Calculadora de Velocidade

v = d/t — velocidade média com conversões.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

m/s
20,000 m/s
km/h
72,00 km/h
mph
44,74 mph

Formula

v = d/t

About this calculator

The average speed calculator allows you to determine the average speed of an object from the distance traveled and the time taken, using the formula v = d/t. It is useful for solving basic kinematics problems, planning trips, or analyzing vehicle performance. The tool accepts various units of distance (meters, kilometers, miles) and time (seconds, minutes, hours), automatically converting to the desired speed unit.

To use, enter the distance value and select its unit; then enter the time and its unit. The calculator will display the average speed in the chosen unit (m/s, km/h, mph, etc.). The calculation is instantaneous and requires no prior formula knowledge. It is ideal for students, drivers, and professionals needing quick results.

When to use: on trips to estimate remaining time, in sports to measure pace, or in school physics experiments. Caution: the formula gives average speed, not instantaneous speed. On routes with stops or accelerations, actual speed varies. Also, ensure distance and time units are compatible to avoid conversion errors.

The calculator is based on the fundamental kinematics equation, valid for uniform rectilinear motion. For varied motion, instantaneous speed differs. Use the tool for a useful approximation in everyday situations, remembering that factors like traffic or weather can affect the actual result.

Frequently asked questions

What is the difference between average speed and instantaneous speed?

Average speed is total distance divided by total time, while instantaneous speed is the speed at a specific moment. The calculator provides average speed.

Can I use the calculator to calculate travel time?

Yes, if you know distance and desired speed, you can calculate time. Just enter the values and the tool does the conversion.

Does the calculator work with imperial units?

Yes, it accepts miles, feet, inches for distance and hours, minutes, seconds for time, converting to mph or other units.

What does 'average speed' mean on a trip with stops?

It is total distance divided by total time, including stops. For example, a 100 km trip in 2 hours gives 50 km/h, even with stops.

How do I convert km/h to m/s manually?

Divide the km/h value by 3.6. Example: 72 km/h ÷ 3.6 = 20 m/s. The calculator does this automatically.

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