Weight W = mass (m) × gravitational acceleration (g). On Earth g ≈ 9.8 m/s².

The tool allows any g; g=0 would give weight 0. For division we don't divide by g.

Use consistent units (e.g. kg and m/s² → N; lb and ft/s² → lbf).

Online Weight Calculator

Calculate weight from mass and gravitational acceleration: W = mg. Enter mass and g to get weight.

Mass (m)

g (gravitational acceleration)

Frequently Asked Questions

What is the formula?: Weight W = mass (m) × gravitational acceleration (g). On Earth g ≈ 9.8 m/s².
Can g be zero?: The tool allows any g; g=0 would give weight 0. For division we don't divide by g.
What units?: Use consistent units (e.g. kg and m/s² → N; lb and ft/s² → lbf).

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Free temperature converter.

Tip Calculator

Calculate tip and split the bill. Enter bill amount, tip percentage, and number of people.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers. Supports 1–3999.

Combinations Calculator

Calculate C(n,r) — the number of ways to choose r items from n without order. Uses n!/(r!(n-r)!).

Combinations with Replacement Calculator

Calculate the number of ways to choose r items from n with repetition allowed. Formula: C(n+r-1, r).

Even Permutations Calculator

Count how many permutations of n objects are even (expressible as an even number of swaps). For n ≥ 2, equals n!/2.