dsDNA pmol Calculator — oligo duplex
Convert a oligo duplex mass (ng) and length (bp) into picomoles of dsDNA. pmol = ng × 1000 / (bp × 650).
- 1pmol = ng×1000/(bp×650)
1.538 pmol
🔒 100% client-side — your data is computed in the browser and never uploaded.
Cite this tool
ToolJolt. dsDNA pmol Calculator — oligo duplex. ToolJolt Chemistry & Lab Tools; 2026. https://tooljolt.comdsDNA pmol Calculator — oligo duplex for molecular cloners and synthetic biologists. Enter your values and read a sourced, step-by-step result instantly, right in your browser.
About dsDNA pmol Calculator — oligo duplex
Convert a oligo duplex mass (ng) and length (bp) into picomoles of dsDNA. pmol = ng × 1000 / (bp × 650). The calculation uses pmol = ng × 1000 / (bp × 650). The stakes: 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. Watch out for: too little or too much insert; stale ligase or ATP; using a mass ratio instead of a molar ratio. Because the calculation happens entirely client-side, you can use it offline and with confidential data, then cite the stable URL in your methods or teaching notes.
How to use dsDNA pmol Calculator — oligo duplex
- 1Enter your values: DNA mass, Length.
- 2Read the headline result and the supporting figures, which recompute as you type.
- 3Open “Worked example with your numbers” to see the substituted formula step by step.
- 4Copy the result, or use the cite-this-tool snippet for your methods section.
Why use dsDNA pmol Calculator — oligo duplex?
- ✓Copy-ready result and a one-line “cite this tool” snippet for your methods section
- ✓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
Frequently asked questions
Any tips specific to this calculation?+
Average dsDNA base pair ≈ 650 g/mol. Also watch out for: too little or too much insert and ignoring fragment length when converting ng↔pmol.
Is this dsdna pmol calculator — oligo duplex free to use?+
Yes. It is completely free, needs no sign-up, and runs entirely in your browser — there are no usage limits.
What formula does it use?+
It uses pmol = ng × 1000 / (bp × 650) The full worked example is shown beneath the result so you can verify each step.
What are the most common mistakes here?+
In molecular cloning, watch for: using a mass ratio instead of a molar ratio; ignoring fragment length when converting ng↔pmol; too little or too much insert; stale ligase or ATP. This tool shows the working so you can catch these before they cost an experiment.
Does my data leave my device?+
No. All computation happens locally in your browser. Nothing you enter — sequences, concentrations or measurements — is uploaded to any server, so it is safe for confidential work.
Can I cite this tool?+
Yes — use the “Cite this tool” snippet on the page. Many users link these calculators from methods sections, lab SOPs and teaching materials.
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