---
title: "Molecular Biology Calculators | XTRAW Tools"
description: "Molecular biology calculators for protein molecular weight, GC content, reverse complement, DNA melting temperature, DNA/RNA sequence analysis, and biomolecule mass estimates."
url: "https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators"
date: "2026-08-20T15:37:19+00:00"
language: "en-GB"
---

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 # Molecular Biology Calculators

#### Latest Tools

 [ ![DNA Melting Temperature Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-dna-melting-temperature-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/dna-melting-temperature-calculator "DNA Melting Temperature Calculator")  new

## [DNA Melting Temperature Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2402&virtuemart_category_id=249&Itemid=173)

 Estimate the melting temperature (Tm) of a short DNA ...

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 [ ![DNA Reverse Complement Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-dna-reverse-complement-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/dna-reverse-complement-calculator "DNA Reverse Complement Calculator")  new

## [DNA Reverse Complement Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2401&virtuemart_category_id=249&Itemid=173)

 Generate the reverse complement of a DNA sequence. Use this ...

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 [ ![GC Content Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-gc-content-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/gc-content-calculator "GC Content Calculator")  new

## [GC Content Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2400&virtuemart_category_id=249&Itemid=173)

 Calculate GC content percentage of a DNA or RNA sequence. ...

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#### Products

 [ ![DNA Molecular Weight Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-dna-molecular-weight-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/dna-molecular-weight-calculator "DNA Molecular Weight Calculator")  new

## [DNA Molecular Weight Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2397&virtuemart_category_id=249&Itemid=173)

 Estimate molecular weight of a single-stranded or ...

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 [ ![Protein Molecular Weight Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-protein-molecular-weight-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/protein-molecular-weight-calculator "Protein Molecular Weight Calculator")  new

## [Protein Molecular Weight Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2399&virtuemart_category_id=249&Itemid=173)

 Estimate protein molecular weight from number of amino ...

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 [ ![RNA Molecular Weight Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-rna-molecular-weight-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/biology-calculators/molecular-biology-calculators/rna-molecular-weight-calculator "RNA Molecular Weight Calculator")  new

## [RNA Molecular Weight Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2398&virtuemart_category_id=249&Itemid=173)

 Estimate molecular weight of a single-stranded RNA ...

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