Back to Tools
Force Mass calculator
Force Mass calculatorForce & Mass
F = ma · Newton's 2nd Law · Weight · Impulse Analysis
F = m × a | W = m × g | Impulse: J = F × t | Momentum: p = m × v
About the Force Mass calculator
Calculate force, mass, acceleration, weight or impulse using Newton's second law.
How to use the Force Mass calculator
- Choose what to solve for: force (F), mass (m), acceleration (a) or weight (W).
- Enter the known values, and Time (s) if you need impulse or Gravity (m/s²) for weight.
- Press Calculate.
Formula and method
F = m × a, weight W = m × g and impulse J = F × t. On Earth g ≈ 9.81 m/s².
Worked example
A 70 kg person has a weight of 70 × 9.81 = 686.7 N on Earth.
Tips
- Mass is measured in kilograms and weight (a force) in newtons.
- Use 1.62 m/s² for gravity on the Moon.
Frequently Asked Questions
Mass is the amount of matter and stays the same everywhere. Weight is the gravitational force on that mass and changes with gravity.