Convert kilogram-force to newton.
kgf to N — formula, reference values, and a live converter.
Convert kilogram-force (kgf) to newton (N). This is a fixed-ratio conversion — multiply the input by the factor below.
Formula
N = kgf × 9.80665
Reference values
| kgf (kilogram-force) | N (newton) |
|---|---|
| 1 kgf | 9.8066 N |
| 2 kgf | 19.613 N |
| 5 kgf | 49.033 N |
| 10 kgf | 98.066 N |
| 25 kgf | 245.17 N |
| 50 kgf | 490.33 N |
| 100 kgf | 980.66 N |
| 500 kgf | 4903.3 N |
| 1000 kgf | 9806.6 N |
Things to watch for
- Newtons are SI; pound-force (lbf) is imperial. 1 lbf = 4.448 N (exactly, since the pound is defined exactly).
- Kilogram-force (kgf) is a non-SI unit equal to 9.80665 N — the weight of 1 kg under standard gravity.
- For everyday weight conversion use mass units (kg, lb). For engineering loads use force units (N, lbf).
What is a kilogram-force?
One kilogram-force equals exactly 9.80665 newtons — the force exerted by one kilogram under standard gravity. Older engineering documents, some industrial specifications, and pre-SI scientific literature.
What is a newton?
The newton is the SI unit of force, defined as the force needed to accelerate one kilogram at one meter per second squared. Physics, engineering calculations, and load specifications.
How to convert kilogram-force to newton
To convert a value from kilogram-force (kgf) to newton (N), apply the conversion factor shown in the formula above. The calculation is the same whether you do it by hand, in a spreadsheet, or with the live converter on this page.
Steps:
- Take your input value in kgf.
- Apply the formula
N = kgf × 9.80665. - The result is your value in N.
For repeated calculations, save the formula in a spreadsheet or use the live converter at the top of this page — it handles the math automatically and displays the result as you type.
Frequently asked questions
How do I convert kgf to N?
Apply the formula kgf → N shown above, or just type your value into the converter at the top of this page. The result updates instantly.
Which is bigger, kgf or N?
This depends on the conversion ratio in the formula. If the factor multiplied by your value gives a larger number, then N is the smaller unit (so it takes more of them to express the same quantity). If the result is smaller, then N is the larger unit.
When would I use kgf versus N?
Both units measure force, so the choice depends on context. Kilogram-force is typically used for structural engineering, materials testing, and physics; newton similarly. Most professional fields standardize on one or the other based on regional conventions or technical tradition.
How precise is this kgf to N conversion?
The conversion factor shown is the internationally defined exact value (or the best-published approximation if the relationship is irrational, like degrees-to-radians). The live converter on this page uses double-precision floating-point math, accurate to about 15 significant digits — far beyond any practical engineering need.
Is the conversion ratio exact, or an approximation?
Most unit conversions between SI metric units, and between SI and US customary units, have been formally defined as exact values since the 1959 international yard-pound agreement and subsequent SI redefinitions. Exceptions are unit pairs that involve irrational numbers (radians, e.g.) or empirical conversions (like food calories, which depend on temperature). When in doubt, consult the formula at the top of this page.