Speed Distance Time Calculator
Solve for speed, distance, or time — fill in the two values you know, and calculate the third.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Distance = Speed × Time. Choose what to solve for and enter the other two values to calculate it.
Your result
4
Result
CalculatingTime (hours)
Time (formatted)4h
AI explanation
Formula
Distance = Speed × Time — solved for whichever variable you're missingWorked example
Solve for speed: 300 km in 5 hours
| Field | Value |
|---|---|
| What do you want to calculate? | speed |
| Distance (km) — ignored if solving for distance | 300 |
| Time (hours) — ignored if solving for time | 5 |
| Calculating | Speed (km/h) |
| Result | 60 |
Assumptions
- Enter accurate values for the two fields NOT matching what you're solving for — the field matching your "solve for" choice is ignored, whatever value it holds.
- Assumes constant speed throughout — real-world speed variation (traffic, stops) isn't modeled.
Frequently asked questions
What is the classic speed-distance-time formula?
Distance = Speed × Time. Rearranged, Speed = Distance ÷ Time, and Time = Distance ÷ Speed — this calculator solves whichever form you need based on your "solve for" choice.
Which fields do I need to fill in?
Fill in the two fields that do NOT match what you selected in "What do you want to calculate?" — for example, to solve for time, enter speed and distance. The third field's value is ignored regardless of what it shows.
Are there dedicated pages for driving time and trip distance specifically?
Yes — see the Driving Time Calculator and Trip Distance Calculator for the same formula pre-set to those specific use cases, with only the two relevant fields shown.