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Asked: 2026-05-22T02:59:31+00:00

I am trying to format a number as a currency and having problems. I’ve

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I am trying to format a number as a currency and having problems. I’ve tried with both the default locale and a specific one (like below). The number is formatted in scientific notation nonetheless.

QLocale::setDefault( QLocale(QLocale::English, QLocale::UnitedStates) );
reportCost->setText( QString("$%L1").arg( cost ) );

The trouble is that as soon as I hit millions I get numbers like $1.6473e6 rather than $1,647,312. How can I fix this?

Also,is there really no way to format a currency at all in Qt, like positioning the symbol and proper negative representation?

I cannot test on Windows right now so I don’t know if this is Linux specific.

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1 Answer

  1. Editorial Team

    Unfortunately, the current implementation of QLocale falls short in a lot of these areas. See “QLocale: It’s about time (and dates, and languages, and …)” for an explanation of where this is headed in the future.

    For now, a quick-and-dirty solution would be:

    QString("$%L1").arg(amt, 0, 'f', 2);

    If you need real localization, the ICU libraries might be helpful.

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