Acceleration Unit Converter

Kinematics & Accelerometry Metrology

Acceleration measures the rate at which velocity increases or decreases per unit time.

The Common Acceleration Scales

• m/s² (Meters per Second Squared): The International System of Units (SI) coherent derived unit.

• ft/s² (Feet per Second Squared): Standard US customary and Imperial engineering unit.

• g (Standard Gravitational Acceleration): Standardized by the 3rd CGPM (1901) as exactly .

• Gal (Galileo): CGS unit defined as used widely in geophysical gravimetry, geodesy, and earthquake ground acceleration monitoring.

How to Use This Calculator

Enter your Acceleration Value (e.g. 9.80665), From Unit — choose from Meters per Second Squared (m/s², Base SI), Feet per Second Squared (ft/s²), Standard Earth Gravities (g = 9.80665 m/s²), and To Primary Target Unit — choose from Standard Gravities (g), Feet per Second Squared (ft/s²), Meters per Second Squared (m/s²). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Standard acceleration unit conversion ratios:/sec^2 to Feet/sec^2: ft/s^2 = (m/s^2) / (0.3048) ≈ m/s^2 × 3.28084 Gravity: 1 g = 9.80665 m/s^2 = 32.17405 ft/s^2 = 980.665 Gal Gain Rates: 1 m/s^2 = 3.6 km/h/s = 2.23694 mph/s0 to 60 mph Time (seconds): t_60 = (26.8224 m/s) / (a (m/s^2))

Worked Example

For example, converting standard Earth gravitational acceleration: 21.94 mph per second, and 980.67 Gal. Under this sustained acceleration, a vehicle reaches 60 mph in 2.74 seconds.

Understanding Your Result

Percentages are relative values — context determines what is "good" or "bad." A 50% discount is significant; a 50% failure rate is alarming. Percentage change and percentage points are different: moving from 4% to 5% is a 1 percentage point increase, but a 25% relative increase. When comparing percentages across different base values, always check whether absolute differences are meaningful — a 10% improvement on a large base creates more absolute value than 10% on a small base.