How do I convert ng/µL to nM?

Select DNA/RNA length (bp/nt) and type, then enter one known value among ng/µL, nM, or copies/µL.

How is DNA copy number calculated?

Multiply molar concentration (mol/L) by Avogadro's constant (6.022×10^23) to get copies/L.

Is the data sent anywhere?

All calculations run in your browser; data is not sent.

DNA/RNA converter (ng/µL ↔ nM ↔ copies)

Q: What does entering volume show?

It calculates total amount in the tube (ng, pmol, copies).

How to use (3 steps)

Select nucleic acid type (dsDNA, etc.) and length (bp/nt).
Enter one known value among ng/µL, nM, or copies/µL.
Other values are calculated automatically. Enter volume to see totals.

Input (type, length, concentration)

Example (preset)

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Nucleic acid type

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Length preset

Length (bp)

Factor (g/mol per bp)

Molecular weight (g/mol)

Concentration (enter one)

Mass concentration

Molar concentration

Copy concentration

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Calculate totals for the tube

Volume

Results (ng/µL, nM, copies)

Results will appear here.

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How it’s calculated

Molecular weight = length × factor (approx.)
mol/L = g/L ÷ molecular weight
copies/L = mol/L × Avogadro's constant
Entering volume yields total ng, total pmol, and total copies.

FAQ

What is 10 ng/µL in nM?

It depends on length (bp/nt) and nucleic acid type. Enter them here to convert instantly.

How are copy numbers calculated?

Multiply molar amount by Avogadro's constant to get copy count.

Why do factors differ between dsDNA and RNA?

Average molecular weight per base (pair) differs. This tool uses approximate factors.

Can I convert without length (bp/nt)?

Length is needed to estimate molecular weight. If you know the exact molecular weight, enter it directly as g/mol.

What does entering volume show?

It calculates total ng, total pmol, and total copies in the tube.

What does the share URL include?

It restores input values (type, length, units, etc.).

Feedback

Let us know issues or improvement ideas to help refine this tool.