Online calculator is a free converter, free service of metric, imperial measure systems and other measurements that are known today. You can do necessary conversions or other calculations, and find thousands of units, definitions and formulas by using this service. Besides, a lot of conversion tables of different units are presented in it. It is easy and convenient to use online converter, you can move to the required page, choose the type of conversion specified below, and perform necessary calculations with one click.

### Length and distance

Metric and English systems of length measures are converted to meters, centimeters, inches, feet, yards, kilometers, miles, millimeters, nautical miles and other values.

### Weight and mass

It is measured by metric and English units of weight, such as pound, kilogram, gram, ounce, carat, ton, stone, ......

### Temperature

Celsius, Fahrenheit, Kelvin, Reaumur and Rankin. It includes charts, formulas and definitions.

### Pressure

It converted into many units of pressure, such as atmospheres, bars, Pascals, KPa (kPa), pounds per square inch, Torrs, ...

### Speed

In metric and English measurement systems, speed is determined by meter per second, foot per minute, kilometers per hour, miles per hour, inch per second, knot, ...

### Fuel efficiency

Fuel efficiency is a form of thermal efficiency of the heat engine. Overall fuel efficiency may vary per device.

### Energy

In physics, energy is an indirectly observed physical quantity, also is one of the basic quantitative properties that describes the object’s state or a physical system.

### Volume and capacity

Metric and English units of volume are converted to liters, gallons, cups, quarts, ounces, cubic meters, cubic feet, etc.

### Wave frequency

Frequency is the number of occurrences per a certain unit time; it is also referred to as «temporal frequency».

### Power

In physics, power is the amount with which energy is used, transferred or transformed. The SI unit of power is Watt.

### Torque

Torque or moment of force is the tendency of a force to rotate an object about an axis, fulcrum, or pivot.

### Units of storage

Digital data storage is a computer technology which is a non-SI quantitative value. Computer information presented in numerical forms «1» and «0» in different types of storages.

### Angle

An angle is the figure formed by two rays, called the side of the angle, sharing a common endpoint, called the vertex of the angle.