Backsolve

Backsolve answers one question: how much do I need to invest, on a regular basis, to reach a specific savings goal? Enter your target amount, starting balance, expected return, and timeline. Backsolve solves for the exact contribution you need, down to the cent. No guessing, no spreadsheets. FEATURES • Solve for the exact contribution needed to hit any target • See a year-by-year breakdown with a growth chart • Compound Interest Calculator - project how any contribution plan grows over time • Coast FIRE Calculator - see when you can stop actively saving and let compounding finish the job • Choose yearly, monthly, or biweekly compounding • Light and dark mode, following your device or your own choice • No accounts, no sign-in, no data collection beyond what's needed to show ads Whether you're planning for retirement, a house down payment, or any other savings goal, Backsolve gives you a straight answer in seconds.