🔢 Metric & Customary Conversion

The Metric System
The metric system is based on powers of 10 — it's easy to convert!
Metric Length Conversions:
UnitAbbreviationRelationKilometerkm1 km = 1000 mMeterm1 m = 100 cmCentimetercm1 cm = 10 mmMillimetermmsmallest unitMetric Mass (Weight) Conversions:
UnitAbbreviationRelationKilogramkg1 kg = 1000 gGramg1 g = 1000 mgMetric Capacity (Volume) Conversions:
UnitAbbreviationRelationLiterL1 L = 1000 mLMillilitermLsmallestConversion Rule:
• Large → Small: Multiply (×)
• Small → Large: Divide (÷)

Time Conversions:
RelationConversion1 hour = 60 minutes×60 or ÷601 minute = 60 seconds×60 or ÷601 day = 24 hours×24 or ÷24Converting Hours to Minutes:
• Hours → Minutes: multiply by 60
• Example: 2.5 hours = 2.5 × 60 = 150 minutes

Converting Minutes to Hours:
• Minutes → Hours: divide by 60
• Example: 180 minutes = 180 ÷ 60 = 3 hours

Decimals vs. Minutes:
• 0.5 hour = ½ hour = 30 minutes
• 0.25 hour = ¼ hour = 15 minutes
• 0.75 hour = ¾ hour = 45 minutes