Force Calculator
Calculate force (F=ma), work (W=Fd), and power (P=W/t) with unit conversions. Apply Newton’s laws instantly.
Quick Answer
Force = Mass × Acceleration. A 10 kg object under gravity (9.81 m/s²) experiences 98.1 Newtons of force. Work = Force × Distance. Power = Work / Time.
Calculate
Results
98.10 N
Force
F = m × a = 10 kg × 9.81 m/s² = 98.10 N
98.10 N
Newtons
22.0538 lbf
Pounds-force
10.0034 kgf
Kilogram-force
9810000 dyn
Dynes
About This Tool
The Force Calculator computes force, work, and power using the fundamental equations of classical mechanics. It supports multiple unit conversions and provides the formula used at each step.
Newton’s Second Law: F = ma
Force equals mass times acceleration. One Newton is the force needed to accelerate 1 kilogram at 1 meter per second squared. On Earth, gravity provides approximately 9.81 m/s² of acceleration, so a 1 kg object weighs about 9.81 N.
Work: W = Fd
Work is force applied over a distance. One Joule equals one Newton applied over one meter. This formula assumes force is applied in the direction of motion. If force is at an angle, multiply by the cosine of the angle.
Power: P = W/t
Power is the rate of doing work. One Watt equals one Joule per second. A 100W light bulb converts 100 Joules of electrical energy per second. One horsepower equals approximately 746 Watts.
Unit Conversions
The calculator converts between SI units and common alternatives. Force: Newtons, pounds-force, kilogram-force, dynes. Work: Joules, kilocalories, foot-pounds, kilowatt-hours. Power: Watts, horsepower, BTU/hour, kilowatts.
Frequently Asked Questions
What is 1 Newton of force?
How do I convert Newtons to pounds?
What is the difference between mass and weight?
How many Watts is one horsepower?
What is a Joule in everyday terms?
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