About All Unit Converters

Our Mission

All Unit Converters was built with one simple goal: to make unit conversion fast, free and accurate for everyone. Whether you are a student working through a physics problem, a professional engineer checking specifications, a home cook following a foreign recipe, or a traveller trying to make sense of an unfamiliar measurement system — our tools are designed to give you the answer instantly, without fuss.

What We Offer

We provide a comprehensive collection of free online unit converters covering the most important measurement categories used in daily life and professional work. Every converter on our site updates in real time as you type, shows the conversion formula, and works perfectly on mobile, tablet and desktop without any app installation.

Our Converter Categories

• Length & Distance — metres, feet, inches, kilometres, miles and more
• Weight & Mass — kilograms, pounds, grams, ounces, stones and more
• Temperature — Celsius, Fahrenheit and Kelvin
• Area — square metres, acres, hectares, square feet and more
• Volume — litres, gallons, millilitres, cups, pints and more
• Speed — km/h, mph, knots, metres per second and more
• Time — seconds, minutes, hours, days, weeks, months and years
• Data Storage — bytes, kilobytes, megabytes, gigabytes, terabytes and more
• Pressure — PSI, bar, pascal, atmosphere and more
• Energy — joules, calories, kilowatt-hours, BTU and more
• Power — watts, kilowatts, horsepower and more
• Currency — live exchange rates for 100+ world currencies
• Cooking — cups, tablespoons, teaspoons, grams and more
• BMI Calculator — body mass index in metric and imperial
• Age Calculator — exact age in years, months, days and hours
• Number Base Converter — binary, decimal, hexadecimal and octal
• Time Zone Converter — convert times across world time zones
• Fuel Economy — MPG, L/100km, km/L and more
• Angle Converter — degrees, radians, gradians and more

Why Use All Unit Converters?

• Completely free — no sign-up, no subscription, no hidden costs
• Instant results — conversions update as you type, no button to click
• Accurate — all converters use verified, precise conversion factors
• No ads cluttering the tools — clean, distraction-free interface
• Mobile friendly — works perfectly on any device and screen size
• No installation required — runs entirely in your browser
• Educational content — each converter includes explanations, examples and FAQs

Our Commitment to Accuracy

Every conversion factor on this site is sourced from internationally recognised standards including the International System of Units (SI), the National Institute of Standards and Technology (NIST), and other authoritative bodies. We regularly review and update our conversion factors to ensure accuracy. If you ever spot an error or discrepancy, please contact us — we take accuracy seriously and respond promptly.

Our Blog

Beyond the converters themselves, we publish regular guides and articles to help you understand measurements, conversion methods, and the science behind the units you use every day. From practical cooking conversion guides to deep dives into the history of the metric system, our blog is designed to be genuinely useful and informative.

Get in Touch

We welcome feedback, suggestions, bug reports and questions. If there is a converter you would like to see added, a topic you would like us to cover in our blog, or anything else on your mind, please use our contact page to reach us. We read every message.