diff --git a/src/scales.d.ts b/src/scales.d.ts
index f3bd753c4a..fd3785b074 100644
--- a/src/scales.d.ts
+++ b/src/scales.d.ts
@@ -435,9 +435,11 @@ export interface ScaleOptions extends ScaleDefaults {
    * y: {transform: (y) => (y) / 1000}
    * ```
    *
-   * See also the **percent** and **interval** shorthand options.
+   * See also the **percent** and **interval** shorthand options. If null, no
+   * transform is applied, including the default transform implied by the
+   * **percent** or **interval** option.
    */
-  transform?: (t: any) => any;
+  transform?: ((t: any) => any) | null;
 
   /**
    * Enforces uniformity for data at regular intervals, such as integer values
diff --git a/test/scales/transform-test.ts b/test/scales/transform-test.ts
new file mode 100644
index 0000000000..ec9f6c24f3
--- /dev/null
+++ b/test/scales/transform-test.ts
@@ -0,0 +1,22 @@
+import * as Plot from "@observablehq/plot";
+import {assert, it} from "vitest";
+
+function cx(plot: SVGSVGElement | HTMLElement): (string | null)[] {
+  return Array.from(plot.querySelectorAll("circle"), (circle) => circle.getAttribute("cx"));
+}
+
+it("a null scale transform disables the transform implied by the interval option", () => {
+  const data = [1.5, 2.5, 3.5];
+  const plain = cx(Plot.dotX(data).plot({x: {domain: [0, 4]}}));
+  const interval = cx(Plot.dotX(data).plot({x: {domain: [0, 4], interval: 1}}));
+  const intervalNull = cx(Plot.dotX(data).plot({x: {domain: [0, 4], interval: 1, transform: null}}));
+  assert.notDeepEqual(interval, plain);
+  assert.deepEqual(intervalNull, plain);
+});
+
+it("a null scale transform disables the transform implied by the percent option", () => {
+  const data = [0.25, 0.5, 0.75];
+  const plain = cx(Plot.dotX(data).plot({x: {domain: [0, 1]}}));
+  const percentNull = cx(Plot.dotX(data).plot({x: {domain: [0, 1], percent: true, transform: null}}));
+  assert.deepEqual(percentNull, plain);
+});