Time & Date · Travel & Distance
Speed, Distance & Time Calculator
Enter any two of speed, distance and time to get the third, in kilometres, miles, nautical miles or even light-years — with pace per km and per mile, time spent on breaks, and your arrival time.
Also listed inUnit Converters
Your inputs
Quick start — try a typical case
Your result Live
Travel Time
5 h
350 km at 70 km/h
- Time in Hours
- 5
- Pace per km
- 0:51 min/km
- Pace per mile
- 1:23 min/mile
How this is calculated
Speed = Distance ÷ Time · Time = Distance ÷ Speed · Distance = Speed × Time · Pace = Time ÷ Distance
- Units
- Converted through metres and seconds using exact definitions (1 mi = 1,609.344 m; 1 knot = 1,852 m/h)
- Pace
- Minutes per km or per mile — the inverse of speed, used by runners
Speed, distance and time are linked by one formula: distance = speed × time. Give any two and the third follows. The calculator converts everything through metres and seconds, so you can mix units — a 350 km drive at 70 mph, or a 10 km run at 5:30 per km. Stops are added to the travel time, and the average speed including stops shows the realistic pace of a trip.
Assumptions & sources
- Speed is an average over the whole distance.
- Arrival time assumes departure and arrival in the same time zone.
- 1The International System of Units (SI Brochure) — BIPM
- 2Athletic Records and Human Endurance (Riegel, 1981) — American Scientist
Calculator ID TRV-SDT-001 · version 1.0.0
Common questions
How do I calculate travel time?
Divide the distance by the average speed: 350 km at 70 km/h takes 5 hours. Add stops for a realistic total.
What's the difference between speed and pace?
Speed is distance per time (km/h); pace is time per distance (minutes per km). A 6:00 min/km pace is 10 km/h.
Can I mix units?
Yes — enter the distance in miles and the speed in km/h, or anything else; everything is converted exactly behind the scenes.