🟢 Beginner Calculators

Convert acres to hectares and hectares to acres. Used in land measurement and real estate worldwide.…

Convert amps to watts using voltage. Calculate power consumption from current and voltage for any el…

Convert bar to PSI and PSI to bar instantly. Essential for tire pressure, hydraulics, and gas pressu…

Convert binary numbers to decimal and decimal to binary instantly. Supports up to 64-bit numbers. Th…

Convert BTU/hr to watts and watts to BTU/hr. Used for air conditioning, heating, and appliance energ…

Convert temperatures between Celsius, Fahrenheit, and Kelvin. Instant temperature conversion calcula…

Convert centimeters to inches and inches to centimeters. Quick and accurate length conversion. Use t…

Convert any decimal number to a simplified fraction instantly. Shows step-by-step conversion using G…

Convert women's dress sizes between US, UK, EU, FR/ES, IT, and AU/NZ instantly. Try this free online…

Convert Fahrenheit to Celsius and Kelvin instantly. Accurate temperature conversion calculator. Use …

Convert feet to meters and meters to feet. Also handles feet and inches to centimeters. This free on…

Convert US gallons to liters and liters to gallons instantly. Accurate volume conversion with a refe…

Convert hectares to acres and acres to hectares. Essential for land measurement and real estate comp…

Convert HEX color codes to RGB values instantly. Perfect for web development, CSS, and digital desig…

Convert inches to centimeters instantly. Simple, accurate length conversion calculator. This free on…

Convert kilograms to pounds and pounds to kilograms. Quick, accurate weight conversion calculator. T…

Convert kilograms to stone and stone to kg. Ideal for body weight conversion between metric and Brit…

Convert kilometers to miles and miles to kilometers instantly. Includes common distance conversions …

Convert kilometers per hour to miles per hour and mph to kph instantly. Useful for speed, driving, a…

Convert pounds to kilograms instantly. Quick, accurate weight conversion calculator. Try this free o…

Convert liters to gallons (US and UK) and gallons to liters instantly. This free online converter gi…

Convert liters to US pints and pints to liters. Quick and accurate volume conversion for cooking and…

Convert meters to feet and inches instantly. Accurate length conversion calculator. Try this free on…

Convert meters to yards and yards to meters instantly. Essential for sports, fabric, and constructio…

Convert miles to kilometers instantly. Quick and accurate distance conversion calculator. Use this f…

Convert milliliters to fluid ounces instantly. Quick volume conversion calculator. Try this free onl…

Convert milliliters to tablespoons and tablespoons to ml. Perfect for cooking and recipe conversions…

Convert millimeters to inches instantly. Precise length conversion calculator. Try this free online …

Convert miles per hour to kilometers per hour and vice versa. Quick speed unit conversion calculator…

Convert nautical miles to kilometers and km to nautical miles. Used in aviation and maritime navigat…

Convert ounces to grams and grams to ounces instantly. Covers both avoirdupois and troy ounces. Use …

Convert US pints to liters and liters to pints instantly. Includes US and UK pint references. Use th…

Convert PSI to bar and bar to PSI instantly. Perfect for tire pressure, hydraulics, and fluid system…

Convert RGB color values to HEX codes instantly. Essential for web design, CSS, and graphic design. …

Convert shoe sizes between US, EU, UK, and CM measurements. This free online calculator gives you in…

Convert square meters to square feet and vice versa. Essential for real estate and construction. Use…

Convert stone to kilograms and kg to stone instantly. Used for body weight in the UK and Ireland. Th…

Convert tablespoons to milliliters and ml to tablespoons. Useful for cooking and baking recipe conve…

Convert watts to amps using voltage (AC/DC). Calculate current from power and voltage for electrical…

Convert yards to meters and meters to yards quickly. Includes a reference table for common distances…

Track your daily caffeine intake and estimate when it will wear off. This free online cooking tool g…

Convert between cups, tablespoons, teaspoons, ml, and other cooking measurements. Try this free onli…

Convert cups to milliliters and mL to cups. US, metric, and imperial cup conversions for cooking. Tr…

Add or subtract any number of days to a date. Find the resulting date and day of the week instantly.…

Calculate your exact age in years, months, days, hours, and minutes. Find out how many days you've b…

Calculate the exact age difference between two people in years, months, and days. This free online d…

Find out what day of the week you were born on and what day your next birthday falls on. Use this fr…

Count the number of business days (weekdays) between two dates, excluding weekends. Try this free on…

Calculate the number of days, weeks, months, and years between two dates. Find the exact duration be…

Calculate how many days until a specific date. Countdown to birthdays, holidays, events, and deadlin…

Add or subtract hours, minutes, and seconds from any time. Get the resulting time instantly. Use thi…

Calculate the duration between two times or add/subtract hours, minutes, and seconds from a time. Us…

Convert time between time zones. See what time it is anywhere in the world right now. Try this free …

Calculate the number of weeks between two dates or find a date a certain number of weeks from now. U…

Find your correct bra size by entering your band and bust measurements. Get your size in US, UK, and…

Convert your cats age to human years. Cats age faster in their first two years. Use this free online…

Convert your dogs age to human years using the latest scientific research. Try this free online tool…

Calculate your weighted average grade from multiple assignments and their weights. This free tool de…

Calculate total hours worked between start and end times, with break deduction. Use this free online…

Fun love compatibility calculator! Enter two names and see your love match percentage. Just for ente…

Generate strong, random passwords of any length. Customize with uppercase, lowercase, numbers, and s…

Convert your pet's age to human years for cats, dogs, rabbits, guinea pigs, and hamsters. This free …

Find your ring size from finger circumference or diameter. Convert between US, UK, and EU ring size …

Count words, characters, sentences, and paragraphs in your text. Estimate reading time and speaking …

Calculate how many yards of fabric you need for sewing and crafting projects. Use this free online t…

Calculate total hours worked and weekly pay from time card entries with overtime. This free tool del…

Calculate your monthly budget balance. Enter your income and total expenses to see your remaining fu…

Calculate the cost per unit of any product or service. Compare prices to find the best value. This f…

Calculate sale prices and savings. Enter original price and discount percentage to find the final pr…

Calculate trading margin, profit margin percentage, markup, and gross profit for any product or trad…

Calculate selling price from cost and markup percentage. Find the right price for your products. Thi…

Calculate your monthly mortgage payment including principal and interest. See how much house you can…

Calculate profit margin, gross profit, and markup from revenue and cost. Essential business calculat…

Find out how much rent you can afford based on your income using the 30% rule. Try this free online …

Calculate sales tax amount and total price including tax. This free online calculator gives you inst…

Calculate simple interest, total amount owed or earned, and interest accrued over any period. This f…

Calculate tip amount and split the bill. Enter bill total, tip percentage, and number of people to s…

Calculate alcohol units in your drinks based on volume and ABV. Track weekly intake against health g…

Find your baby's weight percentile based on age and gender using WHO growth standards. Track healthy…

Estimate Blood Alcohol Concentration (BAC) with the Widmark formula. See DUI legal limits by US stat…

Calculate your Blood Alcohol Content (BAC) based on drinks consumed, body weight, and time. Know whe…

Check your blood pressure reading and understand what your systolic and diastolic numbers mean. Find…

Free BMI calculator. Check if your weight is underweight, normal, overweight, or obese per WHO stand…

Calculate the daily calorie deficit needed to reach your goal weight in your target timeframe. Based…

Calculate BMI for children and teens aged 2–19 with CDC growth chart percentile. Get age- and sex-sp…

Free calorie calculator using the Mifflin-St Jeor equation. Adjusts for activity level to compute yo…

Calculate how much protein you need daily based on your weight, goal, and activity level. Use this f…

Calculate how much water you should drink daily based on your weight and activity level. Use this fr…

Calculate your estimated due date based on your last menstrual period or conception date. Find out h…

Estimate how long you need to recover between workouts based on exercise intensity, type, and your f…

Calculate your target heart rate zones for training. Based on your age and resting heart rate using …

Find your ideal body weight using multiple formulas (Devine, Robinson, Miller, Hamwi). Enter your he…

Estimate your most fertile days and ovulation date based on your menstrual cycle. Try this free onli…

Predict your next period date based on your last menstrual period and average cycle length. Free men…

Calculate your estimated due date based on the first day of your last menstrual period (LMP). Also s…

Find out exactly how many weeks pregnant you are based on your last menstrual period. Track your tri…

Calculate recommended weight gain during pregnancy based on your pre-pregnancy BMI and current week …

Free running pace calculator. Converts between pace (min/km, min/mile), speed (km/h, mph), and finis…

Convert running pace between min/km and min/mile instantly. Calculate your race finish time or targe…

Find the best time to sleep or wake up based on sleep cycles of 90 minutes. Use this free online fit…

Estimate calories burned from walking based on steps, weight, and pace. Use this free online fitness…

Calculate calories burned walking based on your weight, pace, and duration. Includes options for fla…

Calculate the absolute value of any number or expression. |x| returns the non-negative magnitude. Th…

Calculate the mean, median, mode, and range of any list of numbers instantly. Enter comma-separated …

Calculate powers and exponents. Find the result of any base raised to any power. This free online ma…

Calculate the factorial of any non-negative integer. n! = n × (n-1) × … × 2 × 1. This free online ma…

Add, subtract, multiply, and divide fractions. Get results as fractions and decimals. Simplify fract…

Calculate your Grade Point Average. Enter your grades and credit hours to get your weighted GPA. Use…

Convert hexadecimal to decimal and decimal to hexadecimal. Supports hex color codes too. Use this fr…

Perform long division step-by-step. Enter a dividend and divisor to get the quotient, remainder, and…

Calculate mean, median, mode, range, and other statistics for any data set. Use this free online mat…

Multiply two or more numbers instantly. Shows the product and step-by-step multiplication. Use this …

Free percentage calculator. Compute X% of Y, X as % of Y, percentage change, and add/remove a percen…

Calculate the percentage increase or decrease between two values. Find percentage change, difference…

Check if a number is prime and find its factors. Use this free prime checker to instantly test any n…

Generate random numbers within a range. Perfect for games, decisions, and statistics. Try this free …

Solve ratio proportions and find missing values. If A:B = C:X, find X. This free online calculator g…

Round any number to a specified number of decimal places. Choose standard, ceiling, or floor roundin…

Calculate the square root of any number instantly. Also shows cube root and nth root calculations. T…

Calculate your required half marathon pace for any goal finish time. Get per-km, per-mile pace and m…

Calculate your required marathon pace for any goal finish time. Get per-km, per-mile pace and key sp…

Calculate the exact pace per km and per mile needed to finish any race in your goal time. Perfect fo…

Calculate your effective pace using Jeff Galloway's run-walk-run method. Enter your running pace and…

Convert treadmill speed (mph or km/h) to running pace (min/km or min/mile). Includes incline adjustm…