Online calculators to solve just about everything.

## Calendar, Date & Time Calculators

### Age Calculator

How old am I today? Age Calculator is a free online tool which calculates your age and tells you how old you are in years, months, days, hours and minutes.

### Days Between Two Dates Calculator

Days Between Two Dates Calculator. Find the number of years, months, weeks, and days between two dates.

### Leap Year Calculator

Online Leap Year Calculator - How to calculate leap year? What is a leap year, and when is the next leap year? Find out now!

### Sunrise-Sunset Calculator

Sunrise Sunset Calculator. Free online tool to calculate sunrise and sunset times for any date and any location.

### What day is it? Calculator

What day is it? Calculator. Would you like to know what day of the week you were born? Use our free online What day was it? Calculator.

### What’s the Current Week Number? Calculator

The What’s the Current Week Number? Calculator will tell you what week it is today and, of course, it also tells you whether the week is even or odd week.

### When is Friday the 13th? Calculator

When is the next Friday the 13th? Our Friday the 13th calculator helps you to find out when Friday the 13th is/was in any year.

## Health & Fitness Calculators

### Bicycle Frame Size Calculator

Bicycle Frame Size Calculator to find the perfect bike size you need. The Bike Size Calculator is super easy to use!

### Blood Pressure Calculator

Free, online Blood Pressure Calculator to find out the normal blood pressure. You can also find our easy-to-use Blood Press Chart by Age.

### BMI Calculator

The Body Mass Index (BMI) Calculator can be used to determine whether you are in a healthy weight range for your height.

### Body Surface Area Calculator

Body Surface Area Calculator for calculating body surface area with the four best methods: DuBois and DuBois, Haycock, Gehan and George, Mosteller.

### Diabetes Risk Calculator

The free Diabetes Risk Calculator calculates the risk of type 2 diabetes within a minute. See your Diabetes Risk Score now.

### Fat-Burning Heart Rate Calculator

Use our free online Fat-Burning Heart Rate Calculator for maximizing fat burning based on your gender and age.

### Ideal Weight Calculator

This free Ideal Weight Calculator estimates ideal bodyweight (IBW) based on the 6 most popular formulas.

### Waist-to-Hip Ratio Calculator

Our Waist-to-Hip Ratio Calculator helps you to determine your body shape and possible health risk category. Is your health at risk? Find out!

## Pregnancy Calculators

### Baby Eye Color Calculator

Baby Eye Color Calculator. Predict your baby's eye color instantly by selecting mom's and dad's eye colors.

### Blood Type Calculator

Our free online Blood Type Calculator uses the blood types of the parents to tell what blood type and Rh factor their future child might have.

### Pregnancy Due Date Calculator

Use the Pregnancy Due Date Calculator to estimate your due date and find out how far along you are.

## Financial Calculators

### Compound Interest Calculator

Compound Interest Calculator to determine how much your money can grow using the power of compound interest. Make your future now.

### Fuel Cost Calculator

Online Fuel Cost Calculator to estimate the fuel cost of a trip based on fuel efficiency, distance, and gas price using various units of measurement.

### Tip Calculator

Tip Calculator with split function. Calculate the tip amount for your bill. You can also split the cost between any number of people.

### VAT Calculator

Online VAT calculator -> add or remove VAT from a given price with one click.

## Math Calculators

### Circle Area & Circumference Calculator

Circle Area & Circle Circumference Calculator from radius or diameter. Our calculator computes circle circumference and area using various common units of measurement."

### Cylinder Volume and Surface Area Calculator

Cylinder Volume Calculator + Cylinder Surface Area Calculator. Calculate the volume and the surface area of a cylinder in no time.

### Decimal to Fraction Calculator

Thanks to our Decimal to Fraction Calculator, Converting a decimal to a fraction is super-easy. See for yourself.

### Fraction Calculator

Free online Fraction Calculator to add, subtract, divide, and multiply fractions with a step-by-step explanation.

### Greatest Common Divisor Calculator

Greatest Common Divisor Calculator allows you to easily calculate the GCD of two or more numbers. GCD Calculation online

### Online Basic Calculator

Basic online calculator to quickly and easily perform the most common mathematical operations such as multiplication, division, addition, subtraction.

### Percentage Calculator

Percentage Calculator is a free online tool to calculate percentages. What is X% of Y? X is what percent of Y?

### Percentage Increase Calculator

Thanks to the Percentage Increase Calculator, you can easily find out the increase from one value to another in terms of a percentage.

### Scientific Calculator

Use this free online Scientific Calculator to quickly and easily perform the most common mathematical operations and also complex scientific calculations.

## Other Calculators

### Alcohol Dilution Calculator

Alcohol Dilution Calculator to easily calculate online how much water is needed to reach the desired lower alcoholic strength.

### BAC Calculator

Online BAC Calculator estimates your blood alcohol level. Blood Alcohol Content Calculator to know when you’ll be sober again.

### Biorhythm Calculator

Online Biorhythm Calculator with the most extras. For everyone who wants to know their current levels. Free Biorhythm Calculator!

### Character and Word Counter Calculator

Online Character Counter & Word Counter tool to easily find out how many characters and words have in the text.

### Download Time Calculator

The ultimate Download Time Calculator is used to estimate how long it will take to download any file based on your download speed.

### Infrared Heater Calculator

Infrared Heater Calculator to easily calculate the size of infrared heater required to heat your room. Free, fast and easy calculation.

### Is there life on other planets? Calculator

Is there life on other planets or are we alone in the universe? Find out now with our Extraterrestrial Calculator using the Drake equation.

### Poker Hand Range Calculator

Online Poker hand range calculator: The odds are instantly calculated and displayed. Great tool for improving Texas Hold’em strategy.

### PSN Trophy Level Calculator

Playstation Trophy Level Calculator to find out your PSN Trophy Level. Our calculator tells you how many trophies needed for the next level.

### Resistor Color Code Calculator

Resistor Color Code Calculator that makes identifying resistance and tolerance values for 4, 5, and 6 band resistors super simple.

### Room Heating Calculator

Room heating calculator. For an estimate of how much heat you need for a room in kW or BTU. Find your room’s BTU requirement now.

### Tile Calculator

Tile Calculator – a simple and easy way for estimating the number of tiles required to cover an area.

### Wind Chill Calculator

Ultimate Wind Chill Calculator with the new wind chill algorithm. Calculate the feels like temperature in cold and wind now. ✅

### Zodiac Sign Calculator

Online Zodiac Sign Calculator for quick and easy determination of your zodiac sign. Calculation with astrological signs characteristics.