# محوّل التسارع

> Convert g-force to m/s², m/s² to g, ft/s² and gal (cm/s²), using standard gravity g₀ = 9.80665 m/s² exactly.

النسخة التفاعلية: https://www.calcopenly.com/ar/conversion/acceleration-converter
الموضوع: محولات الوحدات

Acceleration is change of speed per unit time, and each unit here is a fixed number of metres per second squared. The g of g-force is standard gravity, g₀ = 9.80665 m/s², fixed by the 3rd CGPM in 1901; a foot per second squared is 0.3048 m/s², and a gal (galileo) is 1 cm/s².

The default converts 1 g to 9.80665 m/s². Vehicle performance is the everyday use: a car that reaches 100 km/h from rest in 3 seconds averages 9.26 m/s², or 0.94 g.

Standard gravity is a conventional value. Real free-fall acceleration runs from about 9.78 m/s² at the equator to 9.83 m/s² at the poles, and geophysicists measure its local variations in milligals.

## المدخلات

- **القيمة**: عدد بوحدة المصدر، أو عدد مرفق بوحدته الخاصة
- **من** (الخيارات: metre per second squared (m/s²), standard gravity (g), foot per second squared (ft/s²), gal (galileo))
- **إلى** (الخيارات: metre per second squared (m/s²), standard gravity (g), foot per second squared (ft/s²), gal (galileo))

## النتائج

- القيمة بعد التحويل — النتيجة الرئيسية
- التحويل
- عامل التحويل
- الدقة

## الصيغة

$$
\begin{gathered} x_{\text{to}} = x_{\text{from}} \times \dfrac{f_{\text{from}}}{f_{\text{to}}} \\ f = \text{one unit expressed in } \text{m/s²} \end{gathered}
$$

## أمثلة محلولة

### 1 g in m/s²

- القيمة: 1 g
- من: standard gravity (g)
- إلى: metre per second squared (m/s²)
- **القيمة بعد التحويل: 9.80665 m/s²**
- مصدر التحقق: ⁨Standard gravity g₀ = 9.80665 m/s² exactly (CGPM 1901)⁩

### 1 g in ft/s²

- القيمة: 1 g
- من: standard gravity (g)
- إلى: foot per second squared (ft/s²)
- **القيمة بعد التحويل: 32.1740485564 ft/s²**
- مصدر التحقق: ⁨9.80665 / 0.3048 = 196133/6096 (Python 3.8 fractions from the legal definitions)⁩

### 1 gal in m/s²

- القيمة: 1 Gal
- من: gal (galileo)
- إلى: metre per second squared (m/s²)
- **القيمة بعد التحويل: 0.01 m/s²**
- مصدر التحقق: ⁨1 Gal = 1 cm/s² (NIST SP 811 App. B)⁩

### 9.80665 m/s² is exactly 1 g

- القيمة: 9.80665 m/s²
- من: metre per second squared (m/s²)
- إلى: standard gravity (g)
- **القيمة بعد التحويل: 1 g**
- **الدقة: دقيق**
- مصدر التحقق: ⁨Definition of g₀⁩

## الأسئلة

### What is 1 g in m/s²?

Exactly 9.80665 m/s², the standard acceleration of gravity adopted by the 3rd General Conference on Weights and Measures in 1901. It equals 32.174 ft/s². Local gravity differs slightly; 9.80665 is the convention used for g-force and for units such as the kilogram-force.

### How do I work out g-force from a 0–60 or 0–100 time?

Divide the speed gained by the time, then divide by 9.80665. 0–60 mph (26.8224 m/s) in 3 s averages 8.94 m/s², or 0.91 g; 0–100 km/h (27.78 m/s) in 3 s averages 9.26 m/s², or 0.94 g. The peak acceleration during the run is higher than this average.

### What is a gal (Gal) in acceleration?

One centimetre per second squared, 0.01 m/s², named after Galileo. Earth's surface gravity is about 980 Gal, so gravity surveys work in milligals, where 1 mGal is about one millionth of g. The symbol is Gal, and the unit has nothing to do with the gallon.

### How do I convert ft/s² to m/s²?

Multiply by 0.3048, the exact number of metres in a foot. 32.174 ft/s² is 9.80665 m/s² (1 g), and 10 ft/s² is 3.048 m/s². To go from m/s² to ft/s², divide by 0.3048, which is the same as multiplying by 3.28084.

### Is gravity 9.81 m/s² everywhere?

No. Free-fall acceleration is about 9.780 m/s² at the equator and 9.832 m/s² at the poles, because the Earth spins and bulges at the equator, and it falls slightly with altitude. 9.81 is 9.80665 rounded, the conventional value between those extremes that g-force is measured against.

### ما مدى دقة «⁨محوّل التسارع⁩»؟

تعتمد الدقة على مدخلاتك وافتراضات الطريقة. يستخدم الحساب العشري 50 رقمًا معنويًا، لكن التقديرات والأساليب العددية وبيانات المصدر قد تكون أقل دقة؛ تقريب القيم المعروضة لا يزيل هذه الحدود. أمثلة محلولة جرى التحقق منها بمصادر مستقلة: 4. مثلًا، يجري التحقق من «⁨1 g in m/s²⁩» بالرجوع إلى ⁨Standard gravity g₀ = 9.80665 m/s² exactly (CGPM 1901)⁩.

### ما مصدر هذه الطريقة؟

NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors; NIST Handbook 44, Appendix C — General tables of units of measurement.

## المصادر

- [NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C — General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)