diff --git a/internal/formatter/testdata/scientific_notation.scad b/internal/formatter/testdata/scientific_notation.scad
new file mode 100644
index 0000000..b2c151f
--- /dev/null
+++ b/internal/formatter/testdata/scientific_notation.scad
@@ -0,0 +1,16 @@
+/*
+ * Test formatting of floating point numbers
+ */
+a=8.014786;
+b=.014786;
+c=8.014786e+00;
+d=8.014786E+00;
+e=8.014786E-00;
+f=8.014786e-00;
+g=8.014786E00;
+h=8.014786e00;
+i=9.9e-126;
+j=9.e-126;
+k=9e-126;
+l=9e-126;
+m=-9e-126;
diff --git a/internal/formatter/testdata/scientific_notation.scad.expected b/internal/formatter/testdata/scientific_notation.scad.expected
new file mode 100644
index 0000000..2146f6f
--- /dev/null
+++ b/internal/formatter/testdata/scientific_notation.scad.expected
@@ -0,0 +1,16 @@
+/*
+ * Test formatting of floating point numbers
+ */
+a = 8.014786;
+b = .014786;
+c = 8.014786e+00;
+d = 8.014786E+00;
+e = 8.014786E-00;
+f = 8.014786e-00;
+g = 8.014786E00;
+h = 8.014786e00;
+i = 9.9e-126;
+j = 9.e-126;
+k = 9e-126;
+l = 9e-126;
+m = -9e-126;
diff --git a/internal/parser/OpenSCAD.g4 b/internal/parser/OpenSCAD.g4
index e74cf2f..8e9aacd 100644
--- a/internal/parser/OpenSCAD.g4
+++ b/internal/parser/OpenSCAD.g4
@@ -543,10 +543,10 @@ NUMBER
     )
 ;
 
-FLOAT
-:
-    DIGIT* '.' DIGIT+
-;
+FLOAT:
+	DIGIT+ FLOAT_EXPONENT?
+	| DIGIT* '.' DIGIT+ FLOAT_EXPONENT?
+	| DIGIT+ '.' DIGIT* FLOAT_EXPONENT?;
 
 INTEGER
 :
@@ -622,8 +622,13 @@ fragment EOL
     | '\n'
 ;
 
-fragment
-STRING_CHAR
+
+fragment FLOAT_EXPONENT
+:
+  [eE] [+-]? DIGIT+
+;
+
+fragment STRING_CHAR
 :
     ~["\\]
     | ESCAPE_SEQUENCE
@@ -690,6 +695,3 @@ HEX_DIGIT
 :
     [0-9a-fA-F]
 ;
-
-
-