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Metric Mastery Rules

Division B + C

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Metric Mastery Practice

Problem Settings

Practice Timer

00:00

Conversion Calculator

Quick Reference: Metric Prefixes

PrefixSymbolFactorExample
kilo-k10^3 = 1,0001 km = 1,000 m
hecto-h10^2 = 1001 hm = 100 m
deka-da10^1 = 101 dam = 10 m
(base)-10^0 = 11 m = 1 m
deci-d10^-1 = 0.11 dm = 0.1 m
centi-c10^-2 = 0.011 cm = 0.01 m
milli-m10^-3 = 0.0011 mm = 0.001 m
micro-u10^-61 um = 0.000001 m
nano-n10^-91 nm = 0.000000001 m

Timed Round

Timed Round Settings

Common Estimations Reference

Length

  • Width of pencil: ~7 mm
  • Paper clip: ~3.2 cm
  • Door width: ~0.9 m
  • Desk height: ~75 cm
  • Quarter diameter: ~24 mm

Mass

  • Nickel: ~5 g
  • Pencil: ~6 g
  • Smartphone: ~175 g
  • Apple: ~180 g
  • Sheet of paper: ~5 g

Volume

  • Teaspoon: ~5 mL
  • Tablespoon: ~15 mL
  • Cup: ~240 mL
  • Soda can: ~355 mL
  • Water bottle: ~500 mL

Temperature

  • Freezing water: 0C / 32F
  • Room temp: ~22C / 72F
  • Body temp: ~37C / 98.6F
  • Boiling water: 100C / 212F

Temperature Conversion Formulas

C to F:

F = C x (9/5) + 32

F to C:

C = (F - 32) x (5/9)

C to K:

K = C + 273.15

Tips for Estimation

  • Use reference objects: Compare unknown items to objects you know well (coins, paper, body parts)
  • Practice regularly: Estimation improves dramatically with practice
  • Know your benchmarks: Memorize key measurements (nickel = 5g, pencil width = 7mm)
  • Stay calm: Under pressure, rely on your practiced benchmarks
  • Check reasonableness: Does your estimate make sense compared to known objects?