Unit Converter — Free Online Unit Conversion Tool
Use this free unit converter to instantly convert between units of distance, weight, temperature, speed, volume and time. Select your conversion type, enter a value and get an instant result with multiple unit conversions shown at once.
Quick Unit Converter
How to Use the Unit Converter
Select your conversion type from the dropdown menu. Choose from distance, weight, temperature, speed, volume or time. Enter your value and click Convert. Your result shows instantly along with three additional related conversions for maximum value.
What Can You Convert?
📏 Distance
Convert between kilometres, miles, metres, feet, inches and centimetres. Essential for travel planning, running, navigation and understanding international road signs.
⚖️ Weight
Convert between kilograms, pounds, grams, ounces, stones and tonnes. Perfect for cooking, fitness tracking, shopping and international shipping.
🌡️ Temperature
Convert between Celsius, Fahrenheit and Kelvin. Used daily for weather, cooking temperatures and scientific measurements.
🚗 Speed
Convert between KM/H, MPH, M/S and knots. Useful for driving, sport performance and physics calculations.
🥛 Volume
Convert between cups, millilitres, tablespoons, teaspoons, litres and gallons. Indispensable for cooking and baking with international recipes.
⏱️ Time
Convert between hours, minutes, seconds and days. Helpful for scheduling, project planning and time zone calculations.
Looking for a Specific Converter?
Browse our full library of dedicated conversion calculators including miles to km, kg to pounds, celsius to fahrenheit, cups to ml and many more.
Why Use a Unit Converter?
Different countries use different measurement systems — the metric system (kilometres, kilograms, Celsius) is used by most of the world, while the imperial system (miles, pounds, Fahrenheit) is still used in the United States and partially in the United Kingdom. Converting between these systems is a daily need for travellers, cooks, students, scientists and anyone working with international data.
A unit converter removes the need to remember formulas or do manual calculations — just enter your value and get an instant accurate result.
FAQs
What units can I convert with this tool?
This unit converter handles distance, weight, temperature, speed, volume and time conversions across 30+ conversion types. For currency conversion use our dedicated Currency Converter.
How accurate are the conversions?
All conversions use standard internationally recognised conversion factors and are accurate to multiple decimal places.
What is the difference between metric and imperial?
The metric system uses units like kilometres, kilograms and Celsius and is used by most countries worldwide. The imperial system uses miles, pounds and Fahrenheit and is primarily used in the United States.
Can I convert units on mobile?
Yes — this converter works on all devices including phones, tablets and desktop computers.
Is this unit converter free?
Yes, completely free with no sign-up or account needed.