Distance Calculator — from speed and time

How it works

This is the average-speed relation solved for distance. Since average speed is the distance travelled divided by the time taken (v = d ÷ t), rearranging gives:

d = v × t

Travel at a steady speed v for a time t and you cover a distance of v × t. It is unit-agnostic: enter the speed and time in matching units and the distance follows. Miles per hour with hours gives miles; kilometres per hour with hours gives kilometres; metres per second with seconds gives metres.

This assumes a constant average speed. If your speed varies, use your average speed over the whole trip — the single steady speed that would cover the same distance in the same time.

Worked example

Driving at 60 mph for 2.5 hours covers 60 × 2.5 = 150 miles. A highway run at 65 mph for 3 hours is 195 miles, a short walk at 3 mph for half an hour is 1.5 miles, and a flight cruising at 500 mph for 4 hours covers 2000 miles. Double the time at the same speed and you double the distance.

Frequently asked questions

What is the formula for distance?

Distance equals speed times time: d = v × t. It is the average-speed relation (speed = distance ÷ time) rearranged to solve for distance, so a steady speed over a known time gives the distance covered.

What units should I use?

Any units, as long as the speed and time match. Miles per hour with hours gives miles; km/h with hours gives kilometres; m/s with seconds gives metres. The calculator treats the numbers as unit-agnostic, so keep the time unit consistent between the speed and the time.

How is this different from the speed and travel-time calculators?

They solve the same relation, d = v × t, for different unknowns. The [speed](speed-calculator) calculator finds speed from distance and time; the [travel-time](travel-time-calculator) calculator finds time from distance and speed; this one finds distance from speed and time.

Does this work if my speed changes during the trip?

Use your **average** speed. The formula assumes one constant speed, but if you use the average speed over the whole journey — total distance ÷ total time — it gives the correct total distance. It will not capture how far you went in any single moment.

How far do I travel in 30 minutes at 60 mph?

Convert the time to hours first: 30 minutes is 0.5 hours, so distance = 60 × 0.5 = 30 miles. Always express the time in the same unit as the speed's time part (hours for mph) before multiplying.

Can I use this for running or cycling pace?

Yes. Enter your speed (for example 8 mph running or 15 mph cycling) and the time, and it returns the distance. If you know your pace in minutes per mile instead, convert it to speed first, or use a dedicated pace calculator.