diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index b86437ced..f86b09644 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -31,6 +31,7 @@
 #include "macdockiconhandler.h"
 #endif
 
+#include "chainparams.h"
 #include "init.h"
 #include "ui_interface.h"
 #include "util.h"
@@ -752,8 +753,8 @@ void BitcoinGUI::updateHeadersSyncProgressLabel()
 {
     int64_t headersTipTime = clientModel->getHeaderTipTime();
     int headersTipHeight = clientModel->getHeaderTipHeight();
-    int estHeadersLeft = (GetTime() - headersTipTime)/600;
-    if (estHeadersLeft > REQ_HEADER_HEIGHT_DELTA_SYNC)
+    int estHeadersLeft = (GetTime() - headersTipTime) / Params().GetConsensus().nPowTargetSpacing;
+    if (estHeadersLeft > HEADER_HEIGHT_DELTA_SYNC)
         progressBarLabel->setText(tr("Syncing Headers (%1%)...").arg(QString::number(100.0 / (headersTipHeight+estHeadersLeft)*headersTipHeight, 'f', 1)));
 }
 
diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
index 89fb15995..4779ffa43 100644
--- a/src/qt/modaloverlay.cpp
+++ b/src/qt/modaloverlay.cpp
@@ -7,6 +7,8 @@
 
 #include "guiutil.h"
 
+#include "chainparams.h"
+
 #include <QResizeEvent>
 #include <QPropertyAnimation>
 
@@ -125,11 +127,11 @@ void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVeri
 
     // estimate the number of headers left based on nPowTargetSpacing
     // and check if the gui is not aware of the the best header (happens rarely)
-    int estimateNumHeadersLeft = bestHeaderDate.secsTo(currentDate) / 600;
+    int estimateNumHeadersLeft = bestHeaderDate.secsTo(currentDate) / Params().GetConsensus().nPowTargetSpacing;
     bool hasBestHeader = bestHeaderHeight >= count;
 
     // show remaining number of blocks
-    if (estimateNumHeadersLeft < 24 && hasBestHeader) {
+    if (estimateNumHeadersLeft < HEADER_HEIGHT_DELTA_SYNC && hasBestHeader) {
         ui->numberOfBlocksLeft->setText(QString::number(bestHeaderHeight - count));
     } else {
         ui->numberOfBlocksLeft->setText(tr("Unknown. Syncing Headers (%1)...").arg(bestHeaderHeight));
diff --git a/src/qt/modaloverlay.h b/src/qt/modaloverlay.h
index 6d1f12164..21ccdbd83 100644
--- a/src/qt/modaloverlay.h
+++ b/src/qt/modaloverlay.h
@@ -9,7 +9,7 @@
 #include <QWidget>
 
 //! The required delta of headers to the estimated number of available headers until we show the IBD progress
-static const int REQ_HEADER_HEIGHT_DELTA_SYNC = 24;
+static constexpr int HEADER_HEIGHT_DELTA_SYNC = 24;
 
 namespace Ui {
     class ModalOverlay;
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 5aeda7a30..1e2842df7 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -16,6 +16,7 @@
 #include "walletmodel.h"
 
 #include "base58.h"
+#include "chainparams.h"
 #include "wallet/coincontrol.h"
 #include "validation.h" // mempool and minRelayTxFee
 #include "ui_interface.h"
@@ -608,7 +609,7 @@ void SendCoinsDialog::updateGlobalFeeVariables()
         CoinControlDialog::coinControl->nMinimumTotalFee = 0;
 
         // show the estimated reuquired time for confirmation
-        ui->confirmationTargetLabel->setText(GUIUtil::formatDurationStr(nConfirmTarget*600)+" / "+tr("%n block(s)", "", nConfirmTarget));
+        ui->confirmationTargetLabel->setText(GUIUtil::formatDurationStr(nConfirmTarget * Params().GetConsensus().nPowTargetSpacing) + " / " + tr("%n block(s)", "", nConfirmTarget));
     }
     else
     {