Unit Conversion
Metric and imperial, everyday and technical — translate numbers without re-deriving factors each time.
Recipes, travel, engineering homework, and computer specs all mix units. These converters encode reliable ratios—meters to feet, Celsius to Fahrenheit, pounds to kilograms, liters to gallons, and binary vs decimal byte scales—so you can focus on the problem, not the lookup table. When precision matters (medication, aviation, manufacturing), double-check against standards and your domain’s conventions.
SI scaling
Kilo-, centi-, milli-, and friends multiply or divide base units by powers of ten—move the decimal, not the meaning.
Feet, miles, gallons
Length and volume units often trace to historical definitions; converters bake in modern fixed ratios.
Offsets & slopes
Celsius and Fahrenheit differ in zero points and step size; kelvin shares Celsius-sized degrees from absolute zero.
KB vs KiB
Marketing often uses decimal megabytes (10⁶) while OS tools may show binary mebibytes (2²⁰)—know which column you are in.
Calculators
View all unit conversion toolsHeight
Human-height style conversions—pair feet and inches with metric units for clothing, doors, and charts.
Length
General distance conversions—great for travel, running tracks, and dimensional estimates.
Data Storage
Translate file sizes and disk specs between decimal and binary interpretations where relevant.
Temperature
Convert weather, lab, or cooking temperatures across common scales with correct offsets.
Volume
Kitchen measures, fuel economy context, and cubic meters for engineering estimates.
Weight
Mass-style conversions for luggage, recipes, and fitness—mind whether “weight” means force or everyday mass.
Guides & Articles
View all Unit Conversion articles
Formula Quick Reference
Fixed definitions (inch, mile, gallon type, byte convention) vary by jurisdiction and industry—confirm critical conversions against primary references.
| Formula | Equation | Variables | Result unit | Calculator |
|---|---|---|---|---|
| Metric prefix | value × 10^(prefix exponent) | e.g., kilo = 10³, milli = 10⁻³ | scaled SI unit | Use calculator → |
| Inches to centimeters | cm = in × 2.54 | exact inch definition | cm | Use calculator → |
| Miles to kilometers | km = mi × 1.609344… | international mile definition | km | Use calculator → |
| Celsius ↔ Fahrenheit | °F = °C × 9/5 + 32 | linear transform with offset | ° | Use calculator → |
| Celsius ↔ kelvin | K = °C + 273.15 | absolute zero offset | K | Use calculator → |
| Pounds to kilograms | kg = lb × 0.45359237 | international avoirdupois pound | kg | Use calculator → |
| US gallon to liters | L = gal(US) × 3.785411784 | US liquid gallon | L | Use calculator → |
| Decimal megabyte | 1 MB = 10⁶ bytes | often used in storage marketing | bytes | Use calculator → |
Watch & Learn
Metric prefixes, chained conversion factors, and dimensional consistency—context for using the converters confidently.
Unit conversion within the metric system | Pre-Algebra
Prefixes from kilo to milli—foundation for thinking in SI before hopping between tools.
Converting Units using Multiple Conversion Factors
Factor-label / dimensional-analysis setup—how to chain ratios so units cancel cleanly.
1st application of Dimensional analysis | Units and Measurements
Why consistent units matter in formulas—useful mindset when converting inputs for physics-style problems.
Frequently Asked Questions
Prefixes, temperature offsets, gallons, and bytes—how these tools relate to textbook definitions.