diff --git a/sc/source/core/tool/interpr3.cxx b/sc/source/core/tool/interpr3.cxx
index 962f61970ee6..f55fc1636959 100644
--- a/sc/source/core/tool/interpr3.cxx
+++ b/sc/source/core/tool/interpr3.cxx
@@ -5096,7 +5096,7 @@ static void lcl_convertToPolar(std::vector<double>& rCmplxArray, double fMinMag)
     {
         fR = rCmplxArray[nIdx];
         fI = rCmplxArray[nPoints+nIdx];
-        fMag = sqrt(fR*fR + fI*fI);
+        fMag = std::hypot(fR, fI);
         if (fMag < fMinMag)
         {
             fMag = 0.0;
diff --git a/scaddins/source/analysis/analysishelper.hxx b/scaddins/source/analysis/analysishelper.hxx
index 093d939301eb..835593518a98 100644
--- a/scaddins/source/analysis/analysishelper.hxx
+++ b/scaddins/source/analysis/analysishelper.hxx
@@ -652,7 +652,7 @@ inline double Complex::Imag() const
 
 inline double Complex::Abs() const
 {
-    return sqrt( r * r + i * i );
+    return std::hypot(r, i);
 }
 
 
diff --git a/svx/source/engine3d/camera3d.cxx b/svx/source/engine3d/camera3d.cxx
index 30a1b09fb36e..135ff9b27a77 100644
--- a/svx/source/engine3d/camera3d.cxx
+++ b/svx/source/engine3d/camera3d.cxx
@@ -108,7 +108,7 @@ void Camera3D::SetBankAngle(double fAngle)
 
     // Rotate on Z axis, to rotate the BankAngle and back
     basegfx::B3DHomMatrix aTf;
-    const double fV(sqrt(aDiff.getY() * aDiff.getY() + aDiff.getZ() * aDiff.getZ()));
+    const double fV(std::hypot(aDiff.getY(), aDiff.getZ()));
 
     if (fV != 0.0)
     {