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Fast, Live & Bidirectional Imperial ⇄ Metric Conversions

Everyday US Unit Converter
Weight, Distance, Temp & Kitchen

Switch seamlessly between US Customary and Metric units for shopping, road trips, baking recipes, and body weight. Type any value for instant real-time conversion across all units.

Convert From lbs
Converted To kg
1 lb = 0.453592 kg
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US Customary vs. Metric System Quick Reference Matrix

NIST Legal Standards

Essential conversion values between American customary units and international metric units across weight, distance, temperature, and kitchen volume.

Category US Customary Unit Metric Equivalent Everyday Practical Rule of Thumb
Weight 1 Pound (lb) 453.59 grams (0.45 kg) Roughly half a kilogram (1 kg ≈ 2.2 lbs).
Weight 1 Ounce (oz) 28.35 grams 16 ounces in a pound.
Distance 1 Mile (mi) 1.609 Kilometers (km) 5 miles is approximately 8 km (60 mph = 96.5 km/h).
Length 1 Inch (in) / 1 Foot (ft) 2.54 cm / 30.48 cm 12 inches in a foot; 6 feet = 182.88 cm.
Temperature 32°F / 68°F / 212°F 0°C / 20°C / 100°C Freezing (0°C = 32°F); Room temp (20°C = 68°F); Boiling (100°C = 212°F).
Kitchen Volume 1 Gallon (gal) / 1 Cup 3.785 Liters / 236.6 ml 1 gallon = 4 quarts = 8 pints = 16 cups.

Everyday US Conversion Reference Cheat Sheets

US Grocery Weights
  • 1/4 lb (Quarter Pound)113.4 g
  • 1/2 lb226.8 g
  • 1 lb (16 oz)453.6 g (0.45 kg)
  • 2.2 lbs1.0 kg
  • 10 lbs4.54 kg
  • 150 lbs bodyweight68.0 kg
Road Speeds & Distance
  • 25 mph (City speed)40.2 km/h
  • 45 mph (Avenue)72.4 km/h
  • 65 mph (Interstate)104.6 km/h
  • 70 mph (Highway)112.7 km/h
  • 5K race3.11 miles
  • 10K race6.21 miles
Oven Temperatures
  • 32°F (Freezing point)0°C
  • 68°F (Room temp)20°C
  • 300°F (Slow bake)149°C (~150°C)
  • 350°F (Standard bake)177°C (~180°C)
  • 400°F (Roasting)204°C (~200°C)
  • 212°F (Boiling point)100°C

Frequently Asked Questions

Q. What is the exact formula to convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature, multiply by 5, and divide by 9: °C = (°F - 32) × 5/9. Conversely, to convert Celsius to Fahrenheit, multiply by 9/5 (1.8) and add 32: °F = (°C × 1.8) + 32.
Q. Why does the US use Customary Units instead of the Metric System?
The US Customary system evolved from the British Imperial system inherited during colonial times. While the Metric Conversion Act was passed in 1975, voluntary conversion meant most American industries and public road signage maintained miles, pounds, and Fahrenheit due to the enormous cost of retooling national infrastructure.
Q. How many cups are in a US liquid pint, quart, and gallon?
In US liquid measurement: 1 cup = 8 fluid ounces. 1 pint = 2 cups (16 fl oz). 1 quart = 2 pints (4 cups, 32 fl oz). 1 gallon = 4 quarts (8 pints, 16 cups, 128 fl oz, or 3.785 Liters).