diff --git a/internal/converter/converter.go b/internal/converter/converter.go
index c45d791..0a2be5f 100644
--- a/internal/converter/converter.go
+++ b/internal/converter/converter.go
@@ -113,7 +113,7 @@ func (c *Converter) InitParse() {
 	c.AddIntParam(&c.Options.CropRatioUp, "crop-ratio-up", c.Options.CropRatioUp, "Crop ratio up: ratio of pixels allow to be non blank while cutting on the top.")
 	c.AddIntParam(&c.Options.CropRatioRight, "crop-ratio-right", c.Options.CropRatioRight, "Crop ratio right: ratio of pixels allow to be non blank while cutting on the right.")
 	c.AddIntParam(&c.Options.CropRatioBottom, "crop-ratio-bottom", c.Options.CropRatioBottom, "Crop ratio bottom: ratio of pixels allow to be non blank while cutting on the bottom.")
-	c.AddIntParam(&c.Options.CropLimit, "crop-limit", c.Options.CropLimit, "Crop limit: maximum number of pixel to crop on all side. 0 mean unlimited.")
+	c.AddIntParam(&c.Options.CropLimit, "crop-limit", c.Options.CropLimit, "Crop limit: maximum number of cropping in percentage allowed. 0 mean unlimited.")
 	c.AddIntParam(&c.Options.Brightness, "brightness", c.Options.Brightness, "Brightness readjustment: between -100 and 100, > 0 lighter, < 0 darker")
 	c.AddIntParam(&c.Options.Contrast, "contrast", c.Options.Contrast, "Contrast readjustment: between -100 and 100, > 0 more contrast, < 0 less contrast")
 	c.AddBoolParam(&c.Options.AutoContrast, "autocontrast", c.Options.AutoContrast, "Improve contrast automatically")
diff --git a/internal/converter/options/converter_options.go b/internal/converter/options/converter_options.go
index 9e18f17..e4d8772 100644
--- a/internal/converter/options/converter_options.go
+++ b/internal/converter/options/converter_options.go
@@ -268,7 +268,7 @@ func (o *Options) ShowConfig() string {
 		{"Grayscale", o.Grayscale, true},
 		{"Grayscale mode", grayscaleMode, o.Grayscale},
 		{"Crop", o.Crop, true},
-		{"Crop ratio", fmt.Sprintf("%d Left - %d Up - %d Right - %d Bottom - %d Limit", o.CropRatioLeft, o.CropRatioUp, o.CropRatioRight, o.CropRatioBottom, o.CropLimit), o.Crop},
+		{"Crop ratio", fmt.Sprintf("%d Left - %d Up - %d Right - %d Bottom - %d%% Limit", o.CropRatioLeft, o.CropRatioUp, o.CropRatioRight, o.CropRatioBottom, o.CropLimit), o.Crop},
 		{"Brightness", o.Brightness, o.Brightness != 0},
 		{"Contrast", o.Contrast, o.Contrast != 0},
 		{"Auto contrast", o.AutoContrast, true},
diff --git a/internal/epub/imagefilters/epub_image_filters_autocrop.go b/internal/epub/imagefilters/epub_image_filters_autocrop.go
index 8d48de2..53abf0a 100644
--- a/internal/epub/imagefilters/epub_image_filters_autocrop.go
+++ b/internal/epub/imagefilters/epub_image_filters_autocrop.go
@@ -28,8 +28,10 @@ type cutRatioOptions struct {
 func findMargin(img image.Image, bounds image.Rectangle, cutRatio cutRatioOptions, limit int) image.Rectangle {
 	imgArea := bounds
 
+	maxCutX, maxCutY := imgArea.Dx()*limit/100, imgArea.Dy()*limit/100
+
 LEFT:
-	for x, maxCut := imgArea.Min.X, limit; x < imgArea.Max.X && (limit == 0 || maxCut > 0); x, maxCut = x+1, maxCut-1 {
+	for x, maxCut := imgArea.Min.X, maxCutX; x < imgArea.Max.X && (maxCutX == 0 || maxCut > 0); x, maxCut = x+1, maxCut-1 {
 		allowNonBlank := imgArea.Dy() * cutRatio.Left / 100
 		for y := imgArea.Min.Y; y < imgArea.Max.Y; y++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -43,7 +45,7 @@ LEFT:
 	}
 
 UP:
-	for y, maxCut := imgArea.Min.Y, limit; y < imgArea.Max.Y && (limit == 0 || maxCut > 0); y, maxCut = y+1, maxCut-1 {
+	for y, maxCut := imgArea.Min.Y, maxCutY; y < imgArea.Max.Y && (maxCutY == 0 || maxCut > 0); y, maxCut = y+1, maxCut-1 {
 		allowNonBlank := imgArea.Dx() * cutRatio.Up / 100
 		for x := imgArea.Min.X; x < imgArea.Max.X; x++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -57,7 +59,7 @@ UP:
 	}
 
 RIGHT:
-	for x, maxCut := imgArea.Max.X-1, limit; x >= imgArea.Min.X && (limit == 0 || maxCut > 0); x, maxCut = x-1, maxCut-1 {
+	for x, maxCut := imgArea.Max.X-1, maxCutX; x >= imgArea.Min.X && (maxCutX == 0 || maxCut > 0); x, maxCut = x-1, maxCut-1 {
 		allowNonBlank := imgArea.Dy() * cutRatio.Right / 100
 		for y := imgArea.Min.Y; y < imgArea.Max.Y; y++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -71,7 +73,7 @@ RIGHT:
 	}
 
 BOTTOM:
-	for y, maxCut := imgArea.Max.Y-1, limit; y >= imgArea.Min.Y && (limit == 0 || maxCut > 0); y, maxCut = y-1, maxCut-1 {
+	for y, maxCut := imgArea.Max.Y-1, maxCutY; y >= imgArea.Min.Y && (maxCutY == 0 || maxCut > 0); y, maxCut = y-1, maxCut-1 {
 		allowNonBlank := imgArea.Dx() * cutRatio.Bottom / 100
 		for x := imgArea.Min.X; x < imgArea.Max.X; x++ {
 			if !colorIsBlank(img.At(x, y)) {