Roommate Expense Split Calculator

How it is calculated

The tool splits one combined figure equally: per person = total expenses ÷ number of people. Add up all the shared costs for the period yourself (rent, utilities, internet, shared groceries) and enter that sum as the total, then enter how many people share it, counting yourself. The result is rounded to cents, so a split that does not divide evenly, such as 100 among 3, shows $33.33, and three payments of that amount are one cent short of the total. The total must be zero or more, and the number of people must be a whole number of at least 1; a fraction such as 2.5 or a zero gives no result. Everyone pays the same share; the tool does not weight by room size, income or days in the home.

Common mistakes

• Forgetting to count yourself. With 3 roommates plus you the divisor is 4, not 3.
• Entering only the rent in the total and then splitting utilities separately, which hides the full monthly cost for each person. Add everything shared into one total first.
• Including personal expenses that only one person uses, such as one person's phone plan or a private subscription.
• Using an equal split when rooms differ a lot in size or when someone is away for part of the month. This tool always divides evenly, so adjust the amounts yourself.
• Typing a part-person such as 2.5 to account for a partner who stays some nights. The people count must be a whole number, so a fraction shows no result; agree a different total instead.