Each one does a single piece of arithmetic properly, shows every line of its working, and runs entirely in your own browser or your own spreadsheet.
Buying a property with other people
A free calculator for people buying a home together with unequal money. It works out each person's ownership share, how the monthly bill divides, what happens on a sale, and what one owner is paid if they leave, for two to eight owners. Every equation is shown.
Alongside it, a paid Ledger workbook and Schedule Kit, $19 once, for keeping the record over the years that follow and for stating the terms your agreement has to settle.
Nothing here is legal, tax or financial advice, and nothing here is an agreement. The tools do arithmetic on figures you enter and state economic terms in plain language. Where money, property or contracts are involved, the people using them should take the result to an attorney, a conveyancer or a tax adviser who practises where the property is.