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Molarity Calculator

Convert between ng/µL and µM for DNA/RNA

About Molarity Conversions

This calculator converts between mass concentration (ng/µL) and molar concentration (µM) for nucleic acids. Understanding both units is essential for molecular biology applications.

Molarity (µM) = [mass (ng/µL) × 10⁶] / molecular weight (g/mol)

Note: For DNA, molecular weight ≈ length (bp) × 650 Da/bp

PCR Product Molecular Weight Calculator

COI barcode = 658 bp
ng/µL
g/mol
Use calculator above or enter directly

Result

Molar Concentration:

-
µM
g/mol
Use calculator above or enter directly

Result

Mass Concentration:

-

Example

You have DNA at 50 ng/µL and your PCR product is 658 bp (COI barcode):