diff --git a/common/constants.go b/common/constants.go
index 88ef15df..643c2b34 100644
--- a/common/constants.go
+++ b/common/constants.go
@@ -15,7 +15,7 @@ var Footer = ""
 var Logo = ""
 var TopUpLink = ""
 var ChatLink = ""
-var QuotaPerUnit = 0.002 // $0.002 / 1K tokens
+var QuotaPerUnit = 500 * 1000.0 // $0.002 / 1K tokens
 var DisplayInCurrencyEnabled = false
 
 var UsingSQLite = false
diff --git a/common/logger.go b/common/logger.go
index 56c9de74..3658dbdb 100644
--- a/common/logger.go
+++ b/common/logger.go
@@ -45,7 +45,7 @@ func FatalLog(v ...any) {
 
 func LogQuota(quota int) string {
 	if DisplayInCurrencyEnabled {
-		return fmt.Sprintf("＄%.6f 额度", float64(quota)/1000*QuotaPerUnit)
+		return fmt.Sprintf("＄%.6f 额度", float64(quota)/QuotaPerUnit)
 	} else {
 		return fmt.Sprintf("%d 点额度", quota)
 	}
diff --git a/controller/billing.go b/controller/billing.go
index ef72a62a..8197bc88 100644
--- a/controller/billing.go
+++ b/controller/billing.go
@@ -21,7 +21,7 @@ func GetSubscription(c *gin.Context) {
 	}
 	amount := float64(quota)
 	if common.DisplayInCurrencyEnabled {
-		amount = amount / 1000 * common.QuotaPerUnit
+		amount /= common.QuotaPerUnit
 	}
 	subscription := OpenAISubscriptionResponse{
 		Object:             "billing_subscription",
@@ -49,7 +49,7 @@ func GetUsage(c *gin.Context) {
 	}
 	amount := float64(quota)
 	if common.DisplayInCurrencyEnabled {
-		amount = amount / 1000 * common.QuotaPerUnit
+		amount /= common.QuotaPerUnit
 	}
 	usage := OpenAIUsageResponse{
 		Object:     "list",
diff --git a/web/src/helpers/render.js b/web/src/helpers/render.js
index 276cb45d..a9c81cc1 100644
--- a/web/src/helpers/render.js
+++ b/web/src/helpers/render.js
@@ -43,7 +43,7 @@ export function renderQuota(quota, digits = 2) {
   quotaPerUnit = parseFloat(quotaPerUnit);
   displayInCurrency = displayInCurrency === 'true';
   if (displayInCurrency) {
-    return '$' + (quota / 1000 * quotaPerUnit).toFixed(digits);
+    return '$' + (quota / quotaPerUnit).toFixed(digits);
   }
   return renderNumber(quota);
 }