Convert Kilograms-force to Newtons
Instantly convert Kilograms-force (kgf) to Newtons (N) with our free online calculator.
Formula: kgf to N — multiply by 9.80665
Reference Table
| Kilograms-force (kgf) | Newtons (N) |
|---|---|
| 1 | 9.80665 |
| 5 | 49.0332 |
| 10 | 98.0665 |
| 25 | 245.166 |
| 50 | 490.332 |
| 100 | 980.665 |
How to Convert Kilograms-force to Newtons
Formula
To convert Kilograms-force (kgf) to Newtons (N): multiply by 9.80665
Step-by-Step
- Start with your value in Kilograms-force (kgf).
- Multiply by 9.80665 to perform the conversion.
- The result is your value expressed in Newtons (N).
Conversion Factor
1 kgf = 9.80665 N
Reverse Factor
1 N = 0.101972 kgf
Worked Example
Convert 25 Kilograms-force to Newtons: 25 kgf = 245.166 N
About Kilogram-force (kgf)
A legacy metric unit of force equal to the gravitational pull on a 1-kilogram mass at the standard acceleration of gravity g₀ = 9.80665 m/s² (CIPM Resolution 2, 1901), giving exactly 9.80665 N per kgf. Although officially deprecated in favor of the newton under ISO 80000-4 and BIPM SI Brochure §5.4.1, kgf persists in identifiable contexts: tire-pressure gauges in some European countries (a tire pressure of "2.2 kgf/cm²" appears on Russian and Eastern-European specs), industrial-press tonnage ratings expressed in tonnes-force (where 1 tf = 1,000 kgf = 9.80665 kN), cable-tension and lifting-equipment markings in Japanese and older Soviet/Russian engineering drawings, legacy ASME pressure-vessel international-equivalence tables, and motorcycle/bicycle gear-train torque ratings in older European literature. Converting kgf to newtons is multiply by exactly 9.80665; to lbf is multiply by 2.2046.
About Newton (N)
The SI base unit of force (ISO 80000-4 §4-9), defined as the force required to accelerate one kilogram at exactly 1 meter per second squared (1 N = 1 kg·m·s⁻²). Named after Sir Isaac Newton, whose 1687 Principia Mathematica formalized the second law of motion F = ma that gives the unit its meaning. The newton is the universal reference for force in physics, mechanical engineering, biomechanics, and ergonomic-design standards (ISO 7250 anthropometric data, ANSI/HFES 100 office-equipment force limits). Reference scale: a medium apple weighs ~1 N (the famous Newton-apple coincidence), an average adult weighs 600-800 N, a passenger-car engine produces up to ~10 kN of thrust, a commercial jet engine produces 100-500 kN of thrust at takeoff. Stress in materials science is reported in N/m² (= Pa) and N/mm² (= MPa, the standard for material strength). Convert to lbf by dividing by 4.4482, to kgf by dividing by 9.8067.
Quick Facts
- 1 Kilogram-force equals 9.80665 Newtons
- 1 Newton equals 0.101972 Kilograms-force
- Kilogram-force is a unit of force
- Newton is a unit of force
- This conversion is commonly used in structural engineering, physics, and mechanical design
- The Kilogram-force belongs to the metric system
Common Kilogram-force to Newton Conversions
| Kilograms-force (kgf) | Newtons (N) |
|---|---|
| 0.01 | 0.0980665 |
| 0.1 | 0.980665 |
| 0.25 | 2.45166 |
| 0.5 | 4.90332 |
| 1 | 9.80665 |
| 2 | 19.6133 |
| 3 | 29.42 |
| 5 | 49.0332 |
| 10 | 98.0665 |
| 15 | 147.1 |
| 20 | 196.133 |
| 25 | 245.166 |
| 50 | 490.332 |
| 75 | 735.499 |
| 100 | 980.665 |
| 250 | 2451.66 |
| 500 | 4903.32 |
| 1000 | 9806.65 |
| 5000 | 49033.3 |
| 10000 | 98066.5 |
Understanding Kilograms-force
The Kilogram-force (symbol: kgf) is a unit of force. A legacy metric unit of force equal to the gravitational pull on a 1-kilogram mass at the standard acceleration of gravity g₀ = 9.80665 m/s² (CIPM Resolution 2, 1901), giving exactly 9.80665 N per kgf. Although officially deprecated in favor of the newton under ISO 80000-4 and BIPM SI Brochure §5.4.1, kgf persists in identifiable contexts: tire-pressure gauges in some European countries (a tire pressure of "2.2 kgf/cm²" appears on Russian and Eastern-European specs), industrial-press tonnage ratings expressed in tonnes-force (where 1 tf = 1,000 kgf = 9.80665 kN), cable-tension and lifting-equipment markings in Japanese and older Soviet/Russian engineering drawings, legacy ASME pressure-vessel international-equivalence tables, and motorcycle/bicycle gear-train torque ratings in older European literature. Converting kgf to newtons is multiply by exactly 9.80665; to lbf is multiply by 2.2046.
It belongs to the metric measurement system.
Kilograms-force are commonly used in structural engineering, physics, and mechanical design.
Understanding Newtons
The Newton (symbol: N) is a unit of force. The SI base unit of force (ISO 80000-4 §4-9), defined as the force required to accelerate one kilogram at exactly 1 meter per second squared (1 N = 1 kg·m·s⁻²). Named after Sir Isaac Newton, whose 1687 Principia Mathematica formalized the second law of motion F = ma that gives the unit its meaning. The newton is the universal reference for force in physics, mechanical engineering, biomechanics, and ergonomic-design standards (ISO 7250 anthropometric data, ANSI/HFES 100 office-equipment force limits). Reference scale: a medium apple weighs ~1 N (the famous Newton-apple coincidence), an average adult weighs 600-800 N, a passenger-car engine produces up to ~10 kN of thrust, a commercial jet engine produces 100-500 kN of thrust at takeoff. Stress in materials science is reported in N/m² (= Pa) and N/mm² (= MPa, the standard for material strength). Convert to lbf by dividing by 4.4482, to kgf by dividing by 9.8067.
It belongs to the metric measurement system.
Newtons are commonly used in structural engineering, physics, and mechanical design.
Why Convert Kilograms-force to Newtons?
Converting between Kilograms-force and Newtons is a frequent requirement for engineers, scientists, and students working with force values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate force conversion is essential.
Frequently Asked Questions
How do I convert Kilograms-force to Newtons?
A legacy metric unit of force equal to the gravitational pull on a 1-kilogram mass at the standard acceleration of gravity g₀ = 9. To convert Kilograms-force to Newtons, multiply by 9.80665. For example, 25 kgf equals 245.166 N.
How many Newtons are in 1 Kilogram-force?
There are 9.80665 Newtons in 1 Kilogram-force.
How many Kilograms-force are in 1 Newton?
There are 0.101972 Kilograms-force in 1 Newton.
What is the formula for Kilogram-force to Newton conversion?
The formula is: multiply by 9.80665. This means 1 kgf = 9.80665 N.
Is a Kilogram-force bigger than a Newton?
No. One Kilogram-force is smaller than one Newton because 1 kgf equals 9.80665 N, which is greater than 1.
When do you need to convert between Kilograms-force and Newtons?
The SI base unit of force (ISO 80000-4 §4-9), defined as the force required to accelerate one kilogram at exactly 1 meter per second squared (1 N = 1 kg·m·s⁻²). Kilogram-force and Newton are both force units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.