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<title>Wei / Gwei / Ether, Sats / BTC, Lamports / SOL unit converter | Blockchain Lab Tools</title><meta name="description" content="Exact big-number conversion between wei, gwei, ether, satoshis, BTC, lamports and SOL — no floating point errors."><link rel="canonical" href="https://blockchains.github.io/blockchainlab-tools/units/">

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<main class="wrap"><h1>Unit converter</h1><p class="mut">Exact integer maths (BigInt via ethers.js). Type a value and pick its unit.</p>

<div class="card"><div class="row"><div><label>Value</label><input id="v" value="1"></div><div><label>Unit</label><select id="u"><option>wei</option><option selected>gwei</option><option>ether</option><option>kwei</option><option>mwei</option><option>szabo</option><option>finney</option><option>sat</option><option>btc</option><option>lamport</option><option>sol</option></select></div></div><button id="go">Convert</button></div><div id="out" class="card"></div>

<div class="card mut">Learn more on Blockchain Lab: <a href="https://blockchainlab.com/learn/fundamentals?utm_source=blockchainlab-tools&utm_medium=tool&utm_campaign=units">Fundamentals</a> · <a href="https://blockchainlab.com/learn/concepts/wallet?utm_source=blockchainlab-tools&utm_medium=tool&utm_campaign=units">Wallets</a> · <a href="https://blockchainlab.com/learn/glossary?utm_source=blockchainlab-tools&utm_medium=tool&utm_campaign=units">Glossary</a></div></main>

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<script type="module">

import * as C from "../assets/core.js"; import { $, esc, params, busy, fail, kv, table, json, on } from "../assets/ui.js";

function run(){ const out=$("#out"); try { const r=C.convertUnits($("#v").value,$("#u").value); out.innerHTML=kv(Object.fromEntries(Object.entries(r).map(([k,v])=>[k==="_hex"?"hex (base unit)":k,esc(v)]))); } catch(e){ fail(out,e); } }

if(params.get("v")) $("#v").value=params.get("v"); if(params.get("u")) $("#u").value=params.get("u");

on("go",run); $("#v").oninput=run; $("#u").onchange=run; run();

</script></body></html>