diff --git a/src/components/edit-menu/resize-document/messages.json b/src/components/edit-menu/resize-document/messages.json
index 5169b14..fa27c6e 100644
--- a/src/components/edit-menu/resize-document/messages.json
+++ b/src/components/edit-menu/resize-document/messages.json
@@ -1,8 +1,6 @@
 {
     "en-US": {
         "resizeDocument": "Resize document",
-        "width": "Width",
-        "height": "Height",
         "maintainAspectRatio": "Maintain aspect ratio",
         "save": "Save",
         "cancel": "Cancel"
diff --git a/src/components/edit-menu/resize-document/resize-document.vue b/src/components/edit-menu/resize-document/resize-document.vue
index d9f78ae..bd1f2b3 100644
--- a/src/components/edit-menu/resize-document/resize-document.vue
+++ b/src/components/edit-menu/resize-document/resize-document.vue
@@ -27,15 +27,6 @@
         </template>
         <template #content>
             <div class="form" @keyup.enter="save()">
-                <div class="wrapper input">
-                    <label v-t="'width'"></label>
-                    <input
-                        ref="first"
-                        v-model.number="width"
-                        type="number"
-                        name="width"
-                    />
-                </div>
                 <div class="wrapper input">
                     <label v-t="'maintainAspectRatio'"></label>
                     <toggle-button
@@ -43,14 +34,9 @@
                         name="ratio"
                     />
                 </div>
-                <div class="wrapper input">
-                    <label v-t="'height'"></label>
-                    <input
-                        v-model.number="height"
-                        type="number"
-                        name="height"
-                    />
-                </div>
+                <dimensions-formatter
+                    v-model="dimensions"
+                />
             </div>
         </template>
         <template #actions>
@@ -74,6 +60,7 @@
 import { mapGetters, mapMutations } from "vuex";
 import { ToggleButton } from "vue-js-toggle-button";
 import Modal from "@/components/modal/modal";
+import DimensionsFormatter from "@/components/ui/dimensions-formatter/dimensions-formatter";
 import messages from "./messages.json";
 
 export default {
@@ -81,10 +68,13 @@ export default {
     components: {
         Modal,
         ToggleButton,
+        DimensionsFormatter,
     },
     data: () => ({
-        width: 0,
-        height: 0,
+        dimensions: {
+            width: 0,
+            height: 0,
+        },
         ratio: 0,
         syncLock: false,
         maintainRatio: true,
@@ -93,18 +83,24 @@ export default {
         ...mapGetters([
             "activeDocument",
         ]),
+        width() {
+            return this.dimensions.width;
+        },
+        height() {
+            return this.dimensions.height;
+        },
     },
-    mounted() {
-        this.width  = this.activeDocument.width;
-        this.height = this.activeDocument.height;
-        this.ratio  = this.width / this.height;
+    created() {
+        this.dimensions.width  = this.activeDocument.width;
+        this.dimensions.height = this.activeDocument.height;
+        this.ratio = this.dimensions.width / this.dimensions.height;
 
         this.$watch( "width", function( value ) {
             if ( !this.maintainRatio || this.syncLock ) {
                 return;
             }
             this.lockSync();
-            this.height = Math.round( value / this.ratio );
+            this.dimensions.height = Math.round( value / this.ratio );
         });
 
         this.$watch( "height", function( value ) {
@@ -112,9 +108,8 @@ export default {
                 return;
             }
             this.lockSync();
-            this.width = Math.round( value * this.ratio );
+            this.dimensions.width = Math.round( value * this.ratio );
         });
-        this.$refs.first.focus();
     },
     methods: {
         ...mapMutations([
@@ -129,12 +124,12 @@ export default {
             });
         },
         async save() {
-            const { width, height } = this;
+            const { width, height } = this.dimensions;
             const scaleX = width  / this.activeDocument.width;
             const scaleY = height / this.activeDocument.height;
 
             await this.resizeActiveDocumentContent({ scaleX, scaleY });
-            this.setActiveDocumentSize({ width, height });
+            this.setActiveDocumentSize({ width: Math.round( width ), height: Math.round( height ) });
             this.closeModal();
         },
     }
diff --git a/src/components/file-menu/create-document/create-document.vue b/src/components/file-menu/create-document/create-document.vue
index c6870ba..b2f961f 100644
--- a/src/components/file-menu/create-document/create-document.vue
+++ b/src/components/file-menu/create-document/create-document.vue
@@ -35,22 +35,9 @@
                         name="name"
                     />
                 </div>
-                <div class="wrapper input">
-                    <label v-t="'width'"></label>
-                    <input
-                        v-model.number="width"
-                        type="number"
-                        name="width"
-                    />
-                </div>
-                <div class="wrapper input">
-                    <label v-t="'height'"></label>
-                    <input
-                        v-model.number="height"
-                        type="number"
-                        name="height"
-                    />
-                </div>
+                <dimensions-formatter
+                    v-model="dimensions"
+                />
             </div>
         </template>
         <template #actions>
@@ -74,17 +61,21 @@
 import { mapGetters, mapMutations } from "vuex";
 import Modal from "@/components/modal/modal";
 import DocumentFactory from "@/factories/document-factory";
+import DimensionsFormatter from "@/components/ui/dimensions-formatter/dimensions-formatter";
 import messages from "./messages.json";
 
 export default {
     i18n: { messages },
     components: {
         Modal,
+        DimensionsFormatter,
     },
     data: () => ({
         name   : "",
-        width  : 1000,
-        height : 1000,
+        dimensions: {
+            width: 1000,
+            height: 1000,
+        },
     }),
     computed: {
         ...mapGetters([
@@ -102,9 +93,9 @@ export default {
         ]),
         async save() {
             this.addNewDocument( DocumentFactory.create({
-                name: this.name,
-                width: this.width,
-                height: this.height
+                name   : this.name,
+                width  : Math.round( this.dimensions.width ),
+                height : Math.round( this.dimensions.height ),
             }));
             this.closeModal();
         },
diff --git a/src/components/file-menu/create-document/messages.json b/src/components/file-menu/create-document/messages.json
index 3afb917..e05ce69 100644
--- a/src/components/file-menu/create-document/messages.json
+++ b/src/components/file-menu/create-document/messages.json
@@ -3,8 +3,6 @@
         "newDocument": "New document",
         "newDocumentNum": "New document #{num}",
         "name": "Name",
-        "width": "Width",
-        "height": "Height",
         "create": "Create",
         "cancel": "Cancel"
     }
diff --git a/src/components/ui/dimensions-formatter/dimensions-formatter.vue b/src/components/ui/dimensions-formatter/dimensions-formatter.vue
new file mode 100644
index 0000000..3549ae5
--- /dev/null
+++ b/src/components/ui/dimensions-formatter/dimensions-formatter.vue
@@ -0,0 +1,171 @@
+/**
+* The MIT License (MIT)
+*
+* Igor Zinken 2021 - https://www.igorski.nl
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of
+* this software and associated documentation files (the "Software"), to deal in
+* the Software without restriction, including without limitation the rights to
+* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+* the Software, and to permit persons to whom the Software is furnished to do so,
+* subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all
+* copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+<template>
+    <div>
+        <h3 v-t="'dimensions'" class="title"></h3>
+        <div class="wrapper input">
+            <label v-t="'unit'"></label>
+            <div class="select-combo">
+                <select-box :options="units"
+                             v-model="unit"
+                />
+                <select-box v-if="showDPI"
+                            v-model="dpi"
+                            :options="dpis"
+                />
+            </div>
+        </div>
+        <div class="wrapper input">
+            <label v-t="'width'"></label>
+            <input
+                v-model.number="translatedWidth"
+                type="number"
+                name="width"
+            />
+        </div>
+        <div class="wrapper input">
+            <label v-t="'height'"></label>
+            <input
+                v-model.number="translatedHeight"
+                type="number"
+                name="height"
+            />
+        </div>
+    </div>
+</template>
+
+<script>
+import SelectBox from "@/components/ui/select-box/select-box";
+import { pixelsToInch, pixelsToCm, pixelsToMm, inchesToPixels, cmToPixels, mmToPixels,  } from "@/math/unit-math";
+import messages from "./messages.json";
+
+const DPI   = [ 72, 97, 150, 300, 600, 1200 ];
+const UNITS = [ "px", "in", "cm", "mm" ];
+
+const toFixedFloat = ( value, exp = 2 ) => parseFloat( value.toFixed( exp ));
+
+export default {
+    i18n: { messages },
+    components: {
+        SelectBox,
+    },
+    props: {
+        value: {
+            type: Object,
+            required: true,
+            validator: ({ width, height }) => typeof width === "number" && typeof height === "number"
+        },
+    },
+    data: () => ({
+        unit: UNITS[ 0 ],
+        dpi: DPI[ 0 ].toString(),
+        internalValue: {},
+    }),
+    computed: {
+        showDPI() {
+            return this.unit !== "px";
+        },
+        dpis() {
+            return DPI.map( dpi => ({ text: `${dpi} DPI`, value: dpi.toString() }));
+        },
+        units() {
+            return UNITS.map( unit => ({ text: this.$t( unit ), value: unit }));
+        },
+        translatedWidth: {
+            get() {
+                return this.valueFromPx( this.internalValue.width );
+            },
+            set( value ) {
+                this.internalValue.width = this.valueToPx( value );
+            },
+        },
+        translatedHeight: {
+            get() {
+                return this.valueFromPx( this.internalValue.height );
+            },
+            set( value ) {
+                this.internalValue.height = this.valueToPx( value )
+            },
+        }
+    },
+    mounted() {
+        this.internalValue = { ...this.value };
+    },
+    watch: {
+        internalValue( value ) {
+            this.$emit( "input", value );
+        },
+    },
+    methods: {
+        valueFromPx( valueInPx ) {
+            const dpi = parseFloat( this.dpi );
+            switch ( this.unit ) {
+                default:
+                case "px":
+                    return valueInPx;
+                case "in":
+                    return toFixedFloat( pixelsToInch( valueInPx, dpi ));
+                case "cm":
+                    return toFixedFloat( pixelsToCm( valueInPx, dpi ));
+                case "mm":
+                    return toFixedFloat( pixelsToMm( valueInPx, dpi ));
+            }
+        },
+        valueToPx( value ) {
+            switch ( this.unit ) {
+                default:
+                case "px":
+                    return value;
+                case "in":
+                    return inchesToPixels( value, this.dpi );
+                    break;
+                case "cm":
+                    return cmToPixels( value, this.dpi );
+                    break;
+                case "mm":
+                    return mmToPixels( value, this.dpi );
+                    break;
+            }
+        }
+    }
+};
+</script>
+
+<style lang="scss" scoped>
+@import "@/styles/_variables";
+
+.title {
+    color: #FFF;
+    margin: $spacing-medium 0 $spacing-medium 50%;
+}
+
+.select-combo {
+    display: inline-flex;
+    width: 50%;
+}
+
+.select-combo .select {
+    flex: 1;
+    margin-right: $spacing-small;
+}
+</style>
diff --git a/src/components/ui/dimensions-formatter/messages.json b/src/components/ui/dimensions-formatter/messages.json
new file mode 100644
index 0000000..d80ed54
--- /dev/null
+++ b/src/components/ui/dimensions-formatter/messages.json
@@ -0,0 +1,13 @@
+{
+    "en-US": {
+        "dimensions": "Dimensions",
+        "dpi": "DPI",
+        "width": "Width",
+        "height": "Height",
+        "unit": "Unit",
+        "px": "Pixels",
+        "in": "Inches",
+        "cm": "Centimeters",
+        "mm": "Millimeters"
+    }
+}
diff --git a/src/math/unit-math.js b/src/math/unit-math.js
new file mode 100644
index 0000000..6104c4d
--- /dev/null
+++ b/src/math/unit-math.js
@@ -0,0 +1,31 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Igor Zinken 2021 - https://www.igorski.nl
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+const CM_PER_INCH = 2.54;
+const MM_PER_INCH = CM_PER_INCH * 10;
+
+export const pixelsToInch   = ( pixels, dpi = 72 ) => pixels / dpi;
+export const pixelsToCm     = ( pixels, dpi = 72 ) => pixelsToInch( pixels, dpi ) * CM_PER_INCH
+export const pixelsToMm     = ( pixels, dpi = 72 ) => pixelsToInch( pixels, dpi ) * MM_PER_INCH;
+export const inchesToPixels = ( inches, dpi = 72 ) => inches * dpi;
+export const cmToPixels     = ( cms, dpi = 72 ) => inchesToPixels( cms / CM_PER_INCH );
+export const mmToPixels     = ( mms, dpi = 72 ) => inchesToPixels( mms / MM_PER_INCH );