Speed Distance Time Calculator
Solve for speed, distance, or time from any two known values.
By Konstantin Iakovlev · Updated September 2026 · Source: Khan Academy
Speed
60.0 mph
Distance
150.0 mi
Time
2h 30m
Unit Conversions
| Speed (km/h) | 96.6 km/h |
| Distance (km) | 241.4 km |
| Total Minutes | 150 min |
| Total Hours | 2.50 |
Use the Speed Distance Time Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only. Results are estimates based on the information you provide and the assumptions described on this page.
How It Works
Give this tool any two of the three quantities — speed, distance, or time — and it solves for the one you're missing. That makes it handy for mapping out a road trip, estimating how long a journey will take, or breaking down athletic performance. Speed limits on most US interstates run 65 to 75 mph, which makes 60 mph a realistic average once slowdowns are counted.
Everything rests on one relationship: Distance = Speed × Time. Rearrange it and the other two cases fall out, giving Speed = Distance ÷ Time and Time = Distance ÷ Speed. Feed in a distance of 300 miles and a time of 5 hours, for example, and the tool runs Speed = 300 miles ÷ 5 hours to return the speed.
Mismatched units cause most wrong answers, so keep them aligned: miles for distance pairs with miles per hour for speed and hours for time. Confirm each input is in the unit you intend before reading the result. And treat the output as a clean theoretical figure, since it makes no allowance for traffic, rest stops, or weather and road conditions out in the real world.
Example: Driving Coast to Coast
- 1 Imagine you're planning to drive from New York City to Los Angeles, a distance of approximately 2,790 miles. You want to know how long the wheel time will be at an average driving speed of 60 miles per hour.
- 2 Using the formula Time = Distance ÷ Speed, the calculator would perform: Time = 2,790 miles ÷ 60 miles/hour.
- 3 The calculated travel time is 46.5 hours.
- 4 This means your driving time alone would be 46.5 hours. Factoring in rest stops, meals, and overnight stays, you would likely need at least 3 to 4 days to complete this cross-country journey comfortably.
Source: Khan Academy · Last updated: September 2026
Frequently Asked Questions
How do you calculate speed from distance and time?
How do you find distance from speed and time?
How do you convert minutes per mile to miles per hour?
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