Force Calculator (F=ma)

Calculate force, mass, or acceleration using Newton's Second Law (F = ma). Includes unit conversions to pounds-force and dynes.

Solve For

Mass

Acceleration

m/s²

Force

Force

98.1 N

Mass10 kg

Acceleration9.81 m/s²

Weight on Earth98.1 N

Force (lbf)22.05 lbf

Force

98.1 N

How to Use This Calculator

Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
Solve For — The variable to solve for. Choose from: Force (F), Mass (m), Acceleration (a). default: 0.
Mass — Mass of the object. Accepts values from 0 kg to 1,000,000 kg (default: 10 kg).
Acceleration — Earth's gravity = 9.81 m/s² Accepts values from 0 m/s² to 1,000,000 m/s² (default: 9.81 m/s²).
Force — Used when solving for mass or acceleration. Accepts values from 0 N to 1,000,000,000 N (default: 98.1 N).
Once all inputs are set, review your results in the Results panel. Here's what each output means:
Force — shown as a numeric value. This is the primary result of this calculator.
Mass — shown as a numeric value.
Acceleration — shown as a numeric value.
Weight on Earth — shown as a numeric value.
Force (lbf) — shown as a numeric value.
Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.

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Formula

F = m × a (Newton's Second Law). Force in Newtons equals mass in kilograms multiplied by acceleration in m/s².

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