Free Online Calculators
Simple, accurate financial and health calculators — no sign-up required.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization schedule.
Compound Interest Calculator
See how your investments grow over time with compound interest. Plan your retirement savings.
Loan Calculator
Estimate monthly payments for car loans, personal loans, and student loans.
Credit Card Payoff
See how long to pay off your balance, total interest, and compare against minimum payments.
BMI Calculator
Calculate your Body Mass Index and see if you're in a healthy weight range.
Calorie Calculator
Find out how many calories you need per day to maintain, lose, or gain weight.
About NumFi
NumFi provides free, easy-to-use online calculators to help you make better financial and health decisions. Whether you're buying a home, planning for retirement, taking out a loan, or managing your weight, our tools give you instant results.
All calculations happen directly in your browser — no data is sent to our servers. Your inputs remain private on your device.
Why Use Our Calculators?
- Free forever — No sign-up, no hidden fees, no paywalls.
- Fast results — Get instant calculations as you type.
- Private — All processing happens locally in your browser.
- Mobile-friendly — Works perfectly on phones and tablets.