Frequently Asked Questions
Why do my years not match my birthday math?
The calculator uses 365.25 days per year. Your birthday says how many full birthdays you have had, which uses calendar years, not day count.
What is the maximum age this works for?
Effectively unlimited. JavaScript dates handle plus or minus ~270,000 years, so any human age is fine.
Heartbeats per minute average?
Resting adult heart rate is 60-100 BPM. The calculator uses 70 as a midpoint. Use a wearable for personal estimates.
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Estimates for informational purposes only.
Important Disclaimer: Estimates for informational purposes only.
This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.