Clear numbers for splitting bills, budgeting and saving.

Free calculators that run in your browser. No sign-up, nothing sent to a server.

Each calculator runs on this device. Nothing you type is sent to a server. The guides use the same math when you want the reasoning.

Latest guides

BudgetingThe 50/30/20 rule, tested on a real paycheckHow to sort every dollar into needs, wants and savings without a spreadsheet. · 9 min readBillsSplitting rent fairly when rooms are not equalThree methods roommates use, with worked numbers for each. · 7 min readSavingHow to size an emergency fund you will actually finishStart with one month of essentials, then build in steps. · 8 min readMovingA moving budget checklist for your first apartmentThe cash you need before the first night, from the deposit to the boxes. · 7 min readAll guides ›