Distance Calculator (from speed and time)

distance = speed × time. Useful for "if I drive X mph for Y hours, how far?" questions.

Inputs

Result

Loading calculator…
—

General calculation reads

Amazon affiliate
How Not to Be Wrong
Jordan Ellenberg - math thinking
Shop on Amazon
The Joy of X
Steven Strogatz - accessible math
Shop on Amazon
Scientific calculator (Casio fx-991EX)
Shop on Amazon

As an Amazon Associate we may earn from qualifying purchases. This does not add cost for you.

How to use this calculator

  • Enter speed.
  • Enter time as hours + minutes.
  • Read distance.

About this calculator

distance = speed × time, the most basic kinematic equation. Plug in any speed and any duration. Useful for trip planning, ETA estimation, and homework problems. Reverse: time = distance / speed (use the average-speed calculator).

Frequently asked

Does this assume constant speed?+
Yes — it's d = vt, which only holds for constant velocity. For variable speed, use average speed.
How far can I drive in 8 hours legally?+
In US trucking, federal hours-of-service caps driving at 11 hours/day. Personal driving has no such cap, but DOT recommends breaks every 2 hours.
What's a typical road trip distance per day?+
Solo driver: 500-700 miles in 8-10 hours including stops. With breaks, expect 50-65 mph average.
Why is my actual trip farther than computed?+
You probably didn't hold constant speed. Plus GPS-routed mileage often differs from straight-line.
Can speed be in km/h?+
Yes — toggle the unit. The calculator returns distance in matching units, plus the cross-unit conversion.

Related calculators

Average Speed Calculator
speed = distance / time. Pick units and read average speed in mph or km/h.
Road Trip Time Calculator
How long will a road trip take? Distance / speed plus breaks and fuel stops.
Hours to Arrival Calculator
Given remaining distance and speed, when will you arrive?
Trip Fuel Cost Calculator
Estimate fuel cost from trip distance, fuel economy, and price per unit. Toggle miles/km, MPG / km per L / L per 100 km, and $/gal vs $/L.
Miles Per Tank Calculator
Estimate how far you can drive on a full tank from MPG and tank capacity.
Acceleration Calculator
a = (v_final − v_initial) / time. Useful for 0-60 times and physics problems.

More tools you might like

Hand-picked tools that pair well with this one — same audience, same intent.

Average Speed Calculator
Calc

speed = distance / time. Pick units and read average speed in mph or km/h.

Road Trip Time Calculator
Calc

How long will a road trip take? Distance / speed plus breaks and fuel stops.

Miles Per Tank Calculator
Calc

Estimate how far you can drive on a full tank from MPG and tank capacity.

Hours to Arrival Calculator
Calc

Given remaining distance and speed, when will you arrive?

Acceleration Calculator
Calc

a = (v_final − v_initial) / time. Useful for 0-60 times and physics problems.

Time-Off Request Form
Docs

Employee time-off / PTO request — dates, leave type, manager approval signature.