diff --git a/server/controllers/reports.go b/server/controllers/reports.go
index 6284ffa..6db3f10 100644
--- a/server/controllers/reports.go
+++ b/server/controllers/reports.go
@@ -25,7 +25,7 @@ func getMileageForVehicle(c *gin.Context) {
 			return
 		}
 
-		fillups, err := service.GetMileageByVehicleId(searchByIdQuery.Id, model.Since)
+		fillups, err := service.GetMileageByVehicleId(searchByIdQuery.Id, model.Since, model.MileageOption)
 		if err != nil {
 			c.JSON(http.StatusUnprocessableEntity, common.NewError("getMileageForVehicle", err))
 			return
diff --git a/server/models/report.go b/server/models/report.go
index 40e5403..c436b84 100644
--- a/server/models/report.go
+++ b/server/models/report.go
@@ -14,7 +14,7 @@ type MileageModel struct {
 	FuelQuantity float32     `form:"fuelQuantity" json:"fuelQuantity" binding:"required"`
 	PerUnitPrice float32     `form:"perUnitPrice" json:"perUnitPrice" binding:"required"`
 	Currency     string      `json:"currency"`
-
+	DistanceUnit db.DistanceUnit `form:"distanceUnit" json:"distanceUnit"`
 	Mileage     float32 `form:"mileage" json:"mileage" binding:"mileage"`
 	CostPerMile float32 `form:"costPerMile" json:"costPerMile" binding:"costPerMile"`
 	OdoReading  int     `form:"odoReading" json:"odoReading" binding:"odoReading"`
@@ -35,4 +35,5 @@ func (b *MileageModel) MarshalJSON() ([]byte, error) {
 
 type MileageQueryModel struct {
 	Since time.Time `json:"since" query:"since" form:"since"`
+	MileageOption string `json:"mileageOption" query:"mileageOption" form:"mileageOption"`
 }
diff --git a/server/service/reportService.go b/server/service/reportService.go
index d58b9cd..7daf69b 100644
--- a/server/service/reportService.go
+++ b/server/service/reportService.go
@@ -4,11 +4,12 @@ import (
 	"sort"
 	"time"
 
+	"github.com/akhilrex/hammond/common"
 	"github.com/akhilrex/hammond/db"
 	"github.com/akhilrex/hammond/models"
 )
 
-func GetMileageByVehicleId(vehicleId string, since time.Time) (mileage []models.MileageModel, err error) {
+func GetMileageByVehicleId(vehicleId string, since time.Time, mileageOption string) (mileage []models.MileageModel, err error) {
 	data, err := db.GetFillupsByVehicleIdSince(vehicleId, since)
 	if err != nil {
 		return nil, err
@@ -36,14 +37,48 @@ func GetMileageByVehicleId(vehicleId string, since time.Time) (mileage []models.
 			PerUnitPrice: currentFillup.PerUnitPrice,
 			OdoReading:   currentFillup.OdoReading,
 			Currency:     currentFillup.Currency,
+			DistanceUnit: currentFillup.DistanceUnit,
 			Mileage:      0,
 			CostPerMile:  0,
 		}
 
 		if currentFillup.IsTankFull != nil && *currentFillup.IsTankFull && (currentFillup.HasMissedFillup == nil || !(*currentFillup.HasMissedFillup)) {
-			distance := float32(currentFillup.OdoReading - lastFillup.OdoReading)
-			mileage.Mileage = distance / currentFillup.FuelQuantity
-			mileage.CostPerMile = distance / currentFillup.TotalAmount
+			currentOdoReading := float32(currentFillup.OdoReading);
+			lastFillupOdoReading := float32(lastFillup.OdoReading);
+			currentFuelQuantity := float32(currentFillup.FuelQuantity);
+			// If miles per gallon option and distanceUnit is km, convert from km to miles 
+			// 	then check if fuel unit is litres. If it is, convert to gallons
+			if (mileageOption == "mpg" && mileage.DistanceUnit == db.KILOMETERS) {
+				currentOdoReading = common.KmToMiles(currentOdoReading);
+				lastFillupOdoReading = common.KmToMiles(lastFillupOdoReading);
+				if (mileage.FuelUnit == db.LITRE) {
+					currentFuelQuantity = common.LitreToGallon(currentFuelQuantity);
+				}
+			}
+
+			// If km_litre option or litre per 100km and distanceUnit is miles, convert from miles to km 
+			// 	then check if fuel unit is not litres. If it isn't, convert to litres
+
+			if ((mileageOption == "km_litre" || mileageOption == "litre_100km") && mileage.DistanceUnit == db.MILES) {
+				currentOdoReading = common.MilesToKm(currentOdoReading);
+				lastFillupOdoReading = common.MilesToKm(lastFillupOdoReading);
+
+				if (mileage.FuelUnit == db.US_GALLON) {
+					currentFuelQuantity = common.GallonToLitre(currentFuelQuantity);
+				}
+			} 
+
+			
+
+
+			distance := float32(currentOdoReading - lastFillupOdoReading);
+			if (mileageOption == "litre_100km") {
+				mileage.Mileage = currentFuelQuantity / distance * 100;
+			} else {
+				mileage.Mileage = distance / currentFuelQuantity;
+			}
+
+			mileage.CostPerMile = distance / currentFillup.TotalAmount;
 
 		}