diff --git a/frontends/monkey/plot.c b/frontends/monkey/plot.c
--- a/frontends/monkey/plot.c
+++ b/frontends/monkey/plot.c
@@ -20,13 +20,21 @@
 
 #include "utils/utils.h"
 #include "utils/errors.h"
+#include "netsurf/browser.h"
 #include "netsurf/plotters.h"
 
 #include "monkey/output.h"
 #include "monkey/browser.h"
 
 #if defined(__montauk__)
 #include "content/fetchers/montauk_bridge.h"
+
+static int native_font_px(plot_style_fixed point_size)
+{
+	int pixels = (int)(((int64_t)point_size * browser_get_dpi() +
+		36 * PLOT_STYLE_SCALE) / (72 * PLOT_STYLE_SCALE));
+	return pixels > 0 ? pixels : 1;
+}
 
 struct bitmap {
 	void *ptr;
@@ -70,6 +78,6 @@ static void native_text(struct gui_window *gw, int x, int baseline,
 		const char *text, size_t length, const struct plot_font_style *style)
 {
-	int px = plot_style_fixed_to_int(style->size);
+	int px = native_font_px(style->size);
 	if (gw == NULL || gw->pixels == NULL) return;
 	mtk_netsurf_font_draw(gw->pixels, gw->width, gw->height,
 		gw->clip_x0, gw->clip_y0, gw->clip_x1, gw->clip_y1,
diff --git a/frontends/monkey/layout.c b/frontends/monkey/layout.c
--- a/frontends/monkey/layout.c
+++ b/frontends/monkey/layout.c
@@ -25,13 +25,21 @@
 #include <stddef.h>
 
 #include "utils/utf8.h"
+#include "netsurf/browser.h"
 #include "netsurf/plot_style.h"
 #include "netsurf/layout.h"
 
 #include "monkey/layout.h"
 
 #if defined(__montauk__)
 #include "content/fetchers/montauk_bridge.h"
+
+static int native_font_px(plot_style_fixed point_size)
+{
+	int pixels = (int)(((int64_t)point_size * browser_get_dpi() +
+		36 * PLOT_STYLE_SCALE) / (72 * PLOT_STYLE_SCALE));
+	return pixels > 0 ? pixels : 1;
+}
 #endif
 
 static int font_width(const plot_font_style_t *fstyle,
@@ -38,7 +46,7 @@ static int font_width(const plot_font_style_t *fstyle,
 {
 #if defined(__montauk__)
 	return mtk_netsurf_font_width(fstyle->family, fstyle->weight,
-		fstyle->flags, plot_style_fixed_to_int(fstyle->size), string, length);
+		fstyle->flags, native_font_px(fstyle->size), string, length);
 #else
 	return (fstyle->size * utf8_bounded_length(string, length)) / PLOT_STYLE_SCALE;
 #endif