Free Online Tools & Calculators

Calculate how your savings grow with compound interest over time.

Calculate monthly mortgage payments, total cost, and amortization.

Calculate monthly repayments and total interest for any loan.

Calculate tip amount and split the bill among friends.

Add or remove VAT/tax from any price instantly.

Calculate sale price after a percentage or flat discount.

Calculate the inflation-adjusted value of money over time using historical US CPI data.

Calculate your Financial Independence number and how many years until you can retire early.

Calculate how long to reach your savings goal, or how much you need to save each month.

Calculate how long to pay off credit card debt and how much interest you can save by paying more.

Calculate your Body Mass Index and see what category you fall in.

Calculate your Basal Metabolic Rate — calories burned at rest.

Find percentages, percentage change, and percentage of totals.

Full scientific calculator with trig, logs, and more.

Generate random numbers within any range, with or without duplicates.

Convert between meters, feet, miles, km, inches, and more.

Convert between kg, lbs, stones, ounces, and more.

Convert between Celsius, Fahrenheit, and Kelvin.

Convert between 50+ world currencies with live exchange rates.

Calculate exact age in years, months, and days from birthdate.

Find the number of days, weeks, or months between two dates.

See the current time in major cities and timezones around the world.

Convert a specific date and time between any two timezones.

Count down to any future date or event with days, hours, minutes, and seconds.

Scale any recipe up or down by servings count.

Convert cups, tablespoons, teaspoons, ml, oz, and grams.

Calculate area of rectangles, circles, triangles, and more.

Calculate flooring, tile or carpet needed for any room with waste factor.

Calculate roof area, squares, shingles, and underlayment for any roof shape.

Calculate drywall sheets, screws, joint compound, and tape for any room.

Find your public IP address, location, ISP, and connection info.

Calculate subnet mask, network address, broadcast, and host range.

Look up DNS records (A, AAAA, MX, TXT, CNAME) for any domain.

Generate secure random passwords with custom rules and strength meter.

Convert colors between HEX, RGB, HSL, HSB, and CMYK formats.

Count words, characters, sentences, reading time and analyze text.

Compare price per unit to find the best value product.

Find out which generation you belong to based on your birth year.

Convert your pet's age to human years — dogs, cats, rabbits, hamsters, guinea pigs, parrots, horses, and tortoises.

Calculate your daily water intake based on weight, activity and climate.

Calculate calories burned during 50+ activities using MET values.

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

Check your blood pressure category and understand what it means for your health.

Estimate your Blood Alcohol Content using the Widmark formula.

Calculate your waist-to-hip ratio and health risk category using WHO standards.

Convert Unix timestamps to dates and back, with live current timestamp.

Count business days between dates or add working days to a date.

Calculate your estimated due date from your last period, conception date, or IVF transfer.

Find the best bedtime or wake time based on 90-minute sleep cycles.

Estimate your VO2 max fitness level using multiple test methods.

Calculate your 1RM from any weight and rep count using multiple formulas.

Find out your love compatibility percentage — just for fun!