How fast were you really going? Enter any two of the three values - distance, time or speed - and calculate the missing one. Works with km, miles, m/s and mph.
Average Speed Calculator - Distance, Time and Speed
How fast were you really going? Enter any two of the three values - distance, time or speed - and calculate the missing one. Works with km, miles, m/s and mph.
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How fast were you really going?
Your GPS says 2 hours 15 minutes for a 180 km trip. That is 80 km/h average - even though you were cruising at 130 km/h on the highway. Traffic lights, roundabouts and a fuel stop brought the real number down by almost 40%. This calculator solves any combination of the three variables: distance, time and speed.
Quick start: Choose what you want to calculate (speed, time or distance), enter the two known values and read the result. All units convert automatically - km/h, mph, m/s, miles and kilometers.
How to use this calculator - step by step
- Calculation type - choose what to find: average speed (from distance and time), travel time (from distance and speed) or distance (from speed and time).
- Distance - enter the distance in kilometers, meters or miles. Use your car odometer, map app or route planner for accurate figures.
- Time - enter the travel time in hours, minutes or seconds. For moving average, subtract stops; for overall average, use total elapsed time.
- Speed - enter the average speed if calculating time or distance. Highway: 60-80 mph (100-130 km/h). City: 15-30 mph (25-50 km/h).
- Read the results - the calculator returns the answer in multiple units plus a step-by-step breakdown of the formula.
Road trip scenarios
Average speed: 96.43 km/h (59.92 mph). Typical for a suburban-to-city highway run with moderate traffic.
Average speed: 91.85 km/h (57.07 mph). Includes fuel stops and rest breaks. Moving average was probably 110-120 km/h.
Distance covered: 176 km (109.36 miles). Stop-and-go traffic, loading/unloading, parking maneuvers.
Average speed: 11.25 km/h (6.99 mph) = pace of 5:20 per km. Sub-4-hour marathon territory.
Travel time: 5h 33min 20s. Add 20-30 minutes for water and food stops on a real ride.
Distance: 605 miles (973.65 km). Federal regulation caps driving to 11 hours within a 14-hour window.
Speed, distance and time formulas
| Find | Formula | Example |
|---|---|---|
| Speed | v = s / t | 300 km / 3 h = 100 km/h |
| Time | t = s / v | 200 mi / 65 mph = 3h 4min 37s |
| Distance | s = v x t | 90 km/h x 2.5 h = 225 km |
Typical average speeds by transport mode
| Mode | Average speed | Notes |
|---|---|---|
| Walking | 5 km/h (3.1 mph) | Brisk pace on flat ground |
| Running (recreational) | 10 km/h (6.2 mph) | 6:00 min/km pace |
| Cycling (commuter) | 20 km/h (12.4 mph) | City cycling with stops |
| City driving | 25-40 km/h (15-25 mph) | Lights, intersections, congestion |
| Highway driving | 90-120 km/h (56-75 mph) | Free-flowing traffic, no stops |
| Long road trip (overall) | 70-95 km/h (44-59 mph) | Including stops, fuel, food |
FAQ - Frequently asked questions
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