Free Online Tools & Calculators

Calculate your exact age in years, months, days, and hours from your date of birth.

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

Count down to any future date or event. Share your countdown with a link.

Convert Unix timestamps to readable dates and vice versa. Supports seconds and milliseconds.

Calculate days between dates, add or subtract time from a date, and find the day of the week.

See the current time in major cities worldwide. Compare time zones at a glance. Auto-updates every second.

Convert a specific time from one time zone to another. Handles daylight saving time automatically.

Count business days between two dates or find a date that is N working days away. Excludes weekends.

Pick any color and get HEX, RGB, HSL, and HSB values instantly.

Generate strong, random passwords. Customize length, symbols, numbers, and more.

Generate QR codes for URLs, text, WiFi, email, and more. Download as PNG.

Format, validate, and minify JSON. Instantly spot syntax errors.

Encode any text to Base64 or decode Base64 strings back to plain text.

Encode special characters in URLs or decode percent-encoded URLs.

Generate random UUIDs (v4). Bulk generate up to 100 at once. One-click copy.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.

Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words.

Convert any title or phrase into a clean, SEO-friendly URL slug.

Convert numbers between binary, octal, decimal, and hexadecimal.

Write Markdown and see a live rendered preview. Supports headings, tables, code blocks, bold, italic, and links.

Test regular expressions with live match highlighting, capture group details, and common pattern library.

Convert text to binary, hex, octal, or decimal — and back. Supports ASCII and UTF-8 encoding.

Calculate tip amount and split the bill between any number of people.

Calculate your monthly mortgage payment, total interest paid, and full amortization schedule.

Calculate the sale price after a discount. Find out how much you save.

Visualize how your money grows with compound interest over time.

Convert annual salary to hourly, daily, weekly, and monthly rates.

Calculate how long to pay off any loan and how much interest you will pay in total.

See how long it takes to pay off your credit card and how to save on interest.

Add or remove VAT and sales tax from any price. Supports any tax rate.

Find out how much to save each month to reach your financial goal.

Calculate your monthly car payment, total interest, and true cost of a vehicle loan.

Project your retirement savings based on contributions, returns, and years to retirement.

Estimate your net salary after federal tax, state tax, Social Security, and Medicare.

Calculate the hourly rate you need to charge as a freelancer to hit your income goal.

Find your break-even point in units and revenue. Essential for pricing and business planning.

Calculate your Body Mass Index and find out if you are underweight, normal, overweight, or obese.

Calculate your Total Daily Energy Expenditure based on activity level and body stats.

Find the daily calorie deficit you need to lose weight at your target pace.

Calculate your daily protein, carbs, and fat targets based on your goals.

Calculate pace, speed, and finish time for any running distance.

Find the best times to wake up or go to sleep based on 90-minute sleep cycles.

Estimate your 1RM for any lift using weight and reps. Includes percentage table.

Calculate your recommended daily water intake based on weight and activity level.

Find your 5 heart rate training zones based on your age and resting heart rate.

Calculate percentages instantly. What is X% of Y? X is what percent of Y? And more.

Add, subtract, multiply, and divide fractions. Automatically simplifies results.

Calculate mean, median, mode, range, variance, and standard deviation from a data set.

Convert numbers to Roman numerals and Roman numerals back to numbers.

Calculate the Greatest Common Divisor and Least Common Multiple of two or more numbers with prime factorization.

Solve ax² + bx + c = 0. Shows real and complex roots, discriminant, vertex, and parabola properties.

Find any side of a right triangle using a² + b² = c². Shows angles, area, and perimeter.

Check if a number is prime, find its prime factors, or generate all primes up to any limit.

Full scientific calculator with trig, log, powers, roots, factorial, π, e, and calculation history.

Generate random numbers within any range. Single or multiple numbers, no repeats option.

Flip a virtual coin. Get heads or tails instantly. Flip multiple times and track statistics.

Count words, characters, sentences, and paragraphs. Get reading time estimates.

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.

Count characters for Twitter/X, LinkedIn, Instagram and other social media platforms.

Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly.

Convert between pounds, kilograms, ounces, grams, stones, and more.

Convert between meters, feet, inches, miles, kilometers, and more length units.

Convert between liters, gallons, cups, fluid ounces, milliliters, and more.

Convert between mph, km/h, m/s, knots, and more speed units.

Convert between bits, bytes, KB, MB, GB, TB, and beyond.

Convert between square meters, square feet, acres, hectares, and more area units.

Convert between pascals, bar, PSI, atmospheres, mmHg, kPa, and more pressure units.

Convert between joules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, and electron-volts.

Convert between MPG (US/UK), L/100km, km/L, and miles per liter fuel economy units.