微信转账一次是可以转2万的。
具体操作步骤如下：
1、进入与好友的聊天页面后，点击页面右下角的“+”，然后单击“转账”选项。
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2、在“转账给朋友”页面输入要转账的金额，然后点击下方的“转账”。日最大转账金额为2万。
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3、在弹出的“支付”框中，选择用于付款的方式，然后点击此框内的“确认支付”。
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4、然后转账就完成了，此时点击此页面的“完成”选项就可返回。
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