Free Online Calculators That Actually Work
Get instant answers to your math, finance, and health questions. No signup required, no hidden fees, just free calculators that give you the results you need.
Most Popular Calculators
Mortgage Calculator
Calculate your monthly mortgage payment including principal, interest, taxes, and insurance. See how different rates and down payments affect your payment.
BMI Calculator
Check if your weight is healthy for your height. Uses the same formula doctors use to determine if you're underweight, normal, overweight, or obese.
Investment Calculator
Calculate how much your investments will be worth over time. See the power of compound interest and plan your retirement savings.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly. Perfect for cooking, weather, or scientific calculations.
Calorie Calculator
Calculate how many calories you need each day to maintain, lose, or gain weight. Based on your age, height, weight, and activity level.
Unit Converter
Convert length, weight, area, volume, and more. Essential for cooking, travel, work projects, and everyday calculations.
Why Our Calculators Work
Standard Formulas
We use the same formulas that banks, doctors, and professionals use. You can verify our results yourself.
Your Data Stays Private
All calculations happen in your browser. We never see your numbers or store your information.
Instant Results
No waiting, no loading screens. Enter your numbers and get answers immediately.
Calculator Categories
Finance
Calculate mortgage payments, loan terms, and investment returns.
- • Mortgage Calculator
- • Auto Loan Calculator
- • Investment Calculator
- • Retirement Planner
Health
Check your BMI, calculate calories, and track your fitness.
- • BMI Calculator
- • Calorie Calculator
- • Body Fat Calculator
- • Protein Calculator
Conversion
Convert between units instantly - temperature, length, weight, and more.
- • Temperature Converter
- • Length Converter
- • Weight Converter
- • Area Converter
Statistics
Analyze data with confidence intervals and hypothesis testing.
- • Confidence Intervals
- • Regression Analysis
- • Hypothesis Testing
- • P-Value Calculator
Math
Scientific and mathematical tools for students and professionals.
- • Algebra Calculator
- • Geometry Calculator
- • Trigonometry Tools
- • Matrix Calculator
Other
Specialized tools for unique needs and interesting calculations.
- • Numerology Calculator
- • IP Subnet Calculator
- • Life Path Number
- • Gematria Calculator
Common Questions
Are these calculators really free?
Yes, completely free. No registration, no hidden fees, no premium versions. Just open any calculator and start using it.
How accurate are the results?
We use standard formulas that you can verify yourself. For example, our mortgage calculator uses the standard amortization formula used by banks.
Do you store my data?
No. All calculations happen in your browser. We never see your numbers, and nothing gets sent to our servers.
Can I use these for work or school?
Absolutely. Many people use our calculators for homework, work projects, and business decisions. Just double-check important calculations when needed.
Can I suggest new calculators?
Sure! If you need a calculator we don't have, email us at calcbucket@gmail.com and we'll see if we can add it.
87 calculators found