“Available Commitment” 可以翻译为：“可用承诺额”或 “可动用承诺额”，常用来指贷款人基于授信所能动用的具体数额。

以下是我找到了一例含有这一术语的翻译实例，在该实例中，译者把“Available Commitment”翻译为“可动用承诺额”。具体摘录此处供参考：

The Borrower shall pay to the Agent for the account of each Lender a fee computed and accruing on a daily basis, at the rate of 5 per cent. per annum on that Lender's Available Commitment at close of business on each day of the Availability Period (or, if any such day shall not be a Business Day, at such close of business on the immediately preceding Business

Day).

借款人应向代理行（为每一贷款人代收）支付在下列计费基础上以年利率 5%按日累计计算的费用，计费基准为该贷款人于授信适用的提款期内每一日营业结束时（若该日不是营业日，则之前一个营业日）的该贷款人在授信项下可动用承诺额。