Speed Calculator
Calculate speed, distance, or travel time instantly. Convert between km/h, mph, m/s, and knots. Includes real Zambian driving routes, speed limits, and travel time estimates.
Speed Calculator
Select what you want to find. Leave the unknown field empty and click Calculate.
| Distance | Distance Unit |
| Time | Time Unit |
| Speed | Speed Unit |
Convert between common speed units used in Zambia and worldwide.
- 100 km/h = 62.14 mph = 27.78 m/s = 53.99 knots
- 60 mph = 96.56 km/h
- 1 m/s = 3.6 km/h
- 1 knot = 1.852 km/h
Major Zambian Driving Routes
Estimated travel times based on average driving speeds on Zambian roads (including stops and road conditions).
Speed Limits in Zambia
| Road Type | Speed Limit | Notes |
|---|---|---|
| School Zones | 30 km/h | When children are present |
| Built-up / Urban Areas | 40 km/h | Within town/city limits |
| Open Roads (Gravel) | 60 – 80 km/h | Depending on condition |
| Highways (Tarred) | 100 km/h | Major trunk roads (e.g., Great North Road) |
| Heavy Vehicles (Trucks/Buses) | 80 km/h | Maximum on all roads |
Fuel Consumption Estimate
For a typical mid-size vehicle consuming 8 liters per 100 km:
- Lusaka → Kitwe (320 km): ~25.6 liters
- Lusaka → Livingstone (470 km): ~37.6 liters
- Lusaka → Kasama (900 km): ~72 liters
What is the formula for speed?
The three core formulas are:
- Speed = Distance ÷ Time
- Distance = Speed × Time
- Time = Distance ÷ Speed
How do I convert km/h to mph?
Multiply km/h by 0.621371. For example: 100 km/h × 0.621371 = 62.14 mph. Use our Unit Converter tab for instant conversions.
How long does it take to drive from Lusaka to Kitwe?
The distance is approximately 320 km. At an average speed of 80 km/h (including brief stops), the journey takes about 4 hours. Actual time may vary based on traffic, road conditions, and weather.
What is the speed limit on Zambian highways?
The maximum speed limit on tarred highways in Zambia is 100 km/h for light vehicles, and 80 km/h for heavy vehicles (trucks and buses). In urban areas, the limit drops to 40 km/h.
How fast is 100 km/h in other units?
100 km/h equals:
- 62.14 mph (miles per hour)
- 27.78 m/s (meters per second)
- 53.99 knots (nautical miles per hour)
How do I calculate average speed for a trip with stops?
Average speed = Total Distance ÷ Total Time (including stops). For example, if you drive 320 km in 4 hours total (including 30 minutes of stops), your average speed is 320 ÷ 4 = 80 km/h.
What is a knot?
A knot is a unit of speed equal to 1 nautical mile per hour (1.852 km/h). It is used primarily in maritime and aviation contexts. Lake Kariba boat operators and pilots at Kenneth Kaunda International Airport use knots.
How do I calculate travel time with breaks?
First calculate driving time: Distance ÷ Speed. Then add your planned break time. For example: 470 km ÷ 80 km/h = 5.875 hours driving. Add 30 minutes for a break = 6 hours 17 minutes total.
Understanding Speed, Distance, and Time
Speed, distance, and time are three interconnected measurements used in everyday life — from planning a road trip to Lusaka, to calculating how long it takes to walk to the market, to estimating fuel consumption for your vehicle.
Speed = Distance ÷ Time
Distance = Speed × Time
Time = Distance ÷ Speed
Remember: “D over S and T” — Distance is on top, Speed and Time are on the bottom.
Common Speed Units in Zambia
- Kilometers per hour (km/h): The standard unit used on all Zambian road signs, vehicle speedometers, and traffic enforcement.
- Meters per second (m/s): Used in scientific and athletic contexts (e.g., sprinting speeds).
- Miles per hour (mph): Used when interpreting foreign vehicles (especially from the UK or US) or international travel information.
- Knots: Used in aviation and on Lake Kariba, Lake Tanganyika, and Lake Bangweulu for boat navigation.
Disclaimer: This calculator provides mathematical estimates based on the values you enter. Actual travel times may vary due to road conditions, traffic, weather, and stops. Distances shown are approximate. Always plan for safe driving and obey all traffic laws.