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Age Calculator
Exact age in years, months, days — plus your next-birthday countdown.
Date Difference Calculator
Find the years, months, and days between any two dates.
BMI Calculator
Calculate your Body Mass Index from your height and weight.
Calorie Calculator
Find your BMR and daily calorie needs for maintaining, losing, or gaining weight.
Water Intake Calculator
Estimate how much water you should drink each day based on weight and activity.
Pace Calculator
Find your running or walking pace per km/mile, and your speed.
Tip Calculator
Work out the tip, total bill, and per-person split.
Loan / EMI Calculator
Work out your monthly payment, total payment, and total interest.
Percentage Calculator
Find a percentage of a number, or the percentage change between two numbers.
Word Counter
Count words, characters, sentences, and paragraphs as you type.
Password Generator
Generate strong, random passwords — nothing leaves your browser.
Random Number Generator
Generate one or more random numbers in any range, with or without duplicates.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, or slug-case.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Length Converter
Convert between millimeters, meters, kilometers, inches, feet, and more.
GPA Calculator
Calculate your semester or cumulative GPA from credit hours and grades.
Discount Calculator
Find the sale price and how much you save on a percentage discount.
Sleep Cycle Calculator
Find the best times to go to bed or wake up, based on 90-minute sleep cycles.
Weight Converter
Convert between milligrams, grams, kilograms, tonnes, ounces, pounds, and stones.
BMR Calculator
Estimate your Basal Metabolic Rate using the Mifflin-St Jeor and Harris-Benedict equations.
Time Zone Converter
Convert a date and time between time zones, including UTC offsets and DST.
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Date & Time
Age, date difference, time zone, and countdown calculators.
Health
BMI, calorie, BMR, water intake, pace, and sleep calculators.
Finance
Tip, loan, and discount calculators.
Everyday
Percentage, GPA, password, text, and word tools.
Conversion
Temperature, length, and weight unit converters.