Compare total fertility rate (TFR) to the replacement level of 2.1. Estimate population trajectory and year to population peak given current fertility trends.
| Constant | Symbol | Value |
|---|---|---|
| Speed of light | c | 2.99792458×10⁸ |
| Planck's constant | h | 6.62607015×10⁻³‴ |
| Boltzmann constant | kʙ | 1.380649×10⁻²³ |
| Avogadro's number | Nₐ | 6.02214076×10²³ |
| Gravitational constant | G | 6.6743×10⁻¹¹ |
| Gas constant | R | 8.31446 |
| Elementary charge | e | 1.602176634×10⁻¹⁹ |
| Electron mass | mₑ | 9.1093837015×10⁻³¹ |
| Proton mass | mₚ | 1.67262192369×10⁻²⁷ |
| Fine-structure constant | α | 7.2973525693×10⁻³ |
Enter the values for the patient or scenario you are assessing. Compare total fertility rate (TFR) to the replacement level of 2.1. Estimate population trajectory and year to population peak given current fertility trends. Use the fertility rate result to inform your clinical assessment.