare the approximate energy release represented by two earthquake magnitudes.