Unit Converter Made Easy

Convert measurements across 20 categories, from everyday distances and weights to engineering, energy and data units. Calculations use the selected units directly in your browser.

Measurement conventions that matter

Volume: a US gallon and an imperial gallon are different sizes. Select the system named on your recipe, container or fuel specification.

Digital storage: this tool uses binary multiples for its KB, MB and GB labels (1 KB = 1,024 bytes). Data transfer rates use decimal multiples, and a byte contains eight bits.

Temperature scales need an offset as well as a scale factor. Fuel consumption in liters per 100 km is reciprocal to distance per liter; a lower consumption figure means less fuel used.

Months and years use fixed average and Julian values, not calendar-date arithmetic. Results are rounded for display; verify calculations independently for safety-critical use.

Popular conversion pages

• Centimeters to Inches
• Inches to Centimeters
• Kilograms to Pounds
• Pounds to Kilograms
• Celsius to Fahrenheit
• Fahrenheit to Celsius
• Millimeters to Inches
• Meters to Feet
• Feet to Meters
• Kilometers to Miles
• Miles to Kilometers
• Liters to Gallons

Accuracy and feedback

Measurement definitions can be checked against the BIPM SI Brochure and NIST Guide for the Use of the International System of Units. Report a missing unit or an unexpected result to hbatchi2002@gmail.com, including the value and both units.