Calculate Oligonucleotide Properties

This tool allows You to calculate the physical properties of modified and mixmer oligonucleotides including commonly used 3' and 5' modifications.
You can calculate: Molecular Weight (DMT-ON/OFF), Molar Extinction Coefficient, Concentration, Theoretical Melting Temperature, GC Content, Inverse Complement
With an Oligowizard account, you can even add your own nucleic acid building blocks and customise the calculations!
To start enter the sequence below and select the modifications You would like to include.

Enter Your Sequence Here:



Nucleotide Letter Code for 2' Modifications:

DNA: A / C / G / T
RNA: D / E / F / U
LNA: H / I* / J / K
MOE: L / M* / N / O
OMe: P / Q / R / S
2'- F: V / W / X / Y
* 5-Me

Nucleotide Code Conversion Tool

Backbone on 3' Linkage:

Capital Letters: Phosphodiester (PO)
Lower Case: Phosphothioate (PS)

Absorbance and Volume

Measured absorbance and volume to calculate the concentration and amount of your oligo

Measured absorbance
A260
Volume
µL

Salt Concentrations:

You may specify Ion Concentrations to adjust melting temperature Calculations

mM Na+
mM K+
mM Mg2+

3'-Modification:


Default


Phosphates



Dyes / Quenchers






Amines




Thiols

5'-Modification:


Default


Phosphates



Dyes / Quenchers






Misc. Linkers




Amines







Carboxylic acids



Thiols




Recently Used: