Tempo dobramento células
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
ln2 / μ
About this calculator
The cell doubling time calculator estimates the period required for a cell population to double using the formula t_d = ln(2)/μ, where μ is the specific growth rate. This calculation is vital in cell biology to predict cell division cycles in cultures, growth experiments, or tissue division studies.
The formula accounts for the natural growth rate (μ) of cells, which varies depending on cell type, medium conditions, and temperature. Accurate results require using the correct μ value, obtained experimentally or from scientific literature. This tool is applied in cell culture research, tissue engineering, and tumor growth analysis.
Note: the formula assumes ideal exponential growth without space or nutrient limitations. In real environments, factors like cellular competition and metabolic variations can distort calculated times. Always validate results with experimental data in controlled settings.
Frequently asked questions
Why use ln(2) in the formula?
ln(2) is a natural constant from exponential growth calculations, as doubling occurs when the base e (Euler number) raised to time multiplied by growth rate μ equals 2.
How to determine the growth rate (μ)?
Measure cell concentration at regular intervals and calculate the slope of the logarithmic growth vs. time graph.
What if the growth rate μ is zero?
If μ = 0, doubling time becomes infinite, meaning the population isn't growing. Check experimental conditions or cell type.
Does this formula apply to all cell types?
No, only to populations in exponential growth phase. Cells in stationary phase or dead cells don't follow this formula.