Change number of decimals in Woocommerce cart totals

Question

In Woocommerce, I\'ve set the number of decimal to 7 on in Woocommerce general settings, so I can display the product price like this $0.0453321

Answer 1

The correct way is to change just the number of allowed decimals for cart and checkout pages only:

add_filter( 'wc_get_price_decimals', 'change_prices_decimals', 20, 1 );
function change_prices_decimals( $decimals ){
    if( is_cart() || is_checkout() )
        $decimals = 2;
    return $decimals;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

---

To set the dispayed cart gran total with 2 decimals use this instead (for Woocommerce 3.3+ only):

add_filter( 'woocommerce_cart_tax_totals', 'change_decimals_cart_tax_totals', 20, 2 );
function change_decimals_cart_tax_totals( $tax_totals, $cart ){
    $decimals = array('decimals' => 2);

    $taxes      = $cart->get_taxes();
    $tax_totals = array();

    foreach ( $taxes as $key => $tax ) {
        $code = WC_Tax::get_rate_code( $key );

        if ( $code || $key === apply_filters( 'woocommerce_cart_remove_taxes_zero_rate_id', 'zero-rated' ) ) {
            if ( ! isset( $tax_totals[ $code ] ) ) {
                $tax_totals[ $code ] = new stdClass();
                $tax_totals[ $code ]->amount = 0;
            }
            $tax_totals[ $code ]->tax_rate_id       = $key;
            $tax_totals[ $code ]->is_compound       = WC_Tax::is_compound( $key );
            $tax_totals[ $code ]->label             = WC_Tax::get_rate_label( $key );
            $tax_totals[ $code ]->amount           += wc_round_tax_total( $tax );
            $tax_totals[ $code ]->formatted_amount  = wc_price( wc_round_tax_total( $tax_totals[ $code ]->amount ), $decimals );
        }
    }

    if ( apply_filters( 'woocommerce_cart_hide_zero_taxes', true ) ) {
        $amounts    = array_filter( wp_list_pluck( $tax_totals, 'amount' ) );
        $tax_totals = array_intersect_key( $tax_totals, $amounts );
    }
    return $tax_totals;
}

add_filter( 'woocommerce_cart_totals_order_total_html', 'change_decimals_cart_totals_order_total_html', 20, 1 );
function change_decimals_cart_totals_order_total_html( $formatted_price ){
    $decimals = array('decimals' => 2);

    $value = '' . wc_price( WC()->cart->get_total('edit'), $decimals ) . ' ';

    // If prices are tax inclusive, show taxes here.
    if ( wc_tax_enabled() && WC()->cart->display_prices_including_tax() ) {
        $tax_string_array = array();
        $cart_tax_totals  = WC()->cart->get_tax_totals();

        if ( get_option( 'woocommerce_tax_total_display' ) == 'itemized' ) {
            foreach ( $cart_tax_totals as $code => $tax ) {
                $tax_string_array[] = sprintf( '%s %s', $tax->formatted_amount, $tax->label );
            }
        } elseif ( ! empty( $cart_tax_totals ) ) {
            $tax_string_array[] = sprintf( '%s %s', wc_price( WC()->cart->get_taxes_total( true, true ), $decimals ), WC()->countries->tax_or_vat() );
        }

        if ( ! empty( $tax_string_array ) ) {
            $taxable_address = WC()->customer->get_taxable_address();
            $estimated_text  = WC()->customer->is_customer_outside_base() && ! WC()->customer->has_calculated_shipping()
                ? sprintf( ' ' . __( 'estimated for %s', 'woocommerce' ), WC()->countries->estimated_for_prefix( $taxable_address[0] ) . WC()->countries->countries[ $taxable_address[0] ] )
                : '';
            $value .= '' . sprintf( __( '(includes %s)', 'woocommerce' ), implode( ', ', $tax_string_array ) . $estimated_text ) . '';
        }
    }
    return $value;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

You can't really round the prices in cart totals appart. If you do it with different hooks, you will get calculation errors. My code is just changing the number of decimals on displayed formatted prices and will not alter the calculations on real prices…

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