How to use the virus titre by plaque assay calculator
Find the virus titre in plaque forming units per millilitre from plaque counts. Enter plaques counted, dilution factor, volume plated in the fields above; the titre, titre as log10 are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “plaque assay titer”, “PFU per mL”, “virus titre calculation”, “calculate virus titre by plaque assay”, “find titre”.
Formula
Variables
- pl — Plaques counted (plaques)
- dil — Dilution factor
- V — Volume plated (mL)
Worked example
With plaques counted = 42 plaques, dilution factor = 0.00001, volume plated = 0.1 mL, the calculator gives titre ≈ 42,000,000 PFU/mL; titre as log10 ≈ 7.623249 log PFU/mL.
Frequently asked questions
What is the virus titre by plaque assay calculator used for?
Find the virus titre in plaque forming units per millilitre from plaque counts. It helps with questions such as “plaque assay titer”, “PFU per mL”, “virus titre calculation”.
What is the formula for the virus titre by plaque assay calculation?
Titre (PFU/mL) = pl / (dil × V). Titre as log10 (log PFU/mL) = log10([Titre]). Here pl is plaques counted (plaques), dil is dilution factor, V is volume plated (mL).
What inputs do I need for the virus titre by plaque assay calculator?
You need plaques counted in plaques, dilution factor, volume plated in mL. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the virus titre by plaque assay calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the virus titre by plaque assay result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.