RNA Molecular Weight Calculator
RNA molecular weight = nt x 320.5 + 159 g/mol.
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Introduction
RNA Molecular Weight Calculator — RNA molecular weight = nt x 320.5 + 159 g/mol. Enter Length (nt) to get an instant, accurate result.
Formula
Single-stranded RNA molecular weight ≈ (number of nucleotides × 320.5) + 159 g/mol — an average per-nucleotide mass plus a small terminal-group correction.
Step-by-step
- Enter the Length (nt).
- Click Calculate to see your result instantly.
Real-world example
Example: With Length (nt) = 1000, the RNA Molecular Weight Calculator gives Molecular Weight G Mol: 320659.
Frequently Asked Questions
Why is the RNA per-nucleotide weight different from DNA's?
RNA nucleotides carry a ribose sugar with an extra hydroxyl group (versus DNA's deoxyribose) and RNA is calculated as single-stranded rather than double-stranded, so the average mass and formula differ from the dsDNA estimate.
Does this work for both mRNA and other RNA types?
It works as a general nucleotide-count-based estimate for any single-stranded RNA molecule, since it only depends on the number of nucleotides, not the specific base sequence.
What inputs does the RNA Molecular Weight Calculator need?
You'll need to provide: Length (nt). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the RNA Molecular Weight Calculator?
The RNA Molecular Weight Calculator applies the formula exactly as calculated — Single-stranded RNA molecular weight ≈ (number of nucleotides × 320.5) + 159 g/mol — an average per-nucleotide mass plus a small terminal-group correction. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the RNA Molecular Weight Calculator free to use?
Yes, the RNA Molecular Weight Calculator is completely free, requires no signup, and runs instantly in your browser.
About the RNA Molecular Weight Calculator
The RNA Molecular Weight Calculator uses a real, verifiable formula — Single-stranded RNA molecular weight ≈ (number of nucleotides × 320.5) + 159 g/mol — an average per-nucleotide mass plus a small terminal-group correction. — so results are accurate every time, not an approximation.