変換方法 Force Units
ニュートン, ポンド, kgf, and Dynes
Get the FormulasEngineering drawings might show force in newtons, pounds-force, or kilogram-force depending on origin. Converting between these units is essential for international collaboration, equipment specification, and understanding technical documentation from different sources.
Step-by-Step Conversions
ニュートン to ポンド-Force
- Find your force in newtons (e.g., 500 N)
- Divide by 4.448 (or multiply by 0.2248)
- Result: 500 ÷ 4.448 = 112.4 lbf
ポンド-Force to ニュートン
- Find your force in pounds-force (e.g., 100 lbf)
- Multiply by 4.448
- Result: 100 × 4.448 = 444.8 N
Kilogram-Force to ニュートン
- Find your force in kgf (e.g., 50 kgf)
- Multiply by 9.807
- Result: 50 × 9.807 = 490.4 N
Complete Conversion Table
| 変換元 \ 変換先 | Newton (N) | Pound-force (lbf) | Kilogram-force (kgf) | Dyne (dyn) |
|---|---|---|---|---|
| 1 Newton | 1 | 0.2248 | 0.1020 | 100,000 |
| 1 Pound-force | 4.448 | 1 | 0.4536 | 444,822 |
| 1 Kilogram-force | 9.807 | 2.205 | 1 | 980,665 |
| 1 Dyne | 0.00001 | 0.00000225 | 0.00000102 | 1 |
理解する Each Unit
Newton (N)
- System: SI (metric)
- Definition: Force to accelerate 1 kg at 1 m/s²
- Use: International scientific standard
Pound-Force (lbf)
- System: Imperial/US Customary
- Definition: Force from gravity on 1 pound-mass
- Use: US engineering
Kilogram-Force (kgf)
- System: Metric (non-SI)
- Definition: Force from gravity on 1 kilogram
- Use: Legacy metric, some Asian standards
Dyne (dyn)
- System: CGS
- Definition: Force to accelerate 1 gram at 1 cm/s²
- Use: Some scientific applications
Practical Reference Values
| Example Force | ニュートン | ポンド-force | Kilogram-force |
|---|---|---|---|
| Apple weight | 1 | 0.22 | 0.10 |
| Person pushing door | 50 | 11 | 5.1 |
| 150 lb person's weight | 667 | 150 | 68 |
| Car pushing (starting) | 500 | 112 | 51 |
| Seatbelt in crash | 10,000 | 2,248 | 1,020 |
| Small crane lift | 50,000 | 11,240 | 5,099 |
| Jet engine thrust | 100,000 | 22,481 | 10,197 |
Converting Weight to Force
Weight is a force—the gravitational pull on a mass:
変換元 Mass to Force
- キログラム to ニュートン: Multiply by 9.807
- ポンド-mass to ポンド-force: Numerically equal on Earth
- キログラム to ポンド-force: Multiply by 2.205
Example
A 70 kg person:
- Weight in N: 70 × 9.807 = 686.5 N
- Weight in lbf: 70 × 2.205 = 154.4 lbf
- Weight in kgf: 70 kgf (equal to mass numerically)
まとめ
Force unit conversion requires different factors depending on the units involved. The key relationships are: 1 lbf = 4.448 N, and 1 kgf = 9.807 N. For quick estimates, multiply pounds-force by 4.5 to get newtons, or multiply kilogram-force by 10. 理解する these conversions enables working with international specifications and technical documents from different measurement systems.