How do I enter 1 hour 30 minutes?

Use 1.5 hours or 1:30:00. The shorter 1:30 is treated as 1 minute 30 seconds.

Should I use peak speed or average speed?

Use average speed for the full interval you want to model.

Does fuel cost use U.S. units?

Yes. The optional fuel block uses miles, miles per gallon and dollars per gallon.

Speed Time Distance Calculator

Solve for travel time, average speed or distance with mph, km/h, formula, knots, HH:MM:SS time input and optional fuel cost.

Solve for

TimeSpeedDistance

Speed

Unit

Distance

Unit

Travel time

01:40:00.00e+0

Hours decimal

1.667 h

Minutes

100 min

Seconds

6,000 s

Explanation

For 100 km at 60 km/h, travel time is 1.667 h.

In clock format: 01:40:00.00e+0.

Estimate fuel use and trip cost

Solve speed, time or distance

This page serves the practical English intent for road trips, running, cycling and quick physics checks: enter any two of speed, time and distance to solve the third.

d = v t

d is distance, v average speed and t elapsed time.

v = \frac{d}{t}

Average speed uses total elapsed time, including stops when you want whole-trip speed.

t = \frac{d}{v}

Travel time assumes the entered average speed is maintained.

Average speed caveat

Traffic, stops, turns, weather and terrain are not modeled. For navigation, use a route planner; for acceleration problems, use the SUVAT calculator.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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