We build the fastest, most accurate financial calculators on the web.
CalcEngine exists to make financial decision-making easier for everyone. We believe that access to accurate, easy-to-use financial tools should not be locked behind paywalls or require you to hand over personal information.
Every calculation on CalcEngine runs entirely client-side in your browser. Your financial data — your salary, savings, debts, and tax details — never leaves your device. There are no servers processing your numbers and no databases storing your inputs.
CalcEngine is completely free to use. There are no premium tiers, no sign-up requirements, and no paywalls. All 30 of our calculators are available to everyone, all the time.
We update our tools annually to reflect the latest tax brackets, contribution limits, interest rate environments, and regulatory changes so you always have the most current information at your fingertips.
Four principles that guide everything we build.
We use the same formulas financial institutions use. Every calculator is built from industry-standard equations, reviewed for precision, and tested against real-world scenarios to ensure you get results you can trust.
Every calculation updates instantly as you type. No submit buttons, no page reloads, no waiting. Adjust any input and see your results change in real time so you can explore different scenarios effortlessly.
All math runs in your browser. We never see your financial data. Your salary, debts, savings, and tax information stay on your device and are never transmitted to our servers or any third party.
No paywalls, no signup, no premium tiers. Every single calculator on CalcEngine is completely free to use, today and always. We believe financial tools should be accessible to everyone.
CalcEngine offers 30 free financial calculators spanning mortgages, salary conversions, retirement planning, tax estimation, debt payoff, and government pay. Whether you are buying your first home, negotiating a raise, planning for retirement, or paying down student loans, we have a tool to help you make smarter decisions.
Every calculator features real-time results, clear breakdowns, and visual charts so you can understand your finances at a glance.
Have a question, found a bug, or want to suggest a new calculator? We would love to hear from you.
hello@calcengine.org
GitHub
github.com/calcengine