Convert all kinds of units instantly. Free online calculator for length, weight, temperature, volume, area, speed, time, and digital units.
Convert between SI metric, US customary, and imperial measurements instantly using exact NIST and ISO base factors—covering length, weight, temperature, cooking volume, running pace (min/km to min/mi with 5K and marathon splits), tire pressure (bar to psi), and broadband data rates (Mbps to MB/s).
| From | To | Formula & How to Convert |
|---|---|---|
| 1 Inches (in) | 2.54 Centimeters (cm) | 1 in = 2.54 cm |
| 1 Feet (ft) | 30.48 Centimeters (cm) | 1 ft = 30.48 cm |
| 1 Miles (mi) | 1.60934 Kilometers (km) | 1 mi = 1.6093 km |
| 1 Kilograms (kg) | 2.20462 Pounds (lb) | 1 kg = 2.2046 lb |
| 1 Ounces (oz) | 28.3495 Grams (g) | 1 oz = 28.35 g |
| 0 Degrees Celsius (C) | 32 Degrees Fahrenheit (F) | 0 C = 32 F |
| 100 Degrees Celsius (C) | 212 Degrees Fahrenheit (F) | 100 C = 212 F |
| 1 Gallons (gal) | 3.78541 Litres (l) | 1 gal = 3.7854 l |
| 1 Bar (bar) | 14.5038 Pounds per square inch (psi) | 1 bar = 14.504 psi |
| 8 Megabits (Mb) | 1 Megabytes (MB) | 8 Mb = 1 MB |
Every conversion uses exact international standard definitions—such as 1 inch = 2.54 cm, 1 kilogram = 2.20462262 lb, °F = (°C × 9/5) + 32, 1 bar = 14.50377 psi, and 1 megabyte (MB) = 8 megabits (Mb)—with worked step-by-step formulas and 20-row reference tables.
Unit Converter FYI supports 191 units across 25 categories including length, mass & weight, temperature, volume, area, speed, running pace, time, digital storage & bits, pressure, energy, power, frequency, voltage, and electric current.