diff --git a/src/Models/ThemeConfig/Conversion/MiscTagRenderingChecks.ts b/src/Models/ThemeConfig/Conversion/MiscTagRenderingChecks.ts
index 32f79c986..f96a3b2e5 100644
--- a/src/Models/ThemeConfig/Conversion/MiscTagRenderingChecks.ts
+++ b/src/Models/ThemeConfig/Conversion/MiscTagRenderingChecks.ts
@@ -215,6 +215,9 @@ export class MiscTagRenderingChecks extends DesugaringStep<TagRenderingConfigJso
                 }
             }
         }
+        if (json["range"]) {
+            context.err("Detected a range in the tagRendering. A `range` goes in the freeform object")
+        }
         if (json.render && json["question"] && json.freeform === undefined) {
             context.err(
                 `Detected a tagrendering which takes input without freeform key in ${context}; the question is ${new Translation(
diff --git a/src/Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson.ts b/src/Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson.ts
index b0aa9cecc..faa57ae93 100644
--- a/src/Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson.ts
+++ b/src/Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson.ts
@@ -1,6 +1,7 @@
 import { TagConfigJson } from "./TagConfigJson"
 import { TagRenderingConfigJson } from "./TagRenderingConfigJson"
 import type { Translatable } from "./Translatable"
+import RewritableConfigJson from "./RewritableConfigJson"
 
 export interface MappingConfigJson {
     /**
@@ -203,7 +204,7 @@ export interface QuestionableTagRenderingConfigJson extends TagRenderingConfigJs
      *
      * question: What are common options?
      */
-    mappings?: MappingConfigJson[]
+    mappings?: MappingConfigJson[] | RewritableConfigJson<MappingConfigJson>
 
     /**
      * question: Should a contributor be allowed to select multiple mappings?
@@ -298,13 +299,17 @@ export interface QuestionableTagRenderingConfigJson extends TagRenderingConfigJs
         helperArgs?: any
 
         /**
-         * question: what units
+         * question: what units/denominations should be shown?
+         *
+         * If this is a string, the corresponding values from "unit.json" will be used, such as
+         * `pressure`, `power`, `speed`, `distance`
+         * See [the generated documentation](Docs/builtin_units.md) for more information
          *
          * group: hidden
          *
          * Note: this is actually a syntactic sugar and is translated to the unit-syntax on layer level
          */
-        unit?: {
+        unit?: string | {
             /**
              * What is the quantity? E.g. 'voltage', 'speed', ...
              * See [builtin_units.md] for options
diff --git a/src/Models/ThemeConfig/TagRenderingConfig.ts b/src/Models/ThemeConfig/TagRenderingConfig.ts
index ff3c0c387..7f101bd26 100644
--- a/src/Models/ThemeConfig/TagRenderingConfig.ts
+++ b/src/Models/ThemeConfig/TagRenderingConfig.ts
@@ -5,10 +5,7 @@ import { TagUtils } from "../../Logic/Tags/TagUtils"
 import { And } from "../../Logic/Tags/And"
 import { Utils } from "../../Utils"
 import { Tag } from "../../Logic/Tags/Tag"
-import {
-    MappingConfigJson,
-    QuestionableTagRenderingConfigJson,
-} from "./Json/QuestionableTagRenderingConfigJson"
+import { MappingConfigJson, QuestionableTagRenderingConfigJson } from "./Json/QuestionableTagRenderingConfigJson"
 import Validators, { ValidatorType } from "../../UI/InputElement/Validators"
 import { TagRenderingConfigJson } from "./Json/TagRenderingConfigJson"
 import { RegexTag } from "../../Logic/Tags/RegexTag"
@@ -822,7 +819,7 @@ export default class TagRenderingConfig {
                     () => currentProperties["_country"]
                 )
                 // In general, we want a space between the amount and the unit
-                freeformValue = formatted + " " + denom.canonical
+                freeformValue = formatted + (denom.addSpace ? " " : "") + denom.canonical
             } else {
                 freeformValue = validator.reformat(
                     freeformValue,
diff --git a/src/Models/UnitUtils.ts b/src/Models/UnitUtils.ts
index 29dd07e41..17bf06cbd 100644
--- a/src/Models/UnitUtils.ts
+++ b/src/Models/UnitUtils.ts
@@ -145,12 +145,7 @@ export class UnitUtils {
         const loaded = this.allUnits.get(name)
         if (loaded === undefined) {
             throw (
-                "No unit with quantity name " +
-                name +
-                " found (at " +
-                ctx +
-                "). Try one of: " +
-                Array.from(this.allUnits.keys()).join(", ")
+                `No unit with quantity name ${name} found (at ${ctx}). Try one of: ${Array.from(this.allUnits.keys()).join(", ")}. Alternatively, use \`{"quantity": "...", "denominations": ["...", "...", ...]}\`, e.g. \`{"quantity": "distance", "denominations":["m","cm"]}\``
             )
         }
         return loaded
diff --git a/src/UI/InputElement/ValidatedInput.svelte b/src/UI/InputElement/ValidatedInput.svelte
index ef817b147..bf5cefc71 100644
--- a/src/UI/InputElement/ValidatedInput.svelte
+++ b/src/UI/InputElement/ValidatedInput.svelte
@@ -14,6 +14,7 @@
   import type { ValueRange } from "../../Models/ThemeConfig/TagRenderingConfig"
   import Translations from "../i18n/Translations"
   import BaseUIElement from "../BaseUIElement"
+  import { Denomination } from "../../Models/Denomination"
 
   export let type: ValidatorType
   export let feedback: UIEventSource<Translation> | undefined = undefined
@@ -91,6 +92,7 @@
     if (!range) {
       return true
     }
+    const currentUnit: Denomination = unit.denominations.find(d => d.canonical === selectedUnit?.data)
     if (typeof canonicalValue === "string") {
       canonicalValue = Number(canonicalValue)
     }
@@ -103,7 +105,11 @@
     if (canonicalValue > range.max) {
       let max: number | string | BaseUIElement = range.max
       if (unit) {
-        max = unit.asHumanLongValue(max, getCountry)
+        if (currentUnit?.factorToCanonical !== undefined) {
+          max = unit.asHumanLongValue(Math.round(max / currentUnit.factorToCanonical) + currentUnit.canonical, getCountry)
+        } else {
+          max = unit.asHumanLongValue(max, getCountry)
+        }
       }
       feedback.set(t.tooHigh.Subs({ max }))
       return false
@@ -111,7 +117,11 @@
     if (canonicalValue < range.min) {
       let min: number | string | BaseUIElement = range.min
       if (unit) {
+        if (currentUnit?.factorToCanonical !== undefined) {
+          min = unit.asHumanLongValue(Math.round(min / currentUnit.factorToCanonical) + currentUnit.canonical, getCountry)
+        } else {
         min = unit.asHumanLongValue(min, getCountry)
+        }
       }
       feedback.set(t.tooLow.Subs({ min }))
       return false