---
title: toBigNumber
description: "Converts a given number or hexadecimal string into a BigNumber instance for precise large-number arithmetic."
keywords: ["tobignumber", "utils", "bignumber", "hex to bignumber", "convert number", "tronweb"]
---
# toBigNumber <TitleWithCodeLink2 link="toBigNumber" />

Convert a given number or hexadecimal string to a BigNumber

### Usage

```JavaScript
TronWeb.toBigNumber(value);
```

### Parameters

| Parameter | Description                            | Data Type        |
| --------- | -------------------------------------- | ---------------- |
| value     | Number or String in hexadecimal format | String or Number |

### Returns

BigNumber - BigNumber instance

### Example

```JavaScript

const value = TronWeb.toBigNumber('200000000000000000000001');
// output-start
2.0000000000000002e+23
// output-end
console.log(value.toString(10))
// output-start
200000000000000000000001
// output-end
```