How to find the mass of an object given its weight and the acceleration due to gravity.

Suppose:

• Fg = 215 N
• a_g = 9.8 m/s² (as on Earth)

Calculate:

	Starting formula: The weight of an object equals the object's mass times the gravitational acceleration.
	Divide each side by ag.
	ag's cancel.
	After ag units cancel, we have solved for m.
	Switch left and right sides.
	Plug in values with units.
	Note that the unit N (Newton) is the same as kg-m/s2 (kilogram-meter per second squared).
	m/s2 units cancel.
	After m/s2 units cancel, we have units for mass, kg.
	Calculation completed to significant digits.