The Professional's Choice for Unit Conversion
Accurate to 15 decimal places. Convert 500+ units in 7 languages. Built for engineers & scientists. Privacy-first, real-time results, professional tool.
Categories
Length
Convert meters, feet, inches, kilometers, miles and more
Weight
Convert kilograms, pounds, ounces, tons and more
Temperature
Convert Celsius, Fahrenheit, Kelvin and more
Area
Convert square meters, acres, hectares and more
Volume
Convert liters, gallons, cups, milliliters and more
Speed
Convert km/h, mph, m/s, knots and more
Currency
Convert between major world currencies with live exchange rates
Popular Converters
Quick access to the most frequently used unit conversions
Guides & Tutorials
Learn how to convert units accurately with our comprehensive guides
Wine & Spirits: ABV, Proof, Volume and Serving Guide
Learn what ABV and proof mean, how US and UK systems differ, common bottle sizes, standard drink rules, pour measures, and labeling basics.
Diamond Carat vs Gold Karat: Two Words, Completely Different Meanings
Understand the difference between carat (diamond weight: 1 carat = 0.2g) and karat (gold purity: 24K = 100% pure). Never confuse these jewelry terms again.
Gold Weight Explained: Why Troy Ounces Aren't Regular Ounces
Discover why gold uses troy ounces (31.1g) instead of regular ounces (28.3g). Learn the history behind precious metal weights and convert like a professional.
Understanding Property Sizes: Square Meters vs Square Feet
A 1,000 sqft apartment in NYC vs 100 sqm in Berlin - which is bigger? Learn to compare property sizes worldwide with conversion tips and price comparisons.
Package Weight Limits by Carrier: UPS, FedEx, DHL, and USPS Compared
Compare shipping weight limits for UPS, FedEx, DHL, and USPS. Learn dimensional weight formulas (LxWxH/166) and international shipping rules to avoid surprise fees.
Fuel Economy: Understanding MPG vs L/100km Conversions
30 mpg sounds good until you realize Europeans measure it backwards. Learn why lower L/100km is better, plus the quick formula: 235 divided by mpg equals L/100km.
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