Search Calculators

Find out what day of the week any date falls on. Perfect for birthdays, historical events, or planning future dates.

Calculate the exact number of days between any two dates. Great for planning events, tracking deadlines, or counting down.

Add or subtract days, weeks, or months from any date. Perfect for calculating deadlines, due dates, and future events.

Calculate business days between two dates, excluding weekends and holidays. Essential for project planning and deadlines.

Find out how many days, weeks, and weekends are left in the current year. Track your progress through the year.

Count down to Christmas Day with a live timer showing days, hours, minutes, and seconds until December 25th.

Count down to Thanksgiving with a live timer. Find out exactly when Thanksgiving is this year.

Count down to Halloween with a live timer. Find out exactly when October 31st arrives.

Count down to New Year's Day with a live timer. See how much time is left in the year.

Count down to Valentine's Day with a live timer. Perfect for planning romantic surprises.

Calculate your exact age in years, months, days, hours, minutes, and seconds. Discover how many days you've been alive.

Count down to your next birthday with a live timer. See exactly how many days, hours, minutes, and seconds until your special day.

Find out exactly how many days, hours, and minutes you've been alive. Discover fascinating life statistics.

Find out what day of the week you were born on. Discover your birthday weekday and fun facts about it.

Find out which generation you belong to based on your birth year. Learn about Gen Z, Millennials, Gen X, and more.

Use our free mortgage calculator to estimate your monthly payment, including principal, interest, property taxes, homeowners insurance, PMI, and HOA fees. Enter your loan amount, interest rate, and loan term to see your total monthly housing payment and lifetime loan cost.

Estimate how much house you can afford based on your income, debts, down payment, and interest rate using the 28/36 guideline. This is an estimator for planning purposes only and does not determine mortgage eligibility.

Calculate how quickly you can pay off your mortgage with extra payments. See total interest savings.

Compare renting vs. buying a home over your desired timeframe. Account for mortgage, taxes, insurance, maintenance, rent increases, home appreciation, and investment returns. Transparent assumptions, no hidden costs.

Calculate compound interest and investment growth with our free calculator. Enter your starting balance, monthly contributions, interest rate, and time period to see how your investments grow. Includes yearly breakdown and comparison of compound vs. simple interest.

Calculate monthly loan payments for any type of loan. See total interest and payoff timeline.

Calculate car loan payments, total interest, and see if you can afford that vehicle.

Calculate how long it will take to pay off credit card debt and how much interest you will pay. Enter your current balance, interest rate, and monthly payment to see your estimated payoff timeline and total interest cost.

Estimate when your savings and investments will reach $1,000,000 based on your current savings, monthly contributions, and expected investment returns.

Calculate your retirement savings needs based on your current age, savings, contributions, and expected investment returns. This calculator projects your retirement balance and estimates retirement income using the 4% rule.

Convert hourly wages to annual salary and vice versa. See weekly, biweekly, and monthly earnings.

Convert annual salary to hourly wage. See what your yearly salary equals per hour.

Calculate overtime pay and total earnings with time-and-a-half or double-time rates.

Calculate tips quickly and easily. Split bills among multiple people and see total with tip.

Find out how many hours, minutes, and seconds you've been alive. Discover your life in time units.

Estimate how many times your heart has beaten since you were born. A fascinating life statistic.

Calculate how much time you've spent sleeping in your lifetime. See days, weeks, and years asleep.

Estimate how many pizzas you've eaten in your lifetime based on your age and eating habits.

Calculate how much coffee you've consumed in your lifetime. See cups, gallons, and cost.

Calculate how much money you've spent on coffee in your lifetime. You might be surprised!

A humorous calculator that generates a fictional "end of the world" date based on your answers to silly questions. For entertainment only!

Calculate percentages for all common scenarios. Find what percent one number is of another, calculate percentage increases and decreases (like salary raises or price markups), determine the original amount when you know the percentage, and solve percentage word problems. Works for grades, finances, statistics, tips, and everyday math.

Calculate how much you save with any discount percentage. Enter the original price and discount to instantly see your savings and the final price you pay. Perfect for comparing deals, understanding "percent off" sales, and calculating actual costs during shopping and online purchases.

Calculate sales tax quickly for any purchase. Enter the pre-tax price and your local tax rate to see the total cost with tax included. Also works in reverse—enter your total payment to extract the pre-tax price and tax amount. Essential for budgeting and understanding your actual costs at checkout.

Convert temperatures between Fahrenheit and Celsius instantly. Essential for understanding weather forecasts, cooking international recipes, scientific measurements, and travel. Works both directions—enter a temperature in either scale and instantly see the conversion.

Convert miles to kilometers and vice versa instantly. Essential for international travel, understanding road distances, comparing running/marathon distances, and working with foreign maps. Works both directions—enter a distance in miles or kilometers and instantly see the conversion.

Create your own decision wheel with custom options. Perfect for making choices, picking team members, choosing meals, or any decision-making situation. Add, edit, or remove options, then spin the wheel for a random selection.

Need help making a decision? Use our random choice generator to pick one or multiple options from your list. Perfect for choosing dinner, selecting team members, or breaking ties. Add your own options and let randomness decide!

Experience extreme time dilation with this Interstellar-inspired calculator. Convert between Miller's Planet time and Earth time using the movie's famous 1-hour-to-7-years scenario. Explore how gravitational time dilation works near Gargantua.

Find months with three paychecks. For bi-weekly employees, this calculator identifies which months have three paydays, helping you plan for extra savings or expenses.

Calculate how long it takes for a home coffee machine to pay for itself vs. café coffee. See your annual and long-term savings.

Discover your life milestones in days. Calculate when you'll reach 5,000, 10,000, 15,000 and more significant day milestones.

Plan your Christmas savings based on your actual payday schedule. Calculate how much to save each paycheck to reach your holiday goal.

Calculate night-shift pay including differential pay. Add overtime and see your weekly, biweekly, and annual earnings.

Calculate biweekly overtime pay with separate calculations for each week. See your gross pay including overtime rates.

Track police and emergency services overtime hours, cash payments, and comp time earned. Track by category with monthly caps.

Discover how much of your lifetime you'll spend on screens. Calculate by device type and explore reduction scenarios.

Calculate your total commute time and cost over your remaining working years. Includes fuel and tolls.

Calculate days elapsed since historical events or enter your own date. See years, months, days, and anniversaries.

Explore population trends by country using World Bank data. Calculate growth rates and changes over time.

Calculate the probability of at least one failure across multiple opportunities. An educational probability and entertainment tool.

Pick one or multiple names randomly from your list. Perfect for drawing names, selecting team members, or making decisions.

Randomly divide people into balanced teams. Perfect for group activities, sports, or project teams.

Can't decide what to eat? Use our dinner picker to randomly choose from your custom list or popular presets.