Instantly convert any unit of measurement — length, weight, temperature, volume, area, speed, time & data. Real-time results, no login needed.
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Not sure how to convert units? Follow these 4 simple steps to use our free unit conversion calculator for any measurement conversion.
Choose from 8 measurement conversion categories: Length, Weight, Temperature, Volume, Area, Speed, Time, or Data Storage. Each category covers both metric system and imperial system units.
Type your number in the From field. The unit conversion calculator updates results instantly — no button press needed. Works for whole numbers, decimals, and large values.
Choose From and To units from the dropdown, or click quick-pick chips for top searches like cm to inches, kg to lbs, Celsius to Fahrenheit, or miles to km.
Copy your result in one click to share or paste into documents. Hit Swap to reverse the result — switch meters to feet to feet to meters instantly.
This metric conversion chart covers the world's most searched unit conversions. Whether you need to convert cm to inches, kg to lbs, Fahrenheit to Celsius, miles to km, liters to gallons, or meters to feet — click "Try It" to load any value into the calculator above. All results use verified SI formulas.
| From | To | Value | Result | Category | Try |
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This unit conversion calculator updates results instantly as you type. No submit button — see your measurement conversion result in milliseconds across all 8 categories.
See all unit conversions at once in a comprehensive conversion table. Compare values across all units simultaneously — the fastest way to build a metric conversion chart for any value.
One-click chips for top searches: cm to inches, kg to lbs, Celsius to Fahrenheit, miles to km, mph to kph. Skip the dropdowns — convert in one tap.
Reverse any conversion instantly — flip inches to cm to cm to inches, or lbs to kg to kg to lbs. Switch between metric to imperial and imperial to metric in one click.
Copy your conversion formula result to clipboard in one click. Share with classmates, paste into engineering reports, or add to recipe documents. Includes full formula context.
The measurement tool works perfectly on all smartphones and tablets. Touch-friendly 50px buttons, readable fonts, and a responsive layout for any screen size — iOS and Android.
Covers 80+ units of measurement across 8 categories. Full SI units support plus imperial and US customary. Includes rare units like nautical miles, light years, stones, Rankine, and Mach number.
All convert measurement units calculations use verified SI units factors to 6 significant figures. Temperature uses exact official conversion formulas (°F = °C × 9/5 + 32) for maximum precision.
No login, no signup, no download. All measurement conversion calculations happen locally in your browser. No data sent to servers. Completely free with no usage limits.
Convert units for science, physics, chemistry, and math homework. Use the length converter for geometry (cm to inches, mm to inches), weight converter for chemistry (grams to ounces), and temperature converter for physics (Kelvin to Celsius). Ideal for science conversion and math conversion assignments.
Essential travel conversion tool — convert miles to km for road trips, Fahrenheit to Celsius for weather, lbs to kg for baggage limits, and gallons to liters for fuel prices. Switch between metric to imperial seamlessly when crossing borders.
Perfect cooking measurement and recipe conversion tool. Convert cups to ml, ounces to grams, tablespoons to teaspoons, and liters to gallons. Switch international recipes from the metric system to US customary units in seconds.
Engineering conversion for metric and imperial measurements. Use for dimensions (feet to meters, yards to meters), load calculations (kg to lbs), and velocity (kph to mph). Supports all standard units and SI units for technical documentation.
Convert square meters to square feet — the most searched area conversion. Also converts square footage to hectares and acres. Essential for international property listings comparing metric system vs imperial system measurements.
Data storage conversion calculator: GB to MB, TB to GB, KB to MB for file sizes and cloud planning. Also converts bandwidth and speed using standard units. Includes Mach number for advanced speed calculations.
Understanding the difference between the metric system and imperial system is essential for accurate measurement conversion. The metric system (officially the International System of Units or SI units) is used by 95% of the world. The imperial system is primarily used in the United States. Our unit conversion calculator handles both systems seamlessly.
Based on powers of 10 — easy to convert between units. Uses: meters (length), kilograms (weight), liters (volume), Celsius (temperature), square meters (area). Common prefixes: kilo (×1000), centi (÷100), milli (÷1000). Used worldwide in science, engineering, and everyday life.
Non-decimal relationships between units. Uses: feet/inches/miles (length), pounds/ounces (weight), gallons/cups (volume), Fahrenheit (temperature), square feet/acres (area). Primarily used in the USA. Converting imperial to metric is essential for international travel and science.
These are the most important unit formulas used in our unit conversion calculator. All formulas follow SI units and official international system of units standards.
| Conversion | Formula | Example | Category |
|---|---|---|---|
| cm to inches | inches = cm × 0.393701 | 30 cm = 11.811 in | Length |
| inches to cm | cm = inches × 2.54 | 12 in = 30.48 cm | Length |
| kg to lbs | lbs = kg × 2.20462 | 70 kg = 154.32 lbs | Weight |
| lbs to kg | kg = lbs × 0.453592 | 150 lbs = 68.04 kg | Weight |
| Celsius to Fahrenheit | °F = (°C × 9/5) + 32 | 100°C = 212°F | Temperature |
| Fahrenheit to Celsius | °C = (°F − 32) × 5/9 | 98.6°F = 37°C | Temperature |
| miles to km | km = miles × 1.60934 | 10 mi = 16.09 km | Length |
| km to miles | miles = km × 0.621371 | 100 km = 62.14 mi | Length |
| meters to feet | feet = meters × 3.28084 | 1 m = 3.281 ft | Length |
| feet to meters | meters = feet × 0.3048 | 10 ft = 3.048 m | Length |
| liters to gallons | gallons = liters × 0.264172 | 10 L = 2.642 gal | Volume |
| mph to kph | kph = mph × 1.60934 | 60 mph = 96.56 kph | Speed |
Save this free online unit converter for instant access anytime you need to convert length, weight, temperature, or any other unit of measurement.
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