diff --git a/README.md b/README.md
index 577684e..851bf39 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,10 @@ Performs a windowing function on the values array. The possible windowing option
     * FFT_WIN_TYP_HAMMING
     * FFT_WIN_TYP_HANN
     * FFT_WIN_TYP_TRIANGLE
+    * FFT_WIN_TYP_NUTTALL
     * FFT_WIN_TYP_BLACKMAN
+    * FFT_WIN_TYP_BLACKMAN_NUTTALL
+    * FFT_WIN_TYP_BLACKMAN_HARRIS
     * FFT_WIN_TYP_FLT_TOP
     * FFT_WIN_TYP_WELCH
 * **Exponent**(uint16_t value);
diff --git a/keywords.txt b/keywords.txt
index 7c2f303..3a25dd3 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -31,6 +31,9 @@ FFT_WIN_TYP_RECTANGLE	LITERAL1
 FFT_WIN_TYP_HAMMING	LITERAL1
 FFT_WIN_TYP_HANN	LITERAL1
 FFT_WIN_TYP_TRIANGLE	LITERAL1
+FFT_WIN_TYP_NUTTALL	LITERAL1
 FFT_WIN_TYP_BLACKMAN	LITERAL1
+FFT_WIN_TYP_BLACKMAN_NUTTALL	LITERAL1
+FFT_WIN_TYP_BLACKMAN_HARRIS	LITERAL1
 FFT_WIN_TYP_FLT_TOP	LITERAL1
 FFT_WIN_TYP_WELCH	LITERAL1
diff --git a/src/arduinoFFT.cpp b/src/arduinoFFT.cpp
index 37d47d9..c44d4d9 100644
--- a/src/arduinoFFT.cpp
+++ b/src/arduinoFFT.cpp
@@ -199,9 +199,18 @@ void arduinoFFT::Windowing(uint8_t windowType, uint8_t dir)
 		case FFT_WIN_TYP_TRIANGLE: // triangle (Bartlett)
 			weighingFactor = 1.0 - ((2.0 * abs(indexMinusOne - (samplesMinusOne / 2.0))) / samplesMinusOne);
 			break;
-		case FFT_WIN_TYP_BLACKMAN: // blackmann
+		case FFT_WIN_TYP_NUTTALL: // nuttall
+			weighingFactor = 0.355768 - (0.487396 * (cos(twoPi * ratio))) + (0.144232 * (cos(fourPi * ratio))) - (0.012604 * (cos(sixPi * ratio)));
+			break;
+		case FFT_WIN_TYP_BLACKMAN: // blackman
 			weighingFactor = 0.42323 - (0.49755 * (cos(twoPi * ratio))) + (0.07922 * (cos(fourPi * ratio)));
 			break;
+		case FFT_WIN_TYP_BLACKMAN_NUTTALL: // blackman nuttall
+			weighingFactor = 0.3635819 - (0.4891775 * (cos(twoPi * ratio))) + (0.1365995 * (cos(fourPi * ratio))) - (0.0106411 * (cos(sixPi * ratio)));
+			break;
+		case FFT_WIN_TYP_BLACKMAN_HARRIS: // blackman harris
+			weighingFactor = 0.35875 - (0.48829 * (cos(twoPi * ratio))) + (0.14128 * (cos(fourPi * ratio))) - (0.01168 * (cos(sixPi * ratio)));
+			break;
 		case FFT_WIN_TYP_FLT_TOP: // flat top
 			weighingFactor = 0.2810639 - (0.5208972 * cos(twoPi * ratio)) + (0.1980399 * cos(fourPi * ratio));
 			break;
@@ -244,9 +253,18 @@ void arduinoFFT::Windowing(double *vData, uint16_t samples, uint8_t windowType,
 		case FFT_WIN_TYP_TRIANGLE: // triangle (Bartlett)
 			weighingFactor = 1.0 - ((2.0 * abs(indexMinusOne - (samplesMinusOne / 2.0))) / samplesMinusOne);
 			break;
-		case FFT_WIN_TYP_BLACKMAN: // blackmann
+		case FFT_WIN_TYP_NUTTALL: // nuttall
+			weighingFactor = 0.355768 - (0.487396 * (cos(twoPi * ratio))) + (0.144232 * (cos(fourPi * ratio))) - (0.012604 * (cos(sixPi * ratio)));
+			break;
+		case FFT_WIN_TYP_BLACKMAN: // blackman
 			weighingFactor = 0.42323 - (0.49755 * (cos(twoPi * ratio))) + (0.07922 * (cos(fourPi * ratio)));
 			break;
+		case FFT_WIN_TYP_BLACKMAN_NUTTALL: // blackman nuttall
+			weighingFactor = 0.3635819 - (0.4891775 * (cos(twoPi * ratio))) + (0.1365995 * (cos(fourPi * ratio))) - (0.0106411 * (cos(sixPi * ratio)));
+			break;
+		case FFT_WIN_TYP_BLACKMAN_HARRIS: // blackman harris
+			weighingFactor = 0.35875 - (0.48829 * (cos(twoPi * ratio))) + (0.14128 * (cos(fourPi * ratio))) - (0.01168 * (cos(sixPi * ratio)));
+			break;
 		case FFT_WIN_TYP_FLT_TOP: // flat top
 			weighingFactor = 0.2810639 - (0.5208972 * cos(twoPi * ratio)) + (0.1980399 * cos(fourPi * ratio));
 			break;
diff --git a/src/arduinoFFT.h b/src/arduinoFFT.h
index e65eb17..3b8c203 100644
--- a/src/arduinoFFT.h
+++ b/src/arduinoFFT.h
@@ -48,12 +48,16 @@
 #define FFT_WIN_TYP_HAMMING 0x01 /* hamming */
 #define FFT_WIN_TYP_HANN 0x02 /* hann */
 #define FFT_WIN_TYP_TRIANGLE 0x03 /* triangle (Bartlett) */
-#define FFT_WIN_TYP_BLACKMAN 0x04 /* blackmann */
-#define FFT_WIN_TYP_FLT_TOP 0x05 /* flat top */
-#define FFT_WIN_TYP_WELCH 0x06 /* welch */
+#define FFT_WIN_TYP_NUTTALL 0x04 /* nuttall */
+#define FFT_WIN_TYP_BLACKMAN 0x05 /* blackman */
+#define FFT_WIN_TYP_BLACKMAN_NUTTALL 0x06 /* blackman nuttall */
+#define FFT_WIN_TYP_BLACKMAN_HARRIS 0x07 /* blackman harris*/
+#define FFT_WIN_TYP_FLT_TOP 0x08 /* flat top */
+#define FFT_WIN_TYP_WELCH 0x09 /* welch */
 /*Mathematial constants*/
 #define twoPi 6.28318531
 #define fourPi 12.56637061
+#define sixPi 18.84955593
 
 class arduinoFFT {
 public: