Unit.Conv

Free Online Unit Converter

Convert between units of length, weight, temperature, volume, and more. Fast, accurate, and easy to use.

0.393701
1 cm = 0.393701 in

Popular Conversions

kg → lbs→cm → in→°C → °F→km → mi→L → gal→mi → km→m → ft→lbs → kg→in → cm→ac → ha→bar → psi→mph → km/h→

All Categories

📏

Length

Convert between metric and imperial length units including centimeters, meters, inches, feet, miles, and more.

15+ units
⚖️

Weight

Convert between kilograms, pounds, ounces, grams, stones, and other mass and weight units.

12+ units
🧪

Volume

Convert between liters, gallons, cups, milliliters, fluid ounces, and other volume units.

14+ units
📐

Area

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

10+ units
🔧

Pressure

Convert between pascals, PSI, bar, atmospheres, and other pressure measurement units.

8+ units
🚀

Speed

Convert between miles per hour, kilometers per hour, knots, meters per second, and other speed units.

7+ units
🌡️

Temperature

Convert between Celsius, Fahrenheit, and Kelvin temperature scales with precise formulas.

3+ units
⚡

Energy

Convert between joules, calories, kilocalories, kilowatt-hours, BTU, newton-meters, and other energy units.

12+ units
⏱️

Time

Convert between seconds, minutes, hours, days, weeks, months, years, milliseconds, and other time units.

10+ units
🔌

Power

Convert between watts, kilowatts, megawatts, horsepower, BTU/h, kVA, and other power units.

10+ units
💪

Force

Convert between newtons, kilonewtons, kilogram-force, pound-force, dynes, and other force measurement units.

8+ units
💾

Data Storage

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and other digital storage units.

8+ units
📡

Frequency

Convert between hertz, kilohertz, megahertz, gigahertz, RPM, and other frequency units.

5+ units
🔩

Torque

Convert between newton-meters, kilonewton-meters, foot-pounds, inch-pounds, and other torque units.

7+ units
⚡

Electric Current

Convert between amperes, milliamperes, microamperes, kiloamperes, and other electric current units.

4+ units
🌊

Flow Rate

Convert between liters per minute, cubic meters per hour, gallons per minute, CFM, and other flow rate units.

7+ units
🔤

Typography

Convert between pixels, points, picas, centimeters, millimeters, inches, and other typographic units.

7+ units
📶

Data Transfer Rate

Convert between Kbps, Mbps, Gbps, KB/s, MB/s, and other data transfer speed units.

6+ units

Popular Units of Measurement

Kilogram→Meter→Liter→Celsius→Pound→Inch→Mile→Hectare→Psi→Fahrenheit→Gram→Foot→

How to Use the Unit Converter

1

Choose a Category

UnitConv supports 18 categories: length, weight, volume, temperature, area, pressure, speed, energy, time, and more. Select one in the converter or navigation menu.

2

Enter a Value

Select the source and target units, enter a number. The result appears instantly. Swap units with a single click.

3

Learn More

Each page includes a value table, formula, and unit descriptions. Visit unit detail pages for full info: history, etymology, and fun facts.

Frequently Asked Questions

What is a unit converter?
A unit converter is a tool that converts values from one unit of measurement to another. For example, from kilograms to pounds, meters to feet, or Celsius to Fahrenheit. UnitConv supports 18 categories and over 1,500 conversions.
How do I convert kilograms to pounds?
To convert kilograms to pounds, multiply the number of kilograms by 2.20462. For example, 70 kg = 70 × 2.20462 = 154.32 lbs. Or use our converter for instant results.
How many centimeters are in an inch?
There are exactly 2.54 centimeters in one inch. This is the international definition adopted in 1959. For reverse conversion: 1 cm = 0.3937 inches.
How to convert Celsius to Fahrenheit?
The formula is: °F = °C × 9/5 + 32. For example, 25°C = 25 × 9/5 + 32 = 77°F. The reverse formula: °C = (°F − 32) × 5/9.
What is the difference between metric and imperial?
The metric system (SI) is based on decimal multiples (meter, kilogram, liter) and is used in most countries. The imperial system (feet, pounds, gallons) is used in the US and partially in the UK.
What conversion categories are available?
UnitConv supports 18 categories: length, weight, volume, temperature, area, pressure, speed, energy, time, power, force, data storage, frequency, torque, electric current, flow rate, typography, and data transfer rate.