School & science conversions
Convert metric and US customary units before using physics, chemistry, geometry, or health formulas. For science, keep temperature in Celsius or Kelvin when the formula requires it.
Convert length, weight, temperature, area, volume, speed, time, angle, storage, energy, pressure, and density units with formulas and quick examples.
Length: Distance units for homework, maps, labs, and geometry.
Result
30.48cm
12 in equals 30.48 cm.
Multiply in by 2.54 to get cm.
12 in × 2.54 = 30.48 cm
Convert metric and US customary units before using physics, chemistry, geometry, or health formulas. For science, keep temperature in Celsius or Kelvin when the formula requires it.
Use dimensional analysis: multiply by a conversion factor that equals 1, then cancel the unit you do not want. The converter shows the same factor in the work line.
Do not square a length conversion for area unless the unit is squared. Do not cube a length conversion for volume unless the unit is cubed. Watch radius vs. diameter in circle formulas.