diff --git a/htdocs/index.html b/htdocs/index.html
index 53c0e75..b1d04a7 100644
--- a/htdocs/index.html
+++ b/htdocs/index.html
@@ -68,21 +68,21 @@
             </td>
           </tr>
           <tr>
-            <td style="text-align: right">Total GB:</td>
+            <td style="text-align: right">Total:</td>
             <td id="ID_Renter_EstimatedSpace"></td>
             <td colspan="50%"></td>
             <td style="text-align: right">Price (per GB):</td>
             <td id="ID_Renter_EstimatedCost"></td>
           </tr>
           <tr>
-            <td style="text-align: right">Available GB:</td>
+            <td style="text-align: right">Available:</td>
             <td id="ID_Renter_AvailablSpace"></td>
             <td colspan="50%"></td>
             <td style="text-align: right">Download (per GB):</td>
             <td id="ID_Renter_EstimatedDownloadCost"></td>
           </tr>
           <tr>
-            <td style="text-align: right">Used GB:</td>
+            <td style="text-align: right">Used:</td>
             <td id="ID_Renter_UsedSpace"></td>
             <td colspan="50%"></td>
             <td style="text-align: right">Upload (per GB):</td>
diff --git a/include/siadrive_api/siacommon.h b/include/siadrive_api/siacommon.h
index a381265..8d40424 100644
--- a/include/siadrive_api/siacommon.h
+++ b/include/siadrive_api/siacommon.h
@@ -3,7 +3,7 @@
 #include <cstdint>
 
 #define SIDRIVE_VERSION_STRING "0.0.1"
-#define COMPAT_SIAD_VERSION "1.1.2"
+#define COMPAT_SIAD_VERSION "1.2.0"
 
 #ifdef _WIN32 
   // Disable DLL-interface warnings
@@ -194,15 +194,6 @@ inline static Hastings SiaCurrencyToHastings(const SiaCurrency& currency)
   return parser.stack[0].value.ToString(conv);
 }
 
-inline static SString SiaCurrencyToGB(const SiaCurrency& value)
-{
-	ttmath::Conv conv;
-	conv.base = 10;
-	conv.round = 3;
-
-	return value.ToWString(conv);
-}
-
 SString SIADRIVE_EXPORTABLE BytesToFriendlyDisplay(const SiaCurrency& bytes);
 
 BOOL SIADRIVE_EXPORTABLE RetryAction(std::function<BOOL()> func, std::uint16_t retryCount, const DWORD& retryDelay);
diff --git a/src/siadrive/siadriveapp.cpp b/src/siadrive/siadriveapp.cpp
index 3fab5ae..697db35 100644
--- a/src/siadrive/siadriveapp.cpp
+++ b/src/siadrive/siadriveapp.cpp
@@ -438,12 +438,13 @@ void CSiaDriveApp::SiaApiRefreshCallback(CefRefPtr<CefV8Context> context, const
       global->GetValue("uiState")->SetValue("allocatedRenterFunds", CefV8Value::CreateString(SiaCurrencyToString(allocatedFunds).str()), V8_PROPERTY_ATTRIBUTE_NONE);
 
       // Space
-      SiaCurrency totalUsedGb = _siaApi->GetRenter()->GetTotalUsedBytes() ? _siaApi->GetRenter()->GetTotalUsedBytes() / (1024.0 * 1024.0 * 1024.0) : 0.0;
-			auto totalAvailable = (totalUsedGb / (allocatedFunds - unspentFunds)) * allocatedFunds;
-      auto totalRemainGb = totalAvailable - totalUsedGb;
-      ExecuteSetter(context, renterActions, "setEstimatedSpace", SiaCurrencyToGB(totalAvailable));
-      ExecuteSetter(context, renterActions, "setAvailableSpace", SiaCurrencyToGB(totalRemainGb));
-      ExecuteSetter(context, renterActions, "setUsedSpace", SiaCurrencyToGB(totalUsedGb));
+      SiaCurrency totalUsed = _siaApi->GetRenter()->GetTotalUsedBytes() ? _siaApi->GetRenter()->GetTotalUsedBytes() : 0.0;
+      SiaCurrency totalAvailable;
+      _siaApi->GetRenter()->CalculateEstimatedStorage(allocatedFunds, totalAvailable);
+      auto totalRemain = totalAvailable > 0 ? totalAvailable - totalUsed : 0;
+      ExecuteSetter(context, renterActions, "setEstimatedSpace", BytesToFriendlyDisplay(totalAvailable));
+      ExecuteSetter(context, renterActions, "setAvailableSpace", BytesToFriendlyDisplay(totalRemain));
+      ExecuteSetter(context, renterActions, "setUsedSpace", BytesToFriendlyDisplay(totalUsed));
 
       // Upload Progress
       /*