Cell doubling time
Cell doubling time: use initial count, final count, elapsed time. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Doubling time = elapsed time × ln2/ln(final/initial)
Variables & units
- Initial count
- Numeric value · minimum 0.000001, maximum 1000000000000
- Final count
- Numeric value · minimum 0.000001, maximum 1000000000000
- Elapsed time
- h · minimum 0.000001, maximum 1000000000000
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Assumes exponential growth between two measurements; does not validate a culture model.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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