> ## Documentation Index
> Fetch the complete documentation index at: https://injectivelabs-docs-ai-sdk.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Market min quantity tick size calculation

The min market quantity tick size for an order price - if a market has an minQuantityTickSize of `0.001` and order submission with the quantity of `0.0011` will be rejected.

Note that derivate markets shares the same format for minQuantityTickSize between UI and the chain, so no formatting is required.

## Spot market

1. UI human readable to chain format:
   Using on a INJ/USDT market which has 18 base decimals and 6 quote decimals as an example, here's how we convert the value to the chain format:

```js theme={null}
import { toChainFormat } from "@injectivelabs/utils";

const chainFormat = toChainFormat(value, baseDecimals).toFixed();
```

2. Chain format to UI human readable format:
   Using INJ/USDT market which has 18 base decimals and 6 quote decimals as an example, here's how we convert the value to the UI human readable format:

```js theme={null}
import { toHumanReadable } from "@injectivelabs/utils";

const humanReadableFormat = toHumanReadable(
  minQuantityTickSize,
  baseDecimals
).toFixed();
```