Calculate a field using price and acf value

• deepal56

• May 1, 2021 at 3:13 pm

For my pharmacy store I have product which contains 10 tablets in a strip. The default price is the price of the whole strip. I want to calculate price per tablet.

I have added the following custom fields:
Number of tablets:
Price per tablet:

I want to calculate the price per tablet using “(regular price or sale price)/(number of tablets)”.

I want to use code-snippets instead of child theme.

• deepal56

• May 1, 2021 at 4:19 pm

Update:
I was able to update the price per tablet by using the following code:

function wc_update_price_per_unit($post_id) {
    $value= get_field('_price')/get_field('number_of_unit');//use _regular_price to get regular woocommerce price
	$field_name = "price_per_unit";
	update_field($field_name,$value,$post_id);
}
add_action('save_post','wc_update_price_per_unit');

The price_per_tablet value gets populated when saving the post. How can I see changes in the price_per_unit field before saving or updating the post.