Speed Distance Time Calculator

Speed Distance Time Formula

Worked Example

A 150 km drive that takes 2 hours 30 minutes:

1. v = d ÷ t
2. v = 150 ÷ 2.5
3. v = 60 km/h

In mph: 37.28227153 mph · In ft/s: 54.68066492 ft/s · In knots: 32.39740821 knots · Pace (minutes per km): 1 min/km · Pace (minutes per mile): 1.609344 min/mi

Converting speed units

Multiply m/s by 3.6 for km/h; 1 mph is exactly 1.609344 km/h; 1 knot is exactly 1.852 km/h. The speed converter covers every unit pair.

More Motion Calculators

• Acceleration Calculator

  a = (v − u) / t

  a acceleration, v final velocity, u initial velocity, t time taken

  Example: A car that speeds up from 5 m/s to 25 m/s in 10 s: Acceleration a = 2 m/s².

  Open the acceleration calculator →

• Equations of Motion (SUVAT) Calculator

  v = u + at, s = ut + ½at², v² = u² + 2as, s = (u + v)t/2

  s displacement, u initial velocity, v final velocity, a acceleration, t time

  Example: A body starting from rest (u = 0) with a = 2 m/s² for t = 10 s: displacement s = 100 m.

  Open the equations of motion (suvat) calculator →

• Free Fall Calculator

  h = ½ g t², v = g t = √(2gh)

  h height fallen, t time, v speed reached, g gravitational acceleration

  Example: A stone dropped from 45 m: Fall time t = 3.02943 s.

  Open the free fall calculator →

• Projectile Motion Calculator

  R = v₀ cos θ × T, H = h₀ + (v₀ sin θ)²/2g

  T = (v₀ sin θ + √((v₀ sin θ)² + 2gh₀))/g; on level ground R = v₀² sin 2θ / g

  Example: A ball kicked at 20 m/s and 45° from ground level (g = 9.80665 m/s²): Range R = 40.7886 m.

  Open the projectile motion calculator →

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.