# Calculator Suite > 100+ free online calculators across finance, health & fitness, math, time & date, and unit conversions. All calculators run instantly in the browser with no sign-up required. ## Finance Calculators - [Mortgage Calculator](https://www.calculatorsuite.com/finance/mortgage-calculator): Calculate monthly mortgage repayments with instant amortization schedule - [Compound Interest Calculator](https://www.calculatorsuite.com/finance/compound-interest-calculator): Calculate compound interest growth over time - [Retirement Calculator](https://www.calculatorsuite.com/finance/retirement-calculator): Estimate how much you need to retire - [401k Calculator](https://www.calculatorsuite.com/finance/401k-calculator): Project your 401k retirement savings - [Income Tax Calculator](https://www.calculatorsuite.com/finance/income-tax-calculator): Calculate 2025 & 2026 US federal income tax - [Savings Calculator](https://www.calculatorsuite.com/finance/savings-calculator): See how your savings grow over time - [Car Loan Calculator](https://www.calculatorsuite.com/finance/car-loan-calculator): Calculate monthly auto loan payments - [Personal Loan Calculator](https://www.calculatorsuite.com/finance/personal-loan-calculator): Calculate personal loan repayments - [Home Loan Calculator](https://www.calculatorsuite.com/finance/home-loan-calculator): Calculate monthly home loan payments - [Amortization Calculator with Schedule](https://www.calculatorsuite.com/finance/amortization-calculator-with-schedule): Full loan amortization schedule - [Credit Card Payoff Calculator](https://www.calculatorsuite.com/finance/credit-card-payoff-calculator): Calculate how fast you can pay off credit card debt - [Credit Card Interest Calculator](https://www.calculatorsuite.com/finance/credit-card-interest-calculator): Calculate credit card interest charges - [Credit Card Calculator](https://www.calculatorsuite.com/finance/credit-card-calculator): Multiple credit card calculation tools - [Debt to Income Ratio Calculator](https://www.calculatorsuite.com/finance/debt-to-income-ratio-calculator): Calculate your debt-to-income ratio - [Investment Calculator](https://www.calculatorsuite.com/finance/investment-calculator): Project investment growth over time - [FIRE Calculator](https://www.calculatorsuite.com/finance/fire-calculator): Calculate your Financial Independence Retire Early number - [Annuity Calculator](https://www.calculatorsuite.com/finance/annuity-calculator): Calculate present value and future value of annuities - [Inflation Calculator](https://www.calculatorsuite.com/finance/inflation-calculator): Calculate the impact of inflation on money - [Annual Income Calculator](https://www.calculatorsuite.com/finance/annual-income-calculator): Convert any pay rate to yearly salary - [Hourly to Salary Calculator](https://www.calculatorsuite.com/finance/hourly-to-salary-calculator): Convert hourly rate to annual salary - [Salary to Hourly Calculator](https://www.calculatorsuite.com/finance/salary-to-hourly-calculator): Convert annual salary to hourly rate - [Paycheck Calculator](https://www.calculatorsuite.com/finance/pay-check-calculator): Calculate exact net pay after deductions - [Take Home Pay Calculator](https://www.calculatorsuite.com/finance/take-home-pay-calculator): Calculate real net pay after tax - [Discount Calculator](https://www.calculatorsuite.com/finance/discount-calculator): Calculate sale discounts instantly - [Percent Off Calculator](https://www.calculatorsuite.com/finance/percent-off-calculator): Calculate percentage discounts - [Rent Calculator](https://www.calculatorsuite.com/finance/rent-calculator): Calculate how much rent you can afford - [House Affordability Calculator](https://www.calculatorsuite.com/finance/house-affordability-calculator): Calculate how much house you can afford - [Living Cost Calculator](https://www.calculatorsuite.com/finance/living-cost-calculator): Estimate monthly living expenses - [Fixed Deposit Savings Calculator](https://www.calculatorsuite.com/finance/fixed-deposit-savings-calculator): Calculate fixed deposit returns - [PPP Calculator](https://www.calculatorsuite.com/finance/ppp-calculator): Purchasing Power Parity currency comparison ## Health & Fitness Calculators - [BMI Calculator](https://www.calculatorsuite.com/health-fitness/bmi-calculator): Calculate Body Mass Index and healthy weight range - [Calorie Calculator](https://www.calculatorsuite.com/health-fitness/calorie-calculator): Calculate daily calorie needs based on activity level - [BMR Calculator](https://www.calculatorsuite.com/health-fitness/bmr-calculator): Calculate Basal Metabolic Rate — calories burned at rest - [Weight Loss Calculator](https://www.calculatorsuite.com/health-fitness/weight-loss-calculator): Calculate how long it will take to lose weight - [Body Fat Percentage Calculator](https://www.calculatorsuite.com/health-fitness/body-fat-percentage-calculator): Estimate body fat percentage - [Age Calculator](https://www.calculatorsuite.com/health-fitness/age-calculator): Calculate exact age from date of birth - [FFMI Calculator](https://www.calculatorsuite.com/health-fitness/ffmi-calculator): Fat-Free Mass Index calculator with chart - [RFM Calculator](https://www.calculatorsuite.com/health-fitness/rfm-calculator): Relative Fat Mass calculator with chart - [Waist to Hip Ratio Calculator](https://www.calculatorsuite.com/health-fitness/waist-to-hip-ratio-calculator): Calculate waist-to-hip ratio - [Waist to Height Ratio Calculator](https://www.calculatorsuite.com/health-fitness/waist-to-height-ratio-calculator): Calculate waist-to-height ratio - [Body Measurements Calculator](https://www.calculatorsuite.com/health-fitness/body-measurements-calculator): Full body measurement analysis - [Leg to Body Ratio Calculator](https://www.calculatorsuite.com/health-fitness/leg-to-body-ratio-calculator): Calculate leg-to-body ratio - [Calories Burned Running Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-running-calculator): Estimate calories burned running - [Calories Burned Walking Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-walking-calculator): Estimate calories burned walking - [Calories Burned Biking Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-biking-calculator): Estimate calories burned cycling - [Calories Burned Swimming Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-swimming-calculator): Estimate calories burned swimming - [Calories Burned on a Treadmill Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-on-a-treadmill-calculator): Estimate treadmill calorie burn - [Calories Burned on an Elliptical Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-on-an-elliptical-calculator): Estimate elliptical calorie burn - [Elliptical Calorie Calculator](https://www.calculatorsuite.com/health-fitness/elliptical-calorie-calculator): Calculate calories burned on elliptical - [Calories Burned Rowing Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-rowing-calculator): Estimate calories burned rowing - [Calories Burned Weight Lifting Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-weight-lifting-calculator): Estimate calories burned lifting weights - [Calories Burned Yoga Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-yoga-calculator): Estimate calories burned doing yoga - [Calories Burned Pilates Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-pilates-calculator): Estimate calories burned doing Pilates - [Calories Burned Dancing Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-dancing-calculator): Estimate calories burned dancing - [Calories Burned Jump Rope Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-jump-rope-calculator): Estimate calories burned jumping rope - [Calories Burned Jumping Jacks Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-jumping-jacks-calculator): Estimate calories burned doing jumping jacks - [Calories Burned Rock Climbing Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-rock-climbing-calculator): Estimate calories burned rock climbing - [Calories Burned Tennis Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-tennis-calculator): Estimate calories burned playing tennis - [Calories Burned Standing Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-standing-calculator): Estimate calories burned standing - [Calories Burned Sleeping Calculator](https://www.calculatorsuite.com/health-fitness/calories-burned-sleeping-calculator): Estimate calories burned while sleeping ## Math Calculators - [Scientific Calculator](https://www.calculatorsuite.com/math/scientific-calculator): Full-featured online scientific calculator - [Percentage Change Calculator](https://www.calculatorsuite.com/math/percentage-change-calculator): Calculate percentage increase or decrease - [Volume Calculator](https://www.calculatorsuite.com/math/volume-calculator): Calculate volume of cube, cylinder, and sphere - [Area of a Circle Calculator](https://www.calculatorsuite.com/math/area-of-a-circle): Calculate circle area from radius or diameter - [Circumference Calculator](https://www.calculatorsuite.com/math/circumference-calculator): Calculate circle circumference - [Radius of a Circle Calculator](https://www.calculatorsuite.com/math/radius-of-a-circle): Find circle radius from area or circumference - [Aspect Ratio Calculator](https://www.calculatorsuite.com/math/aspect-ratio-calculator): Calculate width, height and aspect ratio - [Rate of Change Calculator](https://www.calculatorsuite.com/math/rate-of-change-calculator): Calculate average rate of change over time - [Decimal to Percent Calculator](https://www.calculatorsuite.com/math/decimal-to-percent-calculator): Convert decimals to percentages instantly - [Fraction to Percent Calculator](https://www.calculatorsuite.com/math/fraction-to-percent-calculator): Convert fractions to percentages instantly ## Time & Date Calculators - [Days Calculator](https://www.calculatorsuite.com/time-date/days-calculator): Calculate number of days between two dates - [Hours Calculator](https://www.calculatorsuite.com/time-date/hours-calculator): Calculate time difference in hours between dates - [Time and Date Calculator](https://www.calculatorsuite.com/time-date/time-and-date-calculator): Add or subtract days, weeks, months and years from a date - [Countdown Timer](https://www.calculatorsuite.com/time-date/countdown-timer): Online countdown timer to any date - [Birthday Countdown](https://www.calculatorsuite.com/time-date/birthday-countdown): Countdown timer to your next birthday - [Christmas Countdown](https://www.calculatorsuite.com/time-date/christmas-countdown): Days until Christmas countdown clock - [New Years Countdown](https://www.calculatorsuite.com/time-date/new-years-countdown): Countdown to New Year's Eve - [Halloween Countdown](https://www.calculatorsuite.com/time-date/halloween-countdown): Days until Halloween countdown - [Thanksgiving Countdown](https://www.calculatorsuite.com/time-date/thanksgiving-countdown): Days until Thanksgiving countdown - [Black Friday Countdown](https://www.calculatorsuite.com/time-date/black-friday-countdown): Countdown to Black Friday - [Easter Countdown](https://www.calculatorsuite.com/time-date/easter-holiday-countdown): Days until Easter countdown - [Valentine's Day Countdown](https://www.calculatorsuite.com/time-date/valentines-day-countdown): Days until Valentine's Day - [Mother's Day Countdown](https://www.calculatorsuite.com/time-date/mothers-day-countdown): Countdown to Mother's Day - [Father's Day Countdown](https://www.calculatorsuite.com/time-date/fathers-day-countdown): Countdown to Father's Day - [Pregnancy Due Date Countdown](https://www.calculatorsuite.com/time-date/pregnancy-due-date-countdown): Countdown to baby due date - [Wedding Countdown](https://www.calculatorsuite.com/time-date/wedding-countdown): Live countdown to your wedding day - [Retirement Countdown](https://www.calculatorsuite.com/time-date/retirement-countdown): Countdown to your retirement date - [Vacation Countdown](https://www.calculatorsuite.com/time-date/vacation-countdown): Countdown to your next holiday - [Graduation Countdown](https://www.calculatorsuite.com/time-date/graduation-countdown): Days until graduation countdown - [World Cup Countdown](https://www.calculatorsuite.com/time-date/world-cup-countdown): Countdown to the 2026 World Cup - [Olympics Countdown](https://www.calculatorsuite.com/time-date/olympics-countdown): Countdown to the next Olympic Games - [Super Bowl Countdown](https://www.calculatorsuite.com/time-date/super-bowl-countdown): Days until the Super Bowl - [Chinese New Year Countdown](https://www.calculatorsuite.com/time-date/chinese-new-year-countdown): Countdown to Chinese New Year - [Diwali Countdown](https://www.calculatorsuite.com/time-date/diwali-countdown): Days until Diwali - [Ramadan Countdown](https://www.calculatorsuite.com/time-date/ramadan-countdown): Countdown to Ramadan - [Holi Countdown](https://www.calculatorsuite.com/time-date/holi-countdown): Days until Holi Festival - [St Patrick's Day Countdown](https://www.calculatorsuite.com/time-date/st-patricks-day-countdown): Countdown to St Patrick's Day - [Mardi Gras Countdown](https://www.calculatorsuite.com/time-date/mardi-gras-countdown): Days until Mardi Gras - [Groundhog Day Countdown](https://www.calculatorsuite.com/time-date/groundhog-day-countdown): Countdown to Groundhog Day - [Independence Day Countdown](https://www.calculatorsuite.com/time-date/independence-day-countdown): Countdown to July 4th Independence Day - [Guy Fawkes / Bonfire Night Countdown](https://www.calculatorsuite.com/time-date/guy-fawkes-bonfire-night-countdown): Days until Bonfire Night - [Formula 1 Countdown](https://www.calculatorsuite.com/time-date/formula-1-countdown): Live F1 season countdown - [NBA Countdown](https://www.calculatorsuite.com/time-date/nba-countdown): Countdown to NBA season start - [Cruise Countdown](https://www.calculatorsuite.com/time-date/cruise-countdown): Countdown to your next cruise - [Midnight Countdown](https://www.calculatorsuite.com/time-date/midnight-countdown): Live countdown to midnight - [5 Minute Countdown Timer](https://www.calculatorsuite.com/time-date/easy-5-minute-countdown-timer): Live 5-minute countdown clock - [10 Minute Countdown Timer](https://www.calculatorsuite.com/time-date/easy-10-minute-countdown-timer): Live 10-minute countdown clock - [15 Minute Countdown Timer](https://www.calculatorsuite.com/time-date/easy-15-minute-countdown-timer): Live 15-minute countdown clock - [20 Minute Countdown Timer](https://www.calculatorsuite.com/time-date/easy-20-minute-countdown-timer): Live 20-minute countdown clock - [30 Minute Countdown Timer](https://www.calculatorsuite.com/time-date/easy-30-minute-countdown-timer): Live 30-minute countdown clock ## Unit Conversion Tools - [KM to Miles](https://www.calculatorsuite.com/convert/distance/km-to-miles): Convert kilometers to miles instantly - [Miles to KM](https://www.calculatorsuite.com/convert/distance/miles-to-km): Convert miles to kilometers instantly - [Feet to Miles](https://www.calculatorsuite.com/convert/distance/feet-to-miles): Convert feet to miles or miles to feet - [CM to Inches](https://www.calculatorsuite.com/convert/length/cm-to-inches): Convert centimetres to inches - [Inches to CM](https://www.calculatorsuite.com/convert/length/inches-to-cm): Convert inches to centimetres - [CM to Feet and Inches](https://www.calculatorsuite.com/convert/length/cm-to-feet-and-inches): Convert centimetres to feet and inches - [Feet and Inches to CM](https://www.calculatorsuite.com/convert/length/feet-and-inches-to-cm): Convert feet and inches to centimetres - [Feet to Inches](https://www.calculatorsuite.com/convert/length/feet-to-inches): Convert feet to inches with chart - [Inches to Feet](https://www.calculatorsuite.com/convert/length/inches-to-feet): Convert inches to feet with chart - [KG to Pounds](https://www.calculatorsuite.com/convert/weight/kg-to-pounds): Convert kilograms to pounds - [Pounds to KG](https://www.calculatorsuite.com/convert/weight/pounds-to-kg): Convert pounds to kilograms - [KG to Stone](https://www.calculatorsuite.com/convert/weight/kg-to-stone): Convert kilograms to stone - [Stone to KG](https://www.calculatorsuite.com/convert/weight/stone-to-kg): Convert stone to kilograms with chart - [Celsius to Fahrenheit](https://www.calculatorsuite.com/convert/temperature/celsius-to-fahrenheit): Convert Celsius to Fahrenheit instantly - [Fahrenheit to Celsius](https://www.calculatorsuite.com/convert/temperature/fahrenheit-to-celsius): Convert Fahrenheit to Celsius instantly - [KPH to MPH](https://www.calculatorsuite.com/convert/speed/kph-to-mph): Convert kilometers per hour to miles per hour - [MPH to KPH](https://www.calculatorsuite.com/convert/speed/mph-to-kph): Convert miles per hour to kilometers per hour - [Gallons to Liters](https://www.calculatorsuite.com/convert/volume/gallons-to-liters): Convert gallons to liters - [Liters to Gallons](https://www.calculatorsuite.com/convert/volume/liters-to-gallons): Convert liters to gallons - [Liters to Quarts](https://www.calculatorsuite.com/convert/volume/liters-to-quarts): Convert liters to quarts - [Quarts to Liters](https://www.calculatorsuite.com/convert/volume/quarts-to-liters): Convert quarts to liters - [Roman Numerals Converter](https://www.calculatorsuite.com/convert/roman-numerals/roman-to-numbers): Convert Roman numerals to numbers ## Guides & Articles - [Compound Interest Explained](https://www.calculatorsuite.com/guides/compound-interest-explained): What compound interest is and why it matters - [Renting vs Buying a Home](https://www.calculatorsuite.com/guides/renting-vs-buying-a-home): Pros and cons of renting vs buying - [8 Hidden Costs of Buying a New Home](https://www.calculatorsuite.com/guides/8-hidden-costs-of-buying-a-new-home): Hidden homebuying costs to budget for - [Beginner's Guide to Increasing Your Credit Score](https://www.calculatorsuite.com/guides/beginners-guide-to-increasing-credit-score): How to improve your credit score - [Ultimate Guide to Credit Card Debt Consolidation](https://www.calculatorsuite.com/guides/ultimate-guide-to-credit-card-debt-consolidation): How to consolidate and eliminate credit card debt - [Best Tips to Save Money](https://www.calculatorsuite.com/guides/best-tips-to-save-money): 8 proven tips to save more money - [5 Tips for Getting an Auto Loan](https://www.calculatorsuite.com/guides/5-tips-for-getting-an-auto-loan): How to get the best auto loan deal - [Lose Weight in 30 Days](https://www.calculatorsuite.com/guides/lose-weight-in-30-days-tips-tricks-tools): Tips, tricks and tools for losing weight - [7 Essential Health & Fitness Calculators](https://www.calculatorsuite.com/guides/7-essential-health-fitness-calculators): Must-use health and fitness calculator tools