diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 0e712062af..76500a4a36 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -984,10 +984,11 @@ void RPCConsole::setMempoolSize(long numberOfTxs, size_t dynUsage)
 {
     ui->mempoolNumberTxs->setText(QString::number(numberOfTxs));
 
-    if (dynUsage < 1000000)
-        ui->mempoolSize->setText(QString::number(dynUsage/1000.0, 'f', 2) + " KB");
-    else
-        ui->mempoolSize->setText(QString::number(dynUsage/1000000.0, 'f', 2) + " MB");
+    if (dynUsage < 1000000) {
+        ui->mempoolSize->setText(QObject::tr("%1 kB").arg(dynUsage / 1000.0, 0, 'f', 2));
+    } else {
+        ui->mempoolSize->setText(QObject::tr("%1 MB").arg(dynUsage / 1000000.0, 0, 'f', 2));
+    }
 }
 
 void RPCConsole::on_lineEdit_returnPressed()