This calculator can help you with calculating the following:

• molecular weight
• extinction coefficient
• nmol/OD (260)
• µg/OD (260)

Find all base notations in the list beneath the calcualtor.

Example: dT dA dG* dA* dC dA lT lT (remember to have a space in between bases)

Please note that phosphorothioated monomers shall be marked with *.

Also note that the 3'-end monomer in a fully phosphorothioated oligo has to be typed in as a phosphordiester base e.g. dG* lT* dG* dA* lA* lC* dC* lT (there are only 7 phosphorothioate bonds in an 8-mer long oligo).

See the analysis report in the bottom of the page

Tip: You can add a base by clicking on the bases beneath the calculator.

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DNA RNA UNA LNA 2’-O-Me-RNA 2’-Fluro-RNA RNA-modifications Labels Spacers Other modifications dC DNA-Cytosine dC* DNA-Cytosine* dT DNA-Thymine dT* DNA-Thymine* dA DNA-Adenine dA* DNA-Adenine* dG DNA-Guanine dG* DNA-Guanine* dI DNA-Inosine dI* DNA-Inosine* rC RNA-Cytosine rC* RNA-Cytosine* rU RNA-Uracil rU* RNA-Uracil* rA RNA-Adenine rA* RNA-Adenine* rG RNA-Guanine rG* RNA-Guanine* rI RNA-Inosine rI* RNA-Inosine* uC UNA-Cytosine uC* UNA-Cytosine* uU UNA-Uracil uU* UNA-Uracil* uA UNA-Adenine uA* UNA-Adenine* uG UNA-Guanine uG* UNA-Guanine* lC LNA-5-Me-Cytosine lC* LNA-5-Me-Cytosine* lT LNA-Thymine lT* LNA-Thymine* lA LNA-Adenine lA* LNA-Adenine* lG LNA-Guanine lG* LNA-Guanine* aC Amino-LNA-5-Me-Cytosine aC* Amino-LNA-5-Me-Cytosine* aT Amino-LNA-Thymine aT* Amino-LNA-Thymine* aA Amino-LNA-Adenine aA* Amino-LNA-Adenine* aG Amino-LNA-Guanine aG* Amino-LNA-Guanine* aC(ada) Amino-LNA-5-Me-Cytosine-ada aC(ada)* Amino-LNA-5-Me-Cytosine-ada* aC(gly) Amino-LNA-5-Me-Cytosine-gly aC(gly)* Amino-LNA-5-Me-Cytosine-gly* aC(pyr) Amino-LNA-5-Me-Cytosine-pyr aC(pyr)* Amino-LNA-5-Me-Cytosine-pyr* aT(ada) Amino-LNA-Thymine-ada aT(ada)* Amino-LNA-Thymine-ada* aT(gly) Amino-LNA-Thymine-gly aT(gly)* Amino-LNA-Thymine-gly* aT(pyr) Amino-LNA-Thymine-pyr aT(pyr)* Amino-LNA-Thymine-pyr* mC 2’-O-Me-RNA-C mC* 2’-O-Me-RNA-C* mT 2’-O-Me-RNA-T mT* 2’-O-Me-RNA-T* mA 2’-O-Me-RNA-A mA* 2’-O-Me-RNA-A* mG 2’-O-Me-RNA-G mG* 2’-O-Me-RNA-G* mU 2’-O-Me_RNA-U mU* 2’-O-Me_RNA-U* mI 2’-O-Me-RNA-Inosine mI* 2’-O-Me-RNA-Inosine* fC F-DNA-Cytosine fC* F-DNA-Cytosine* fT F-DNA-Thymine fT* F-DNA-Thymine* fA F-DNA-Adenine fA* F-DNA-Adenine* fG F-DNA-Guanine fG* F-DNA-Guanine* hC 4’-C-CH2OH-DNA-5-Me-Cytosine hC* 4’-C-CH2OH-DNA-5-Me-Cytosine* hT 4’-C-CH2OH-DNA-Thymine hT* 4’-C-CH2OH-DNA-Thymine* hA 4’-C-CH2OH-DNA-Adenine hA* 4’-C-CH2OH-DNA-Adenine* hG 4’-C-CH2OH-DNA-Guanine hG* 4’-C-CH2OH-DNA-Guanine* Biotin Biotin Biotin* Biotin* BiotinTEG BiotinTEG BiotinTEG* BiotinTEG* 3BiotinTEG BiotinTEG CPG 3BiotinTEG* BiotinTEG CPG* 5PCbiotin 5’-PC-Biotin 5PCbiotin* 5’-PC-Biotin* 5Biotin 5’-Biotin 5Biotin* 5’-Biotin* BiotindT Biotin-dT BiotindT* Biotin-dT* DesthiobiotinTEG DesthiobiotinTEG DesthiobiotinTEG* DesthiobiotinTEG* 3DesthiobiotinTEG DesthiobiotinTEG CPG 3DesthiobiotinTEG* DesthiobiotinTEG CPG* Fam Fluorescein Fam* Fluorescein* 5Fam 5’-Fluorescein 5Fam* 5’-Fluorescein* 3Fam 3’-Fluorescein CPG 3Fam* 3’-Fluorescein CPG* 3FamdT 3’-Fluorescein-dT CPG 3FamdT* 3’-Fluorescein-dT CPG* 36Fluorescein 3’-(6-Fluorescein) CPG 36Fluorescein* 3’-(6-Fluorescein) CPG* Hexchlofam 5’-Hexachloro-Fluorescein Hexchlofam* 5’-Hexachloro-Fluorescein* Tetchlofam 5’-Tetrachloro-Fluorescein Tetchlofam* 5’-Tetrachloro-Fluorescein* 6Fam 6-Fluorescein 6Fam* 6-Fluorescein* FamdT Fluorescein-dT FamdT* Fluorescein-dT* PsoraleneC2 Psoralene C2 PsoraleneC2* Psoralene C2* PsoraleneC6 Psoralene C6 PsoraleneC6* Psoralene C6* Cy3 Cy3 Cy3* Cy3* Cy35 Cy3.5 Cy35* Cy3.5* Cy5 Cy5 Cy5* Cy5* Cy55 Cy5.5 Cy55* Cy5.5* 3Dabsyl 3’-Dabsyl CPG 3Dabsyl* 3’-Dabsyl CPG* 3Dabcyl 3’-Dabcyl CPG 3Dabcyl* 3’-Dabcyl CPG* 3DabcylPS 3’-Dabcyl PS 3DabcylPS* 3’-Dabcyl PS* 5Dabcylphos 5’-Dabcyl Phosphor 5Dabcylphos* 5’-Dabcyl Phosphor* DabcyldT Dabcyl-dT DabcyldT* Dabcyl-dT* 36FamPS 3’-(6-FAM) PS 36FamPS* 3’-(6-FAM) PS* 36Fam 3’-(6-FAM) CPG 36Fam* 3’-(6-FAM) CPG* dSpacer dSpacer dSpacer* dSpacer* SpacerC3 Spacer C3 SpacerC3* Spacer C3* 3SpacerC3 3’-Spacer C3 CPG 3SpacerC3* 3’-Spacer C3 CPG* Spacer9 Spacer 9 Spacer9* Spacer 9* SpacerC12 Spacer C12 CE SpacerC12* Spacer C12 CE* Spacer18 Spacer18 Spacer18* Spacer18* Pcspacer PC Spacer Pcspacer* PC Spacer* 5Phosphate 5-Phosphorylation 5Phosphate* 5-Phosphorylation* 3Phosphate 3’-Phosphate CPG 3Phosphate* 3’-Phosphate CPG* CholesterylTEG Cholesteryl-TEG CholesterylTEG* Cholesteryl-TEG* 3CholesterylTEG Cholesteryl-TEG CPG 3CholesterylTEG* Cholesteryl-TEG CPG* 3CholTEG 3’-Cholesteryl-TEG CPG 3CholTEG* 3’-Cholesteryl-TEG CPG* Acridine Acridine Acridine* Acridine* 5CarboxyC10 5’-Carboxy-Modifier C10 5CarboxyC10* 5’-Carboxy-Modifier C10* 5AminoC3 5’-Amino-Modifier-C3-TFA 5AminoC3* 5’-Amino-Modifier-C3-TFA* 5Aminoc6TFA 5’-Amino-Modifier-C6-TFA 5Aminoc6TFA* 5’-Amino-Modifier-C6-TFA* 5AminoC6 5’-Amino-Modifier C6 5AminoC6* 5’-Amino-Modifier C6* 5AminoC12 5’-Amino-Modifier C12 5AminoC12* 5’-Amino-Modifier C12* 5Amino5 5’-Amino-Modifier 5 5Amino5* 5’-Amino-Modifier 5* 3AminoC6dC 3’-Amino-Modifier C6 dC CPG 3AminoC6dC* 3’-Amino-Modifier C6 dC CPG* 3AminoC6dT 3’-Amino-Modifier C6 dT CPG 3AminoC6dT* 3’-Amino-Modifier C6 dT CPG* 3AminoC7 3’-Amino-Modifier C7 CPG 3AminoC7* 3’-Amino-Modifier C7 CPG* AminoC2dT Amino-Modifier C2 dT AminoC2dT* Amino-Modifier C2 dT* AminoC6dC Amino-Modifier C6 dC AminoC6dC* Amino-Modifier C6 dC* AminoC6dT Amino-Modifier C6 dT AminoC6dT* Amino-Modifier C6 dT* AminoC6dA Amino-Modifier C6 dA AminoC6dA* Amino-Modifier C6 dA* AminoC6dG Amino-Modifier C6 dG AminoC6dG* Amino-Modifier C6 dG* 3PTaminoC3 3’-PT-Amino-Modifier C3 CPG 3PTaminoC3* 3’-PT-Amino-Modifier C3 CPG* 3PTaminoC6 3’-PT-Amino-Modifier C6 CPG 3PTaminoC6* 3’-PT-Amino-Modifier C6 CPG* 3PTaminoC6PS 3’-PT-Amino-Modifier C6 PS 3PTaminoC6PS* 3’-PT-Amino-Modifier C6 PS* 5ThiolC6 5’-Thiol-Modifier C6 5ThiolC6* 5’-Thiol-Modifier C6* 3Thiolc3ss 3’-Thiol-Modifier C3 S-S CPG 3Thiolc3ss* 3’-Thiol-Modifier C3 S-S CPG* Thiolc6ss Thiol-Modifier C6 S-S Thiolc6ss* Thiol-Modifier C6 S-S* Dithiolphos Dithiol Phosphor Dithiolphos* Dithiol Phosphor* Pcaminophos PC Amino-Modifier Phosphor Pcaminophos* PC Amino-Modifier Phosphor* 5MedCbrancher 5-Me-dC Brancher 5MedCbrancher* 5-Me-dC Brancher* Pclinker PC Linker Pclinker* PC Linker* CarboxydT Carboxy-dT CarboxydT* Carboxy-dT* 3Glyceryl 3’-Glyceryl CPG 3Glyceryl* 3’-Glyceryl CPG*

Disclaimer: This calculator does not save any sequences. RiboTask takes no responsibility for mistakes or errors occuring during calculations. Please note that some of the modifications or labels included in the calculator may be protected by patents or patent applications.