diff --git a/tests/unit/handlers/metrics.handlers.test.js b/tests/unit/handlers/metrics.handlers.test.js
index a7ca481..e675a58 100644
--- a/tests/unit/handlers/metrics.handlers.test.js
+++ b/tests/unit/handlers/metrics.handlers.test.js
@@ -75,7 +75,7 @@ test('getHashrate - grouped by miner uses type group aggregation', async (t) =>
         capturedPayload = payload
         return [{
           ts: 1700006400000,
-          hashrate_mhs_5m_type_group_sum_aggr: 123456
+          hashrate_mhs_5m_type_group_sum_aggr: { 'S19-Pro': 100000, 'S21': 23456 }
         }]
       }
     }
@@ -88,8 +88,12 @@ test('getHashrate - grouped by miner uses type group aggregation', async (t) =>
   t.is(capturedPayload.fields.hashrate_mhs_5m_type_group_sum, 1, 'should request type-group source field')
   t.is(capturedPayload.aggrFields.hashrate_mhs_5m_type_group_sum_aggr, 1, 'should request type-group aggregate field')
   t.is(result.log.length, 1, 'should map one grouped row')
-  t.is(result.log[0].hashrateMhs, 123456, 'should map grouped hashrate value')
-  t.alike(result.summary, {}, 'grouped response should return empty summary')
+  t.alike(result.log[0].hashrateMhs, { 'S19-Pro': 100000, 'S21': 23456 }, 'should map grouped hashrate value')
+  t.is(result.summary.totalHashrateMhs, 123456, 'should have site-wide total')
+  t.is(result.summary.avgHashrateMhs, 123456, 'should have site-wide average')
+  t.ok(result.summary.groupedBy, 'should have per-miner breakdown')
+  t.is(result.summary.groupedBy['S19-Pro'].totalHashrateMhs, 100000, 'should have per-miner total')
+  t.is(result.summary.groupedBy['S21'].totalHashrateMhs, 23456, 'should have per-miner total')
   t.pass()
 })
 
@@ -102,7 +106,7 @@ test('getHashrate - grouped by container uses container group aggregation', asyn
         capturedPayload = payload
         return [{
           ts: 1700006400000,
-          hashrate_mhs_5m_container_group_sum_aggr: 777
+          hashrate_mhs_5m_container_group_sum_aggr: { 'container-A': 500, 'container-B': 277 }
         }]
       }
     }
@@ -115,8 +119,11 @@ test('getHashrate - grouped by container uses container group aggregation', asyn
   t.is(capturedPayload.fields.hashrate_mhs_5m_container_group_sum, 1, 'should request container-group source field')
   t.is(capturedPayload.aggrFields.hashrate_mhs_5m_container_group_sum_aggr, 1, 'should request container-group aggregate field')
   t.is(result.log.length, 1, 'should map grouped row')
-  t.is(result.log[0].hashrateMhs, 777, 'should map container grouped hashrate value')
-  t.alike(result.summary, {}, 'grouped response should return empty summary')
+  t.alike(result.log[0].hashrateMhs, { 'container-A': 500, 'container-B': 277 }, 'should map container grouped hashrate value')
+  t.is(result.summary.totalHashrateMhs, 777, 'should have site-wide total')
+  t.ok(result.summary.groupedBy, 'should have per-container breakdown')
+  t.is(result.summary.groupedBy['container-A'].totalHashrateMhs, 500, 'should have per-container total')
+  t.is(result.summary.groupedBy['container-B'].totalHashrateMhs, 277, 'should have per-container total')
   t.pass()
 })
 
@@ -131,7 +138,8 @@ test('getHashrate - grouped mode handles empty results', async (t) => {
   })
 
   t.is(result.log.length, 0, 'grouped log should be empty when no data is returned')
-  t.alike(result.summary, {}, 'grouped summary should still be empty object')
+  t.is(result.summary.avgHashrateMhs, null, 'grouped empty summary should have null avg')
+  t.is(result.summary.totalHashrateMhs, 0, 'grouped empty summary should have zero total')
   t.pass()
 })
 
diff --git a/workers/lib/server/handlers/metrics.handlers.js b/workers/lib/server/handlers/metrics.handlers.js
index a3d04ac..d19ae25 100644
--- a/workers/lib/server/handlers/metrics.handlers.js
+++ b/workers/lib/server/handlers/metrics.handlers.js
@@ -82,7 +82,9 @@ async function getGoupedHashrate (ctx, req) {
     return aggr
   }, [])
 
-  return { log, summary: {} }
+  const summary = calculateGroupedHashrateSummary(log, groupBy)
+
+  return { log, summary }
 }
 
 function processHashrateData (results) {
@@ -112,6 +114,45 @@ function calculateHashrateSummary (log) {
   }
 }
 
+function calculateGroupedHashrateSummary (log, groupBy) {
+  if (!log.length) {
+    return {
+      avgHashrateMhs: null,
+      totalHashrateMhs: 0
+    }
+  }
+
+  const groupTotals = {}
+  const groupCounts = {}
+
+  for (const entry of log) {
+    const hashrate = entry.hashrateMhs
+    if (typeof hashrate === 'object' && hashrate !== null) {
+      for (const [name, val] of Object.entries(hashrate)) {
+        const v = Number(val) || 0
+        groupTotals[name] = (groupTotals[name] || 0) + v
+        groupCounts[name] = (groupCounts[name] || 0) + 1
+      }
+    }
+  }
+
+  const byGroup = {}
+  let siteTotal = 0
+  for (const [name, total] of Object.entries(groupTotals)) {
+    byGroup[name] = {
+      avgHashrateMhs: safeDiv(total, groupCounts[name]),
+      totalHashrateMhs: total
+    }
+    siteTotal += total
+  }
+
+  return {
+    avgHashrateMhs: safeDiv(siteTotal, log.length),
+    totalHashrateMhs: siteTotal,
+    groupedBy: byGroup
+  }
+}
+
 async function getConsumption (ctx, req) {
   const { start, end } = validateStartEnd(req)
 
@@ -728,6 +769,7 @@ module.exports = {
   getHashrate,
   processHashrateData,
   calculateHashrateSummary,
+  calculateGroupedHashrateSummary,
   getConsumption,
   processConsumptionData,
   calculateConsumptionSummary,