HOW MANY?
We use 'How Many' with countable plural nouns. Countable nouns are objects that you can count, such as apples, telephones, or cars.
• How many days
• How many books?
• How many chairs?
• How many euros?
• How many people
HOW MUCH?
We use 'How Much' with uncountable nouns. Money is an example of a non-countable noun, so when talking about money and cost, you will need to use the phrase "how much."
• How much time?
• How much sugar?
• How much is it?
• How much water?
• How much honey?