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# How to Preview the Output Amount on Uniswap at a Smart Contract Level?
- URL: https://howtodapps.com/how-to-preview-the-output-amount-on-uniswap-at-a-smart-contract-level/
- Published: 2026-07-29T23:49:36.000Z
- Updated: 2026-09-11T20:44:52.000Z
- Description: Make a call to the Quoter contract on UniSwap V3.
- Author: Uncommon
- Tags: EVM

## Question:

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Hey! quick and simple question. With [uniswap v3](https://uniswap.org/?ref=howtodapps.com), at a smart contract level, how can I know or preview from before the output amount of a swap given a certain input amount?

## Answer:

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Here's how to do it:

- Join UniSwap [discord](https://discord.gg/FCfyBSbCU5?ref=howtodapps.com).
- In #*general* channel of UniSwap discord, ask to admin that you want to have access to `Channels & Roles` channel.
- Go up to `Channels & Roles` channel.
- Grab the **dev role**, by selecting developer community.

![](https://web.archive.org/web/20230617194437im_/https://www.howusedapps.com/content/images/2023/06/Screenshot_426.png)

- Now, with UniSwap V3 you can make a call to the Quoter contract which is designed to give a V3 quote of expected output / input.