dsDNA pmol Calculator — blunt fragment

About dsDNA pmol Calculator — blunt fragment

Convert a blunt fragment mass (ng) and length (bp) into picomoles of dsDNA. pmol = ng × 1000 / (bp × 650). The calculation uses pmol = ng × 1000 / (bp × 650). Why accuracy here pays off: Ligation and assembly efficiency hinge on the molar ratio of insert to vector — not the mass ratio. Because long fragments contain fewer moles per ng, a 'balanced' mass mix can be wildly off in moles. Average dsDNA base pair ≈ 650 g/mol. Mistakes that trip people up: stale ligase or ATP; using a mass ratio instead of a molar ratio; ignoring fragment length when converting ng↔pmol. No account, no upload, no tracking of your inputs — the result is generated on your machine, which makes it reproducible, private and citable in published work.

How to use dsDNA pmol Calculator — blunt fragment

1. 1Enter your values: DNA mass, Length.
2. 2Read the headline result and the supporting figures, which recompute as you type.
3. 3Open “Worked example with your numbers” to see the substituted formula step by step.
4. 4Copy the result, or use the cite-this-tool snippet for your methods section.

Why use dsDNA pmol Calculator — blunt fragment?

• ✓Designed for molecular cloners and synthetic biologists who need a trustworthy answer fast
• ✓Instant, client-side result — works offline once loaded and keeps your data private
• ✓Shows the worked example step by step with your own numbers, not just a final figure
• ✓Pre-filled with sensible, niche-specific defaults so it is useful the second it loads
• ✓Mobile-friendly and completely free, with no sign-up or usage caps

Frequently asked questions

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