🏃 Motion Calculator
Speed / Velocity Calculator
Distance · Speed · Time
Solve for speed, distance, or time using v = d / t. Supports km/h, m/s, mph, knots, ft/s. Ideal for physics, travel planning, and sports.
speed calculator
velocity calculator
distance speed time
mph to kmh
Calculator
⏱️
v = d / t
Enter any two values → third is calculated
Distance (d) km
Time (t) hours
Speed (v) km/h
Distance
—
kilometers (km)
Time
—
hours
Speed
—
km/h
📊 Speed indicator (relative to 120 km/h)
Enter values → speed = distance / time
Speed Comparison
📊
Everyday Speeds (km/h)
Compare with your calculated speed
Real-World Examples
📘
Common Trips & Speeds
Solve for missing value using formula
| Scenario | Distance | Time | Speed |
|---|
Physics Guide
Speed, Distance & Time Relationship
🔹 Speed = Distance ÷ Time | Distance = Speed × Time | Time = Distance ÷ Speed
Average Speed
Total distance divided by total time. Stops reduce average speed.
Running Pace
Pace (min/km) = 60 / speed (km/h). 10 km/h ≈ 6 min/km.
Knots & Nautical Miles
1 knot = 1 nautical mile per hour ≈ 1.852 km/h.
Unit Conversion Quick Reference
1 m/s = 3.6 km/h = 2.23694 mph = 1.94384 knots. 1 km/h = 0.621371 mph. To convert ft/s to m/s, multiply by 0.3048.
FAQs
How do I calculate speed from distance and time?+
Speed = distance ÷ time. For example, if you travel 150 km in 2 hours, speed = 75 km/h. Enter distance and time in our calculator, speed appears automatically.
What is the difference between speed and velocity?+
Speed is scalar (magnitude only), velocity is vector (magnitude + direction). Our calculator computes average speed magnitude. For velocity, direction matters.
How to convert m/s to km/h?+
Multiply by 3.6. Example: 10 m/s × 3.6 = 36 km/h. Our unit selector does it automatically.
Can this calculator handle very small or large numbers?+
Yes. Use any decimal values. It works for marathon times (hours) or light-speed (use compatible units).