More Free Tools

Calculate your exact age in years, months, and days. See total days lived, hours, your zodiac sign, and days until your next birthday.

Calculate percentages instantly. Find what percent X is of Y, calculate percent change, and work out percentage increases or decreases.

Calculate the final price after a discount. Enter the original price and discount percentage to see your savings instantly.

Calculate the tip on any bill. Split between multiple people and choose your tip percentage. Instant results, no sign-up needed.

Full scientific calculator with trigonometry, logarithms, powers, roots, and memory functions. Works entirely in your browser.

Calculate how your investment grows with compound interest. See the final balance, total interest earned, and year-by-year breakdown.

Calculate your monthly loan payment, total interest, and total repayment amount for any loan amount, rate, and term.

Calculate your monthly mortgage payment including principal and interest. Enter home price, down payment, rate, and loan term.

Find out how much you need to save each month to reach your financial goal. Includes interest rate and existing savings.

Calculate your Body Mass Index (BMI) using height and weight in metric or imperial units. See your BMI category and healthy range.

Calculate your daily calorie needs (TDEE) based on age, gender, height, weight, and activity level. Includes weight loss and gain targets.

Calculate your estimated pregnancy due date from your last menstrual period. See key milestones and trimester dates.

Calculate your ideal body weight based on height and gender using four established medical formulas including Devine and Robinson.

Calculate your GPA by adding courses with grades and credit hours. Supports both letter grades and 4.0 scale inputs.

Find out what grade you need on your final exam to reach your target grade. Enter your current grade and the weight of the final.

Calculate total hours worked from start and end times. Add break time, multiple shifts, and an optional hourly rate for pay.

Calculate the exact number of days, weeks, months, and years between any two dates.

Find how many days until any event - Christmas, New Year, a birthday, or any custom date.

Convert numbers to Roman numerals and Roman numerals back to numbers. Supports 1 to 3,999.

Add, subtract, multiply, and divide fractions. Results are automatically simplified to lowest terms.

Simplify ratios, scale them up or down, and find a missing value in a proportion.

Calculate mean, median, mode, range, sum, and count for any set of numbers.

Calculate how much you need to save for retirement and whether your current savings are on track.

See how long it takes to pay off a debt and how much interest you pay at different monthly amounts.

Estimate your body fat percentage using the US Navy method. Supports metric and imperial units.

Calculate your estimated ovulation date and fertile window based on your cycle length and last period.

Estimate your blood alcohol content (BAC) based on drinks, weight, gender, and time elapsed.

Calculate the fuel cost for any trip based on distance, fuel efficiency, and gas price.

Compare two or more products by price per unit to find the best value. Great for grocery shopping.

Convert colors between HEX, RGB, HSL, and HSB formats instantly with a live color preview.

Generate random colors with their HEX, RGB, and HSL values. Copy any format instantly.

Generate a QR code from any URL or text. Download as PNG instantly. Free, private, no sign-up.

Generate harmonious color palettes from any base color. Complementary, analogous, triadic, and more.

Roll any number of dice in any combination - d4, d6, d8, d10, d12, and d20. Instant results.

Flip a virtual coin and get heads or tails instantly. Flip multiple coins at once.

Get a random inspirational quote with one click. Hundreds of famous quotes from history's greatest minds.

Generate random numbers within any range. Generate multiple numbers and optionally keep them unique.

Can't decide? Get a random yes or no answer instantly. Includes a maybe option for tough decisions.

Test every key on your keyboard online. Choose from Windows full, TKL, 75%, 65%, 60%, Mac, and MacBook layouts.

Check your monitor for dead or stuck pixels using solid color screens. Red, green, blue, black, white, and more.

Unscramble letters to find valid Scrabble and Words With Friends words. Supports wildcards and blank tiles.

Solve jumble word puzzles instantly. Enter the scrambled letters and find all possible words.

Free online alarm clock. Set an alarm time and get a browser alert and sound when it goes off.

Free countdown timer. Set hours, minutes, and seconds and get an alert when the time is up.

Free online stopwatch with lap times. Start, stop, and reset with a single click.

Convert time between any two cities or time zones instantly. Great for scheduling across countries.

Calculate the best time to go to sleep or wake up based on 90-minute sleep cycles.

Add names, spin the wheel, and let it decide. Great for random picks, giveaways, and classroom activities.