Using the Weight Calculator
Enter mass in kilograms and acceleration in meters per second squared. The default acceleration is standard gravity; you can supply another value for a different modeled situation. Multiplying them gives the force associated with that mass and acceleration.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Mass (kg)
- 70
- Gravitational acceleration (m/s²)
- 9.80665
Example result
- Weight force (N)
- 686.4655
Method and assumptions
Weight force = mass × gravitational acceleration. Weight force in newtons differs from mass in kilograms.
Carry the units through the formula
Writing the units beside the numbers is a useful way to check a physical calculation. Kilograms divided by cubic meters gives density; meters divided by seconds gives speed. If the units do not combine into the quantity you expect, convert the inputs first. Keep rounding until the final step when using the answer in another calculation.
Common question
Would my mass change on another planet?
Changing gravitational acceleration changes the calculated weight force while leaving the entered mass unchanged. This is exactly the distinction the formula represents: the same mass can experience a different gravitational force.
Guide updated .