# Bin Id From Price

As mentioned previously, it is possible to link a `bin` to a price. It is also possible to perform the conversion in the other direction and thus link a price to a `bin`. We provide examples to get the `binId` from a price.

#### Conversion Functions

As the previous example, it is necessary to know the `binStep` of the underlying pair. Here is the conversion logic.

{% tabs %}
{% tab title="Typescript" %}

```typescript
function getIdFromPrice(price: number, binStep: number): number {
  /**
   * Convert a price to the underlying binId.
   *
   * @param price - Price of the bin.
   * @param binStep - BinStep of the pair.
   * @return BinId of the underlying bin.
   */

  return Math.trunc(Math.log(price) / Math.log(1 + binStep / 10_000)) + 8388608;
}
```

{% endtab %}

{% tab title="Python" %}

```python
import math

def getIdFromPrice(price: float, binStep: int) -> int:
    """
    Convert a price to the underlying binId.

    :param price: Price of the bin.
    :param binStep: BinStep of the pair.
    :return: Id of the underlying bin.
    """

    return (
      math.trunc(math.log(price) / math.log(1 + binStep / 10_000)) + 8388608
    )
```

{% endtab %}
{% endtabs %}

#### Example

Here is an example to illustrate the conversion function with the [`sAVAX`/`AVAX`](https://lfj.gg/avalanche/pool/v21/0x2b2c81e08f1af8835a78bb2a90ae924ace0ea4be/AVAX/5) pair which has a `binStep` of 5. We choose here a price equal to 1.075, as both tokens have 18 decimals.

```python
getIdFromPrice(1.075, 5)
>>> 8388752
```

For second example, let's take [BTC.b/USDC](https://lfj.gg/avalanche/pool/v21/0x152b9d0fdc40c096757f570a51e494bd4b943e50/0xb97ef9ef8734c71904d8002f8b6bc66dd9c48a6e/10) pair which has a `binStep` of 10. To choose price equal to 30000 USDC / BTC.b we need to adjust it

$$
priceAdjusted = price\cdot 10^{(\text{decimalsY} - \text{decimalsX})}
$$

$$
priceAdjusted = 30 000 \cdot 10^{(\text{6} - \text{8})} = 300
$$

```python
getIdFromPrice(300, 10)
>>> 8394314
```


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