Speed, Distance & Time Calculator

The three formulas for speed, distance, and time are:

• Speed = Distance / Time → S = D / T
• Distance = Speed × Time → D = S × T
• Time = Distance / Speed → T = D / S

Examples across unit systems:

Miles (mph): If you drove 150 miles in 2.5 hours:

• Speed = 150 / 2.5 = 60 mph

Kilometers (km/h): If you run at 8 km/h for 45 minutes (0.75 hours):

• Distance = 8 × 0.75 = 6 km

Meters (m/h): If you walk 4,500 meters in 1 hour:

• Speed = 4500 / 1 = 4,500 m/h

Nautical miles (knots): If a ship covers 30 nautical miles in 2 hours:

• Speed = 30 / 2 = 15 knots

This calculator supports all four unit systems — select your preferred unit from the dropdown above.