How to get Grand Total in Base Currency

Question

I am using the below code to get Sub Total and Grand Total but it is returning total in Display Currency.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$cart = $objectManager->get('\Magento\Checkout\Model\Cart'); 
 
$subTotal = $cart->getQuote()->getSubtotal();
$grandTotal = $cart->getQuote()->getGrandTotal();

How to get the grand Total in Base Currency in case Default Currency is different than Display Currency.

I am able to get the Base Currency Total by below code, but it is not exactly the same as displayed on "You will be charged for" on the payment page.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$cart = $objectManager->get('\Magento\Checkout\Model\Cart'); 

$grandTotal = $cart->getQuote()->getGrandTotal();

$priceCurrencyFactory = $objectManager->get('Magento\Directory\Model\CurrencyFactory');
$storeManager = $objectManager->get('Magento\Store\Model\StoreManagerInterface');
 
$currencyCodeTo = $storeManager->getStore()->getCurrentCurrency()->getCode();
$currencyCodeFrom = $storeManager->getStore()->getBaseCurrency()->getCode();

$rate = $priceCurrencyFactory->create()->load($currencyCodeTo)->getAnyRate($currencyCodeFrom);
$baseTotal = $grandTotal * $rate;

Difference of value is shown in image.

Answer 1

 public function convertToBaseCurrency($price)
        {
     $Value = $price * $rate;
    
    //   step1 : get currenct currency
         
            $currentCurrencyCode = $this->storeManager
                                    ->getStore()
                                    ->getCurrentCurrency()
                                    ->getCode();
   // Step 2 : get base currency
            $baseCurrencyCode = $this->storeManager
                                 ->getStore()
                                 ->getBaseCurrency()
                                 ->getCode();
   // Step 3 : get rate
            $currencyRate= $this->currencyFactory
                         ->create()
                         ->load($currentCurrencyCode)
                         ->getAnyRate($baseCurrencyCode);
  //  step 4 : get value
            $Value = $price * $currencyRate;
    
            return $Value;
        }