user34299: I have searched the Internet for solution but could not find the one I was looking for. 
I want to get bitcoin price (in usd) without using any external website (meaning not getting the price using api or something) 
I want to "calculate" it myself, since there are websites who display their bitcoin price and it's slightly different from other websites I guess they found the price from their own. 
How can I find the bitcoin price by myself? 

user15430: The year is now 2023, and there has been a proliferation of cryptocurrencies. You still need to ask a crypto exchange. You still can't see the dollar transactions whenever someone trades a bitcoin, on the bitcoin blockchain, so you don't know what they paid for the bitcoin.
But if you're willing to look at a different blockchain, you may ask a decentralized, blockchain-based crypto exchange, for example, the Uniswap V3 WBTC-USDC pool on Ethereum. As long as WBTC is still exchangeable for BTC, and USDC is still exchangeable for dollars, and Uniswap V3 is still a protocol that people use, you can assume this is the price people trade bitcoins for dollars on this platform. (If it very different from the bitcoin price, then someone would trade it and make free money. That's why there's only one price.)
You don't have to read it from the info.uniswap.org website - after getting familiar with Ethereum, you could read it from the blockchain. The information is still invisible to the Bitcoin blockchain, but since the Ethereum blockchain is working as a crypto exchange, the information about its trades is available on that blockchain.

user15430: You may be thinking with cause and effect reversed. The Bitcoin price being $300 does not cause people to buy and sell at $300. Rather, people buying and selling at $300 causes the price to be $300.
Obviously, there is no way to find out what price people buy and sell bitcoins at without buying or selling bitcoins, or asking someone else who's buying or selling bitcoins, or asking an exchange that bitcoins get bought and sold through.

user26873: The bitcoin price is determined by a free market of buyers and sellers. There is no way to calculate the price on your own without an external source. I suppose the only exception to this would be if you ran your own bitcoin exchange and you had enough users and volume to produce a fair market price.

34299: <p>I have searched the Internet for solution but could not find the one I was looking for. </p>

<p>I want to get bitcoin price (in usd) without using any external website (meaning not getting the price using api or something) </p>

<p>I want to "calculate" it myself, since there are websites who display their bitcoin price and it's slightly different from other websites I guess they found the price from their own. </p>

<p>How can I find the bitcoin price by myself? </p>
 15430: <p>The year is now 2023, and there has been a proliferation of cryptocurrencies. You still need to ask a crypto exchange. You still can't see the dollar transactions whenever someone trades a bitcoin, on the bitcoin blockchain, so you don't know what they paid for the bitcoin.</p>
<p>But if you're willing to look at a different blockchain, you may ask a decentralized, blockchain-based crypto exchange, for example, the <a href="https://info.uniswap.org/#/pools/0x99ac8ca7087fa4a2a1fb6357269965a2014abc35" rel="nofollow noreferrer">Uniswap V3 WBTC-USDC pool</a> on Ethereum. As long as WBTC is still exchangeable for BTC, and USDC is still exchangeable for dollars, and Uniswap V3 is still a protocol that people use, you can assume this is the price people trade bitcoins for dollars on this platform. (If it very different from the bitcoin price, then someone would trade it and make free money. That's why there's only one price.)</p>
<p>You don't have to read it from the info.uniswap.org website - after getting familiar with Ethereum, you could <a href="https://ethereum.stackexchange.com/questions/98685/computing-the-uniswap-v3-pair-price-from-q64-96-number">read it</a> from <a href="https://etherscan.io/address/0x99ac8ca7087fa4a2a1fb6357269965a2014abc35#readContract" rel="nofollow noreferrer">the blockchain</a>. The information is still invisible to the Bitcoin blockchain, but since the <em>Ethereum</em> blockchain is working as a crypto exchange, the information about its trades is available on <em>that</em> blockchain.</p>
 15430: <p>You may be thinking with cause and effect reversed. The Bitcoin price being $300 does <strong>not</strong> cause people to buy and sell at $300. Rather, people buying and selling at $300 causes the price to be $300.</p>

<p>Obviously, there is no way to find out what price people buy and sell bitcoins at without buying or selling bitcoins, or asking someone else who's buying or selling bitcoins, or asking an exchange that bitcoins get bought and sold through.</p>
 26873: <p>The bitcoin price is determined by a free market of buyers and sellers. There is no way to calculate the price on your own without an external source. I suppose the only exception to this would be if you ran your own bitcoin exchange and you had enough users and volume to produce a fair market price.</p>
