Weight Calculator
🧱 Forces & Newton’s laws. Use the Weight formula to find weight, mass, gravitational field g: pick the value you want, type the others, and the answer updates as you go.
g = 9.81 N/kg on Earth, 1.62 on the Moon.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Weight | N |
| Mass | kg |
| Gravitational field g | N/kg |
Worked example
Find the weight when Mass = 10 kg, Gravitational field g = 9.81 N/kg.
Using W = mg: Weight = 98.1 N.
Frequently asked questions
What is the formula for Weight?
W = mg. g = 9.81 N/kg on Earth, 1.62 on the Moon.
What do the letters stand for, and what units are used?
Weight in N, Mass in kg, Gravitational field g in N/kg.
How do you calculate weight?
Put the values into W = mg. For example, with Mass = 10 kg, Gravitational field g = 9.81 N/kg, weight = 98.1 N.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (weight, mass, gravitational field g) and fill in the others: it rearranges the formula for you.
