How to use this tool
- Enter each labeled measurement using the units shown.
- Review the formula and assumptions, then calculate.
- Read the result with its output unit; change inputs to compare scenarios.
Try this example
{"w": 1200.0, "r": 200.0}Accuracy and scope
User-selected reading speed; excludes pauses and diagrams. Uses finite JavaScript floating-point arithmetic. Keep compatible units; rounded display values are not exact symbolic results. Estimates are not engineering certification or financial advice.
Is my data uploaded?
This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.