---
description: "Constructs a BigNumber instance from a number or hexadecimal string using the bundled bignumber.js for precise arithmetic."
keywords: ["bignumber", "utils", "bignumber.js", "big number", "precision", "tronweb"]
---

# BigNumber

Convert a given number or hexadecimal string to a BigNumber.

### Usage

```JavaScript
new BigNumber(value);
```

### Parameters

| Parameter | Description           | Data Type |
| --------- | --------------------- | --------- |
| value     | The value to be converted | Any       |

### Returns

BigNumber - BigNumber instance

Example

```JavaScript
import { BigNumber } from 'tronweb';
const value = new BigNumber('200000000000000000000001');
```

**Note**:
- TronWeb v4.0.0 updated bignumber.js to v9.0.1, which is a breaking change.
- If you get a result after triggerConstantContract or call method, do not use TronWeb.BigNumber(result) which will get null. Thus：
- TronWeb v4.0.0 and later：tronWeb.toBigNumber(result) or tronWeb.BigNumber(result.\_hex)
- TronWeb version before v4.0.0：tronWeb.BigNumber(result)