diff --git a/jsroot/types/fundamental/README.md b/jsroot/types/fundamental/README.md
index dc98213..9c1e5c3 100644
--- a/jsroot/types/fundamental/README.md
+++ b/jsroot/types/fundamental/README.md
@@ -5,6 +5,3 @@
  * [`real`](real): `Real{16,32,64}`, `SplitReal{32,64}`
  * [`real32trunc`](real32trunc): `Real32Trunc`
  * [`real32quant`](real32quant): `Real32Quant`
-
-Note:
-- the columns of `real32quant` are more precise in JSROOT, since JavaScript natively supports double-precision floats
diff --git a/jsroot/types/fundamental/real32quant/read.mjs b/jsroot/types/fundamental/real32quant/read.mjs
index 74bee6b..0d23ad9 100644
--- a/jsroot/types/fundamental/real32quant/read.mjs
+++ b/jsroot/types/fundamental/real32quant/read.mjs
@@ -1,5 +1,14 @@
 import { read, floatToHex } from "../../../jsroot_reader.mjs";
 
+function formatFloat(num, { field }) {
+  // round num to single-precision float to match the required field precision
+  if (field.startsWith("Float")) {
+    num = Math.fround(num);
+  }
+
+  return floatToHex(num);
+}
+
 const fields = [
   "FloatReal32Quant1",
   "FloatReal32Quant8",
@@ -12,4 +21,4 @@ const fields = [
 const [input = "types.fundamental.real32quant.root", output = "types.fundamental.real32quant.json"] =
   process.argv.slice(2);
 
-read(input, output, fields, floatToHex);
+read(input, output, fields, formatFloat);