Free finance calculators that just work
FinlyCalc is a growing set of fast, focused finance calculators that run entirely in your browser. Mortgages, savings, loans, and more. One job per tool, no signup, and nothing you type ever leaves your device.
No signup
Runs in your browser
Free forever
Updated for 2026
Tools
🏠
Mortgage Calculator
Monthly payment, full amortization schedule, and extra payment savings.
Live
💸
Loan Calculator
Auto, personal, and student loan payments with a payoff timeline.
Live
📈
Compound Interest
See how savings and investments grow over time with regular contributions.
Live
🔄
Refinance Calculator
Compare your current loan to a new rate and see the break even point.
Coming soon
🚗
Auto Loan Calculator
Monthly car payment with trade in, sales tax, and total interest.
Coming soon
🎯
Savings Goal Calculator
Find the monthly amount you need to reach a target by a set date.
Coming soon
🏖️
Retirement Calculator
Project your nest egg and see if your savings rate is on track.
Coming soon
Why FinlyCalc
Built for one job
Each tool answers a single question well, so you get to the answer fast and the page stays easy to read.
Private by design
Every calculation happens in your browser. Your numbers are never sent to a server or stored anywhere.
Always current
Formulas and rates are reviewed each year, so the result you see reflects the current year.
Free, no account
No login, no paywall, no email required. Open a tool and start.