diff --git a/docs/reference-1.4.0.html b/docs/reference-1.4.0.html
index 076944a6f17..cec341bf242 100644
--- a/docs/reference-1.4.0.html
+++ b/docs/reference-1.4.0.html
@@ -2543,7 +2543,7 @@ <h3 id='marker-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='marker-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the marker (as a GeoJSON <a href="#point"><code>Point</code></a> Feature).</p>
 </td>
@@ -8702,7 +8702,7 @@ <h3 id='polyline-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='polyline-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the polyline (as a GeoJSON <code>LineString</code> or <code>MultiLineString</code> Feature).</p>
 </td>
@@ -9568,7 +9568,7 @@ <h3 id='polygon-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='polygon-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the polygon (as a GeoJSON <a href="#polygon"><code>Polygon</code></a> or <code>MultiPolygon</code> Feature).</p>
 </td>
@@ -10464,7 +10464,7 @@ <h3 id='rectangle-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='rectangle-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the polygon (as a GeoJSON <a href="#polygon"><code>Polygon</code></a> or <code>MultiPolygon</code> Feature).</p>
 </td>
@@ -11361,7 +11361,7 @@ <h3 id='circle-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='circle-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the circle marker (as a GeoJSON <a href="#point"><code>Point</code></a> Feature).</p>
 </td>
@@ -12143,7 +12143,7 @@ <h3 id='circlemarker-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='circlemarker-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the circle marker (as a GeoJSON <a href="#point"><code>Point</code></a> Feature).</p>
 </td>
@@ -13922,7 +13922,7 @@ <h3 id='layergroup-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='layergroup-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the layer group (as a GeoJSON <code>FeatureCollection</code>, <code>GeometryCollection</code>, or <code>MultiPoint</code>).</p>
 </td>
@@ -14597,7 +14597,7 @@ <h3 id='featuregroup-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='featuregroup-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the layer group (as a GeoJSON <code>FeatureCollection</code>, <code>GeometryCollection</code>, or <code>MultiPoint</code>).</p>
 </td>
@@ -15381,7 +15381,7 @@ <h3 id='geojson-method'>Methods</h3>
 	</tr>
 	</thead><tbody>
 	<tr id='geojson-togeojson'>
-		<td><code><b>toGeoJSON</b>()</nobr></code></td>
+		<td><code><b>toGeoJSON</b>(<nobr>&lt;Number&gt;</nobr> <i>precision</i>)</nobr></code></td>
 		<td><code>Object</code></td>
 		<td><p>Returns a <a href="http://en.wikipedia.org/wiki/GeoJSON"><a href="#geojson"><code>GeoJSON</code></a></a> representation of the layer group (as a GeoJSON <code>FeatureCollection</code>, <code>GeometryCollection</code>, or <code>MultiPoint</code>).</p>
 </td>
diff --git a/spec/suites/core/UtilSpec.js b/spec/suites/core/UtilSpec.js
index 979dcdca605..fdc70687d04 100644
--- a/spec/suites/core/UtilSpec.js
+++ b/spec/suites/core/UtilSpec.js
@@ -86,6 +86,9 @@ describe('Util', function () {
 			expect(L.Util.formatNum(13.12325555, 3)).to.eql(13.123);
 			expect(L.Util.formatNum(13.12325555)).to.eql(13.123256);
 			expect(L.Util.formatNum(13.12325555, 0)).to.eql(13);
+			expect(L.Util.formatNum(1.005, 2)).to.eql(1.01);
+			expect(L.Util.formatNum(1.555, 2)).to.eql(1.56);
+			expect(L.Util.formatNum(-1.4837191022531273, 18)).to.eql(-1.4837191022531273);
 		});
 	});
 
diff --git a/spec/suites/layer/GeoJSONSpec.js b/spec/suites/layer/GeoJSONSpec.js
index 944e9edc522..429f5390a25 100644
--- a/spec/suites/layer/GeoJSONSpec.js
+++ b/spec/suites/layer/GeoJSONSpec.js
@@ -80,6 +80,12 @@ describe("L.Marker#toGeoJSON", function () {
 			type: 'Point',
 			coordinates: [20.123, 10.123, 30.123]
 		});
+
+		marker = new L.Marker({lng: -1.4837191022531273, lat: 43.49222084042808});
+		expect(marker.toGeoJSON(18).geometry).to.eql({
+			type: 'Point',
+			coordinates: [-1.4837191022531273, 43.49222084042808]
+		});
 	});
 });
 
diff --git a/src/core/Util.js b/src/core/Util.js
index f3d22ece0c5..9399c86e7e8 100644
--- a/src/core/Util.js
+++ b/src/core/Util.js
@@ -114,8 +114,8 @@ export function falseFn() { return false; }
 // @function formatNum(num: Number, digits?: Number): Number
 // Returns the number `num` rounded to `digits` decimals, or to 6 decimals by default.
 export function formatNum(num, digits) {
-	var pow = Math.pow(10, (digits === undefined ? 6 : digits));
-	return Math.round(num * pow) / pow;
+	digits = (digits === undefined ? 6 : digits);
+	return +(Math.round(num + ('e+' + digits)) + ('e-' + digits));
 }
 
 // @function trim(str: String): String