diff --git a/public/js/calculators.js b/public/js/calculators.js
index 952e585..71601fa 100644
--- a/public/js/calculators.js
+++ b/public/js/calculators.js
@@ -1576,14 +1576,10 @@
     // High-intermediate: 75th-95th
     // Low-intermediate: 40th-75th
     // Low-risk: < 40th
-    // Bhutani 1999 hour-specific nomogram — values from PediTools
-    // (MIT-licensed implementation of the original paper). 6-hour
-    // granularity to reduce interpolation error between table points.
-    // Source: Bhutani VK et al., Pediatrics 1999;103(1):6-14.
     var bhutaniZones = {
-      p95: { 12:5.2,  18:6.5,  24:7.9,  30:9.8,  36:11.5, 42:12.4, 48:12.9, 54:13.4, 60:13.8, 66:14.2, 72:14.6, 78:14.9, 84:15.3, 90:15.5, 96:15.8, 108:16.3, 120:16.8, 132:17.2, 144:17.5 },
-      p75: { 12:3.9,  18:5.0,  24:6.4,  30:7.7,  36:9.5,  42:10.4, 48:11.0, 54:11.5, 60:12.0, 66:12.4, 72:12.8, 78:13.2, 84:13.5, 90:13.8, 96:14.0, 108:14.3, 120:14.4, 132:14.5, 144:14.6 },
-      p40: { 12:2.6,  18:3.7,  24:4.6,  30:5.7,  36:7.0,  42:7.8,  48:8.4,  54:9.0,  60:9.5,  66:9.9,  72:10.3, 78:10.6, 84:10.9, 90:11.1, 96:11.2, 108:11.5, 120:11.8, 132:12.0, 144:12.2 }
+      p95: { 24:8.0, 36:10.5, 48:12.5, 60:14.0, 72:15.0, 84:15.5, 96:16.5, 108:17.5, 120:18.0, 132:18.5, 144:19.0 },
+      p75: { 24:6.0, 36:8.5, 48:10.5, 60:12.0, 72:13.0, 84:13.5, 96:14.0, 108:14.5, 120:15.0, 132:15.5, 144:15.5 },
+      p40: { 24:4.5, 36:6.5, 48:8.5, 60:10.0, 72:11.0, 84:11.5, 96:12.0, 108:12.0, 120:12.5, 132:12.5, 144:12.5 }
     };
 
     document.getElementById('btn-calc-bhutani').addEventListener('click', function() {