diff --git a/apps/www/components/PricingCalculator/stages/Stage1ProjectBasics.tsx b/apps/www/components/PricingCalculator/stages/Stage1ProjectBasics.tsx
index 987f11de270..5c47a2f48fe 100644
--- a/apps/www/components/PricingCalculator/stages/Stage1ProjectBasics.tsx
+++ b/apps/www/components/PricingCalculator/stages/Stage1ProjectBasics.tsx
@@ -31,8 +31,10 @@ export default function Stage1ProjectBasics({
             type="number"
             size="small"
             layout="vertical"
-            value={String(inputs.projects)}
-            onChange={(e: any) => set({ projects: Math.max(1, Number(e.target.value || 1)) })}
+            min={1}
+            value={inputs.projects}
+            onChange={(e: any) => set({ projects: Number(e.target.value) || 0 })}
+            onBlur={() => set({ projects: Math.max(1, inputs.projects) })}
           />
           <p className="text-foreground-lighter text-xs">Most users need 1–3 (dev/staging/prod).</p>
         </Panel>
@@ -63,8 +65,10 @@ export default function Stage1ProjectBasics({
             type="number"
             size="small"
             layout="vertical"
-            value={String(inputs.teamSize)}
-            onChange={(e: any) => set({ teamSize: Math.max(1, Number(e.target.value || 1)) })}
+            min={1}
+            value={inputs.teamSize}
+            onChange={(e: any) => set({ teamSize: Number(e.target.value) || 0 })}
+            onBlur={() => set({ teamSize: Math.max(1, inputs.teamSize) })}
           />
           <p className="text-foreground-lighter text-xs">Developers working on backend/infrastructure.</p>
         </Panel>
@@ -75,8 +79,10 @@ export default function Stage1ProjectBasics({
             type="number"
             size="small"
             layout="vertical"
-            value={String(inputs.hourlyCostUsd)}
-            onChange={(e: any) => set({ hourlyCostUsd: Math.max(0, Number(e.target.value || 0)) })}
+            min={0}
+            value={inputs.hourlyCostUsd}
+            onChange={(e: any) => set({ hourlyCostUsd: Number(e.target.value) || 0 })}
+            onBlur={() => set({ hourlyCostUsd: Math.max(0, inputs.hourlyCostUsd) })}
           />
           <p className="text-foreground-lighter text-xs">Default $150/hour (US). Used for time savings.</p>
         </Panel>
diff --git a/apps/www/components/PricingCalculator/stages/Stage2UsageEstimation.tsx b/apps/www/components/PricingCalculator/stages/Stage2UsageEstimation.tsx
index e2dae220981..8a6d8665262 100644
--- a/apps/www/components/PricingCalculator/stages/Stage2UsageEstimation.tsx
+++ b/apps/www/components/PricingCalculator/stages/Stage2UsageEstimation.tsx
@@ -159,10 +159,10 @@ export default function Stage2UsageEstimation({
                     type="number"
                     size="small"
                     layout="vertical"
-                    value={String(inputs.databaseSizeGb)}
-                    onChange={(e: any) =>
-                      set({ databaseSizeGb: clamp(Number(e.target.value || 0.5), 0.5, 10_000) })
-                    }
+                    min={0.5}
+                    value={inputs.databaseSizeGb}
+                    onChange={(e: any) => set({ databaseSizeGb: Number(e.target.value) || 0 })}
+                    onBlur={() => set({ databaseSizeGb: clamp(inputs.databaseSizeGb, 0.5, 10_000) })}
                     className="max-w-[120px]"
                   />
                 </div>
@@ -292,11 +292,11 @@ export default function Stage2UsageEstimation({
                             type="number"
                             size="small"
                             layout="vertical"
-                            value={String(inputs.readReplicas)}
-                            onChange={(e: any) =>
-                              set({
-                                readReplicas: clamp(Math.round(Number(e.target.value || 0)), 0, 10),
-                              })
+                            min={0}
+                            value={inputs.readReplicas}
+                            onChange={(e: any) => set({ readReplicas: Number(e.target.value) || 0 })}
+                            onBlur={() =>
+                              set({ readReplicas: clamp(Math.round(inputs.readReplicas), 0, 10) })
                             }
                             className="w-20 shrink-0"
                           />
@@ -317,11 +317,15 @@ export default function Stage2UsageEstimation({
                             type="number"
                             size="small"
                             layout="vertical"
-                            value={String(inputs.branchingHoursPerMonth)}
+                            min={0}
+                            value={inputs.branchingHoursPerMonth}
                             onChange={(e: any) =>
+                              set({ branchingHoursPerMonth: Number(e.target.value) || 0 })
+                            }
+                            onBlur={() =>
                               set({
                                 branchingHoursPerMonth: clamp(
-                                  Math.round(Number(e.target.value || 0)),
+                                  Math.round(inputs.branchingHoursPerMonth),
                                   0,
                                   10000
                                 ),
@@ -391,10 +395,10 @@ export default function Stage2UsageEstimation({
                     type="number"
                     size="small"
                     layout="vertical"
-                    value={String(inputs.storageSizeGb)}
-                    onChange={(e: any) =>
-                      set({ storageSizeGb: clamp(Number(e.target.value || 0), 0, 100_000) })
-                    }
+                    min={0}
+                    value={inputs.storageSizeGb}
+                    onChange={(e: any) => set({ storageSizeGb: Number(e.target.value) || 0 })}
+                    onBlur={() => set({ storageSizeGb: clamp(inputs.storageSizeGb, 0, 100_000) })}
                     className="max-w-[120px]"
                   />
                 </div>
@@ -435,10 +439,10 @@ export default function Stage2UsageEstimation({
                       type="number"
                       size="small"
                       layout="vertical"
-                      value={String(inputs.mau)}
-                      onChange={(e: any) =>
-                        set({ mau: clamp(Math.round(Number(e.target.value || 0)), 0, 50_000_000) })
-                      }
+                      min={0}
+                      value={inputs.mau}
+                      onChange={(e: any) => set({ mau: Number(e.target.value) || 0 })}
+                      onBlur={() => set({ mau: clamp(Math.round(inputs.mau), 0, 50_000_000) })}
                       className="max-w-[140px]"
                     />
                   </div>
@@ -539,11 +543,15 @@ export default function Stage2UsageEstimation({
                       type="number"
                       size="small"
                       layout="vertical"
-                      value={String(inputs.realtimePeakConnections)}
+                      min={0}
+                      value={inputs.realtimePeakConnections}
                       onChange={(e: any) =>
+                        set({ realtimePeakConnections: Number(e.target.value) || 0 })
+                      }
+                      onBlur={() =>
                         set({
                           realtimePeakConnections: clamp(
-                            Math.round(Number(e.target.value || 0)),
+                            Math.round(inputs.realtimePeakConnections),
                             0,
                             10_000_000
                           ),
@@ -573,11 +581,13 @@ export default function Stage2UsageEstimation({
                       type="number"
                       size="small"
                       layout="vertical"
-                      value={String(inputs.realtimeMessages)}
-                      onChange={(e: any) =>
+                      min={0}
+                      value={inputs.realtimeMessages}
+                      onChange={(e: any) => set({ realtimeMessages: Number(e.target.value) || 0 })}
+                      onBlur={() =>
                         set({
                           realtimeMessages: clamp(
-                            Math.round(Number(e.target.value || 0)),
+                            Math.round(inputs.realtimeMessages),
                             0,
                             10_000_000_000
                           ),
@@ -625,11 +635,13 @@ export default function Stage2UsageEstimation({
                     type="number"
                     size="small"
                     layout="vertical"
-                    value={String(inputs.edgeInvocations)}
-                    onChange={(e: any) =>
+                    min={0}
+                    value={inputs.edgeInvocations}
+                    onChange={(e: any) => set({ edgeInvocations: Number(e.target.value) || 0 })}
+                    onBlur={() =>
                       set({
                         edgeInvocations: clamp(
-                          Math.round(Number(e.target.value || 0)),
+                          Math.round(inputs.edgeInvocations),
                           0,
                           10_000_000_000
                         ),
@@ -678,10 +690,10 @@ export default function Stage2UsageEstimation({
                     type="number"
                     size="small"
                     layout="vertical"
-                    value={String(inputs.egressGb)}
-                    onChange={(e: any) =>
-                      set({ egressGb: clamp(Number(e.target.value || 0), 0, 100_000) })
-                    }
+                    min={0}
+                    value={inputs.egressGb}
+                    onChange={(e: any) => set({ egressGb: Number(e.target.value) || 0 })}
+                    onBlur={() => set({ egressGb: clamp(inputs.egressGb, 0, 100_000) })}
                     className="max-w-[120px]"
                   />
                 </div>
@@ -772,11 +784,11 @@ export default function Stage2UsageEstimation({
                             type="number"
                             size="small"
                             layout="vertical"
-                            value={String(inputs.logDrains)}
-                            onChange={(e: any) =>
-                              set({
-                                logDrains: clamp(Math.round(Number(e.target.value || 1)), 1, 10),
-                              })
+                            min={1}
+                            value={inputs.logDrains}
+                            onChange={(e: any) => set({ logDrains: Number(e.target.value) || 0 })}
+                            onBlur={() =>
+                              set({ logDrains: clamp(Math.round(inputs.logDrains), 1, 10) })
                             }
                             className="max-w-[60px]"
                           />
diff --git a/apps/www/components/PricingCalculator/stages/Stage4TimeAllocation.tsx b/apps/www/components/PricingCalculator/stages/Stage4TimeAllocation.tsx
index 1a196df2608..0cc4114dcde 100644
--- a/apps/www/components/PricingCalculator/stages/Stage4TimeAllocation.tsx
+++ b/apps/www/components/PricingCalculator/stages/Stage4TimeAllocation.tsx
@@ -63,24 +63,34 @@ export default function Stage4TimeAllocation({
 
   return (
     <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
-      {(Object.keys(FIELD_LABELS) as TimeAllocationKey[]).map((key) => (
-        <Panel key={key} outerClassName="w-full" innerClassName="p-4 md:p-5 flex flex-col gap-2">
-          <label className="text-foreground text-sm">{FIELD_LABELS[key]}</label>
-          <Input
-            type="number"
-            size="small"
-            layout="vertical"
-            value={merged[key] == null ? '' : String(merged[key])}
-            placeholder="Use default"
-            onChange={(e: any) => {
-              const raw = e.target.value
-              if (raw === '') return clearOverride(key)
-              return setOverride(key, Math.max(0, Number(raw)))
-            }}
-          />
-          <p className="text-foreground-lighter text-xs">Optional override. Leave blank to use smart defaults.</p>
-        </Panel>
-      ))}
+      {(Object.keys(FIELD_CONFIG) as TimeAllocationKey[]).map((key) => {
+        const config = FIELD_CONFIG[key]
+        return (
+          <Panel key={key} outerClassName="w-full" innerClassName="p-4 md:p-5 flex flex-col gap-2">
+            <label className="text-foreground text-sm">{config.label}</label>
+            <Input
+              type="number"
+              size="small"
+              layout="vertical"
+              min={0}
+              value={merged[key] == null ? '' : merged[key]}
+              placeholder="Use default"
+              onChange={(e: any) => {
+                const raw = e.target.value
+                if (raw === '') return clearOverride(key)
+                return setOverride(key, Number(raw) || 0)
+              }}
+              onBlur={() => {
+                if (merged[key] != null) {
+                  setOverride(key, Math.max(0, merged[key]))
+                }
+              }}
+            />
+            <p className="text-foreground-lighter text-xs">{config.hint}</p>
+            <p className="text-foreground-lighter text-xs italic">{config.examples}</p>
+          </Panel>
+        )
+      })}
     </div>
   )
 }