caffeine half life calculator
Based on a 5.7-hour half-life model. Track caffeine decay and estimate the best cutoff time for intake.
Most people run these right after finishing here.
Yes. Every tool in the register is free, with no account and no sign-up.
No. The tool runs entirely in your browser and your input never leaves your device.
Once the page has loaded, all processing happens locally, so it keeps working without a connection.
Copy this snippet to place the tool on your own page. It keeps running locally in the browser and links back to the register.