diff --git a/src/formats/bitplane.c b/src/formats/bitplane.c
index 6d13db6..1760cac 100644
--- a/src/formats/bitplane.c
+++ b/src/formats/bitplane.c
@@ -6,16 +6,7 @@
 buffer_t *bitplane_convert(image_t *const image, const unsigned int depth) {
 	if (image->width % 8 != 0) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int j = 0; j < depth; j++) {
-		for (unsigned int y = 0; y < image->height; y++) {
-			for (unsigned int x = 0; x < image->width; x += 8) {
-				buffer_size++;
-			}
-		}
-	}
-
+	unsigned int buffer_size = depth * image->height * ((image->width + (8 - 1)) >> 3);
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -38,16 +29,7 @@ buffer_t *bitplane_convert(image_t *const image, const unsigned int depth) {
 buffer_t *bitplane_convert_interleaved(image_t *const image, const unsigned int depth) {
 	if (image->width % 8 != 0) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int y = 0; y < image->height; y++) {
-		for (unsigned int j = 0; j < depth; j++) {
-			for (unsigned int x = 0; x < image->width; x += 8) {
-				buffer_size++;
-			}
-		}
-	}
-
+	unsigned int buffer_size = image->height * depth * ((image->width + (8 - 1)) >> 3);
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
diff --git a/src/formats/chunky.c b/src/formats/chunky.c
index 717fcde..c576f2d 100644
--- a/src/formats/chunky.c
+++ b/src/formats/chunky.c
@@ -4,18 +4,11 @@
 #include "../image.h"
 
 buffer_t *chunky_convert(image_t *const image) {
-	unsigned int size = image->bitmap->size;
-
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < size; i++) {
-		buffer_size++;
-	}
-
+	unsigned int buffer_size = image->bitmap->size;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
-	for (unsigned int i = 0; i < size; i++) {
+	for (unsigned int i = 0; i < buffer_size; i++) {
 		unsigned char c = buffer_get_byte(image->bitmap, i);
 		buffer_set_byte(buffer, i, c);
 	}
diff --git a/src/formats/palette.c b/src/formats/palette.c
index c5a6004..e622f2d 100644
--- a/src/formats/palette.c
+++ b/src/formats/palette.c
@@ -8,13 +8,7 @@
 buffer_t *palette_convert_pal4(image_t *const image, const unsigned int colors) {
 	if (colors < 1 || colors > 256) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < colors * 4; i += 4) {
-		buffer_size++;
-		buffer_size++;
-	}
-
+	unsigned int buffer_size = (((colors * 4) + (4 - 1)) >> 2) * 2;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -44,15 +38,7 @@ buffer_t *palette_convert_pal4(image_t *const image, const unsigned int colors)
 buffer_t *palette_convert_pal4_copper(image_t *const image, const unsigned int colors) {
 	if (colors < 1 || colors > 32) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < colors * 4; i += 4) {
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-	}
-
+	unsigned int buffer_size = (((colors * 4) + (4 - 1)) >> 2) * 4;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -85,15 +71,7 @@ buffer_t *palette_convert_pal4_copper(image_t *const image, const unsigned int c
 buffer_t *palette_convert_pal8(image_t *const image, const unsigned int colors) {
 	if (colors < 1 || colors > 256) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < colors * 4; i += 4) {
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-	}
-
+	unsigned int buffer_size = (((colors * 4) + (4 - 1)) >> 2) * 4;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -117,36 +95,12 @@ buffer_t *palette_convert_pal8_copper(image_t *const image, const unsigned int c
 
 	// Calculate needed buffer size
 	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < colors; i += 32) {
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-
-		for (unsigned int h = 0; h < 32; h++) { // High
-			if ((i + h) >= colors) { break; }
-
-			buffer_size++;
-			buffer_size++;
-			buffer_size++;
-			buffer_size++;
-		}
-
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-		buffer_size++;
-
-		for (unsigned int l = 0; l < 32; l++) { // Low
-			if ((i + l) >= colors) { break; }
-
-			buffer_size++;
-			buffer_size++;
-			buffer_size++;
-			buffer_size++;
+	for (unsigned int  i = 0; i < colors; i += 32, buffer_size += 8) {
+		for (unsigned int  j = 0; j < 32; j++) {
+			if ((i + j) >= colors) { break; }
+			buffer_size += 8;
 		}
 	}
-
 	buffer_t *buffer = buffer_create(buffer_size);
 
 	unsigned int j = 0;
@@ -204,22 +158,7 @@ buffer_t *palette_convert_pal8_copper(image_t *const image, const unsigned int c
 buffer_t *palette_convert_pal32(image_t *const image, const unsigned int colors) {
 	if (colors < 1 || colors > 256) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	for (unsigned int i = 0; i < colors * 4; i += 4) {
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-	}
-
+	unsigned int buffer_size = (((colors * 4) + (4 - 1)) >> 2) * 4 * 3;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -248,31 +187,7 @@ buffer_t *palette_convert_pal32(image_t *const image, const unsigned int colors)
 buffer_t *palette_convert_loadrgb32(image_t *const image, const unsigned int colors) {
 	if (colors < 1 || colors > 256) { return NULL; }
 
-	// Calculate needed buffer size
-	unsigned int buffer_size = 0;
-	buffer_size++;
-	buffer_size++;
-	buffer_size++;
-	buffer_size++;
-	for (unsigned int i = 0; i < colors * 4; i += 4) {
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-
-		for (unsigned int k = 0; k < 4; k++) {
-			buffer_size++;
-		}
-	}
-	buffer_size++;
-	buffer_size++;
-	buffer_size++;
-	buffer_size++;
-
-
+	unsigned int buffer_size = ((((colors * 4) + (4 - 1)) >> 2) * 4 * 3) + 8;
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
diff --git a/src/formats/sprite.c b/src/formats/sprite.c
index dd73c42..b0eb5ae 100644
--- a/src/formats/sprite.c
+++ b/src/formats/sprite.c
@@ -10,28 +10,10 @@ buffer_t *sprite_convert(image_t *const image, const unsigned int width, const b
 
 	// Calculate needed buffer size
 	unsigned int buffer_size = 0;
-	for (unsigned int x = 0; x < image->width; x += width) {
-		if (controlword) {
-			for (unsigned int i = 0; i < width >> 2; i++) {
-				buffer_size++;
-			}
-		}
-		for (unsigned int y = 0; y < image->height; y++) {
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-		}
-		if (controlword) {
-			for (unsigned int i = 0; i < width >> 2; i++) {
-				buffer_size++;
-			}
-		}
+	for (unsigned int i = 0; i < image->width; i += width) {
+		if (controlword) { buffer_size += (width >> 2) * 2; }
+		buffer_size += image->height * (((width + (8 - 1)) >> 3) * 2);
 	}
-
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }
 
@@ -75,43 +57,10 @@ buffer_t *sprite_convert_attached(image_t *const image, const unsigned int width
 
 	// Calculate needed buffer size
 	unsigned int buffer_size = 0;
-	for (unsigned int x = 0; x < image->width; x += width) {
-		if (controlword) {
-			for (unsigned int i = 0; i < width >> 2; i++) {
-				buffer_size++;
-			}
-		}
-		for (unsigned int y = 0; y < image->height; y++) {
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-		}
-		if (controlword) {
-			for (unsigned int i = 0; i < width >> 2; i++) {
-				buffer_size++;
-				buffer_size++;
-			}
-		}
-		for (unsigned int y = 0; y < image->height; y++) {
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-
-			for (unsigned int i = 0; i < width; i += 8) {
-				buffer_size++;
-			}
-		}
-		if (controlword) {
-			for (unsigned int i = 0; i < width >> 2; i++) {
-				buffer_size++;
-			}
-		}
+	for (unsigned int i = 0; i < image->width; i += width) {
+		if (controlword) { buffer_size += (width >> 2) * 4; }
+		buffer_size += image->height * (((width + (8 - 1)) >> 3) * 4);
 	}
-
 	buffer_t *buffer = buffer_create(buffer_size);
 	if (!buffer) { return NULL; }