Newton’s Second Law Calculator: Easily Compute Force Online

Use the online Newton’s Second Law Calculator to multiply mass (kg) by acceleration (m/s²) and get force in Newtons—rounded to two decimals. Enter any non-negative mass and any signed acceleration, then read the result instantly. Earth’s standard gravity is 9.80665 m/s² (NIST, 2023), so a 10 kg object in free fall feels about 98.07 N. Quick, clean, error-free.