Hemocytometer Cell Count Calculator
Calculate total cell concentration, live cell concentration, and viability percentage from hemocytometer (Neubauer chamber) counts using trypan blue exclusion.
Hemocytometer Cell Count
basicCalculate cell concentration and viability using a hemocytometer
Formula
Cells/mL = (cells/grids) × dilution × 10⁴
Scenario A
How It Works
The hemocytometer (Neubauer chamber) is a specialized microscope slide with a precise grid for counting cells. The grid has 9 large squares, each with an area of 1 mm² and a depth of 0.1 mm, giving a volume of 0.1 µL per square.
Cells/mL = (cells counted / grids) × dilution factor × 10⁴
Viability (%) = live cells / (live + dead) × 100
The factor of 10⁴ converts the volume of one grid square (0.1 µL) to 1 mL.
Example
You count 80 live cells and 20 dead cells across 4 grid squares with a 2× dilution (trypan blue mix):
Total cells = 80 + 20 = 100
Total cells/mL = (100/4) × 2 × 10⁴ = 500,000 cells/mL
Live cells/mL = (80/4) × 2 × 10⁴ = 400,000 cells/mL
Viability = 80/100 × 100 = 80%
Frequently Asked Questions
How many cells should I count per grid?
Aim for 30-300 cells per grid square for statistical accuracy. If too crowded (>>300), dilute your sample. If too sparse (<30), concentrate or count more grids.
What is a good viability percentage?
For most cell culture work, viability above 90% is excellent, 80-90% is acceptable, and below 70% indicates significant cell stress or death.
Should I count cells on the border lines?
Standard practice: count cells touching the top and left borders, exclude those touching bottom and right borders. This prevents double-counting between adjacent squares.
Save Configuration Snapshot
Save current parameters to your dashboard for instant one-click reloading.
About This Calculator & Guide
About the Hemocytometer Cell Count Calculator
The Hemocytometer Cell Count Calculator is a specialized online utility designed to help you calculate cell concentration and viability using a hemocytometer (neubauer chamber). free online cell counting calculator with trypan blue viability. It performs calculations in real-time to provide immediate, reliable estimates for study, work, or daily tasks.
How to Use
Simply enter your parameters in the input fields of the calculator widget above. The tool evaluates the inputs instantly and displays the results in real-time. You can modify any value to check alternate scenarios and compare figures dynamically.
Data Privacy & Safety
All calculations are executed locally within your web browser. No inputs are sent to our servers or stored externally, ensuring your personal and financial details remain completely private and secure.
FAQ
Frequently Asked Questions
What does the Hemocytometer Cell Count Calculator do?+
Calculate cell concentration and viability using a hemocytometer (Neubauer chamber). Free online cell counting calculator with trypan blue viability. It is designed for quick everyday use and gives clear results without requiring a sign in.
Is the Hemocytometer Cell Count Calculator free to use?+
Yes. The Hemocytometer Cell Count Calculator is free to use online and works directly in your browser.
Can I use the Hemocytometer Cell Count Calculator on mobile?+
Yes. The calculator layout is responsive, so you can use it on phones, tablets, laptops, and desktop screens.