Convert Bitcoin transaction weight units (WU) to virtual size (vbytes), with exact rounding.
Weight-based virtual size = ceiling(weight ÷ 4). For example, 561 WU becomes 141 vB. This does not calculate signature-operation-adjusted mempool policy size or a confirmation estimate.
Calculated in your browser. Tool input is not sent to our API or stored by this tool. Never paste a private key or seed phrase.