Cell Culture Calculator

A free online cell culture calculator with hemocytometer cell counting (4-quadrant averaging with dilution factor), dilution calculator, multi-well plate seeding density (6/12/24/48/96-well), and doubling time estimation. Includes common cell line presets (HeLa, HEK293, CHO) — all calculated in your browser with no data uploaded.

Quadrant Counts

Dilution Factor

Total Suspension Volume (mL)

Viability

Result

Average Count

48.8

Cell Density

975.00 × 10³

cells/mL

Total Cells

9.75 × 10⁶

Viability

90.0%

Cell Line Presets

Cell Line	Doubling Time	Seeding	Split
HeLa	24h	10.00 × 10³/cm²	1:4–1:8
HEK293	34h	50.00 × 10³/cm²	1:4–1:6
HEK293T	24h	50.00 × 10³/cm²	1:5–1:10
CHO	20h	5.00 × 10³/cm²	1:6–1:10
MDCK	26h	20.00 × 10³/cm²	1:5–1:10
NIH3T3	20h	7.00 × 10³/cm²	1:5–1:10
MCF-7	29h	20.00 × 10³/cm²	1:3–1:6
A549	22h	10.00 × 10³/cm²	1:3–1:6
Jurkat	25h	100.00 × 10³/cm²	1:5–1:10
U2OS	30h	10.00 × 10³/cm²	1:4–1:8

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What is a Cell Culture Calculator?

A cell culture calculator is a laboratory tool that automates common calculations in mammalian cell culture work. It converts hemocytometer quadrant counts to cells/mL, determines dilution volumes for achieving target cell densities, calculates seeding amounts for different plate formats, and estimates doubling time from growth data. These calculations are essential daily tasks in cell biology, drug screening, and tissue engineering laboratories.

How to Use This Calculator

Select a calculation mode: Hemocytometer, Dilution, Seeding, or Doubling Time
For hemocytometer: enter 4 quadrant counts, dilution factor, and optional total volume
For dilution: enter current density, target density, and target volume
For seeding: select plate type, enter target density and stock suspension density
For doubling time: enter initial count, final count, and time elapsed
View results instantly and copy for your lab notebook

Frequently Asked Questions

How do I count cells with a hemocytometer?

Load 10µL of cell suspension onto the hemocytometer chamber. Count cells in 4 corner squares (1mm × 1mm each). The calculator averages the counts and multiplies by the dilution factor and 10⁴ to give cells/mL.

What seeding density should I use for a 96-well plate?

Typical seeding densities depend on the cell line and experiment. For adherent cells, 5,000-20,000 cells/well is common for 96-well plates. For growth assays, lower densities (1,000-5,000) are used. Select a cell line preset for recommended densities.

How is doubling time calculated?

Doubling time (td) = ln(2)/µ, where µ is the growth rate calculated as µ = ln(Nf/Ni)/t. Nf is final count, Ni is initial count, and t is time in hours. This assumes exponential growth phase.