Menu
Home Blog Chi siamo Contattaci Mappa del sito

Velocità media Calcolatrice

Il modo più veloce per calcolare velocità, distanza e tempo con precisione.

Cosa vuoi calcolare?
Ore
Min
Sez
Velocità calcolata
0.00 km/h
Equivalenti
In attesa di input...

Average Speed Definition

Average speed equals the total distance traveled divided by the total time taken to cover that distance. The Average Speed Calculator computes this value in miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), and feet per second (ft/s).

Average speed is a scalar quantity — it has magnitude but no direction. A car that drives 200 miles (321.9 km) in 4 hours has an average speed of 50 mph (80.5 km/h), regardless of the route taken or direction changes during the trip.

The Speed Distance Time Calculator uses 3 variables: speed, distance, and time. Knowing any 2 of these values lets you calculate the third using the average speed formula.

Build the Definition

Click the correct terms to complete the formula

Average Speed =
?
÷
?

Average Speed Formula

The Average Speed formula is Speed = Distance / Time (s = d/t). Questa formula ha 3 riarrangiamenti che risolvono qualsiasi variabile sconosciuta:

  1. s = d / t — speed equals distance divided by time
  2. d = s × t — distance equals speed times time
  3. t = d / s — time equals distance divided by speed

The output unit depends on the input units. Distance in miles and time in hours produces miles per hour (mph). Distance in kilometers and time in hours gives kilometers per hour (km/h). Distance in meters and time in seconds yields meters per second (m/s).

Formula Triangle

Click any variable to see its formula

D S T DISTANCE SPEED TIME
Click a variable above

How to Calculate Average Speed

To calculate the average speed, follow these 3 steps:

  • Step 1: Measure the total distance traveled in miles, kilometers, or meters. Use a car's odometer, Google Maps, or a GPS device to record the distance.
  • Step 2: Record the total time taken in hours, minutes, or seconds. Subtract any rest stops from the total trip duration to get actual travel time.
  • Step 3: Divide distance by time utilizzando la formula: Velocità = Distanza/Tempo (s = d/t) .

Example: A car covers 250 miles (402.3 km) in 5 hours. Average speed = 250 / 5 = 50 mph (80.5 km/h).

For trips with stops, subtract idle time. A bus travels 180 miles (289.7 km) in 4 hours with 30 minutes of stops. Travel time = 3.5 hours. Average speed = 180 / 3.5 = 51.4 mph (82.8 km/h).

Step-by-Step Walkthrough

Click each step to complete it

1
Measure distance: 250 miles (402.3 km)
2
Record time: 5 hours (no stops)
3
Calculate: 250 ÷ 5 = 50 mph (80.5 km/h)

How to Use this Average Speed Calculator

To use this Average Speed Calculator, follow 3 steps:

  • Step 1: Select the calculation mode — choose Speed, Distance, or Time from the mode selector at the top of the calculator.
  • Step 2: Enter known values into the distance input and time input fields. Select the measurement units from the dropdown menus (miles, kilometers, meters, hours, minutes, seconds).
  • Step 3: Click the calculate button to view results in the result display area. The calculator shows the answer with a step-by-step formula breakdown and automatic unit conversions.

The Average Speed Calculator supports input in hh:mm:ss format and converts between mph, km/h, m/s, and ft/s automatically.

Calculator Guide

Click each step to walk through the process

1
Select mode: Speed / Distance / Time
2
Enter values: Distance = 120 mi, Time = 2 hr
3
Result: 60 mph (96.6 km/h)

Average Speed Calculator With Distance and Time

Per calcolare la velocità media con distanza e tempo, inserire la distanza totale percorsa e il tempo di viaggio nel calcolatore velocità/distanza/tempo. La formula velocità = distanza / tempo (s = d/t) produce il risultato.

Example 1: A cyclist rides 30 miles (48.3 km) in 2 hours. Average speed = 30 / 2 = 15 mph (24.1 km/h).

Example 2: A train covers 200 kilometers (124.3 miles) in 2.5 hours. Average speed = 200 / 2.5 = 80 km/h (49.7 mph).

The Average Speed Calculator accepts distance in miles, kilometers, or meters and time in hours, minutes, or seconds. The formula engine handles all unit conversions automatically.

Quick Speed Calculator

Enter distance and time to calculate speed

÷
=

Average Speed Calculator Without Time

To find travel time without knowing time directly, rearrange the average speed formula to tempo = distanza / velocità (t = d/s) . Enter the known distance and speed values to compute travel time.

To find distance when distance is unknown, use distance = speed × time (d = s × t) .

Example: A bus travels 120 miles (193.1 km) at an average speed of 40 mph (64.4 km/h). Time = 120 / 40 = 3 hours.

This rearrangement is useful for trip planning — enter the distance from Google Maps and the expected average speed to estimate the total trip duration before departure.

Time Finder

Adjust distance and speed to compute travel time

Time = 2.50 hours (2h 30m)

Average Speed Calculator for Multiple Speeds

The correct method to calculate average speed for equal distances at different speeds is the harmonic mean, not the arithmetic mean. The arithmetic mean gives an incorrect result because the object spends more time at the slower speed.

Average Speed = 2 × (S₁ × S₂) / (S₁ + S₂)

Example: A car drives 60 mph (96.6 km/h) for the first half and 40 mph (64.4 km/h) for the second half of an equal-distance trip. The arithmetic mean = 50 mph (wrong). The harmonic mean = 2 × (60 × 40) / (60 + 40) = 48 mph (77.2 km/h) (correct).

The harmonic mean produces a lower value than the arithmetic mean because the vehicle spends more time traveling at the slower speed, which pulls the average speed calculation down.

Harmonic Mean Calculator

Enter 2 speeds for equal distances — see correct vs incorrect average

✗ Arithmetic Mean (Wrong)
50.00 mph
✓ Harmonic Mean (Correct)
48.00 mph

Average Speed Calculator with Hours and Minutes

Convert time in hours, minutes, and seconds (hh:mm:ss) to decimal hours before applying the Average Speed formula. The conversion formula:

Decimal Hours = Hours + (Minutes / 60) + (Seconds / 3600)

Example: 2 hours 30 minutes 45 seconds = 2 + (30/60) + (45/3600) = 2 + 0.5 + 0.0125 = 2.5125 hours.

A trip of 150 miles (241.4 km) in 2 hours 30 minutes 45 seconds = 150 / 2.5125 = 59.7 mph (96.1 km/h).

The Average Speed Calculator accepts time in hh:mm:ss format directly and converts to decimal hours automatically.

Time Format Converter

Enter hours, minutes, seconds to get decimal hours

Decimal Hours 2.5125 hours

Average Speed Calculator for Multiple Legs

For trips with multiple legs, add the total distance traveled across all segments and divide by the total time taken. Each leg may have a different speed and distance across varying terrain types.

Example: A delivery van completes 3 legs:

  • Tappa 1: 120 miglia (193,1 km) in 2 ore = 60 mph
  • Tappa 2: 90 miglia (144,8 km) in 1,5 ore = 60 mph
  • Tappa 3: 60 miglia (96,6 km) in 1 ora = 60 mph

Total distance = 270 miles (434.5 km). Total time = 4.5 hours. Average speed = 270 / 4.5 = 60 mph (96.6 km/h).

This method applies for last-mile delivery vans, bicycle courier routes, and any multi-segment journey with stops.

Multi-Leg Calculator

Enter distance and time per leg — totals update live

Leg Distance (mi) Time (hrs) Speed (mph)
Leg 1 60.0
Leg 2 60.0
Leg 3 60.0
Total 270.0 4.50 60.00

Units of Average Speed

Average speed uses distance-per-time units. The 4 most common units are:

  • 1. Miles per hour (mph) — used in the United States and United Kingdom for road speed
  • 2. Kilometers per hour (km/h) — used in most countries worldwide for automotive speed
  • 3. Meters per second (m/s) — the SI base unit for speed, used in scientific contexts
  • 4. Feet per second (ft/s) — used in engineering and some physics applications

Conversion factors: 1 mph = 1.60934 km/h = 0.44704 m/s = 1.46667 ft/s. The metric unit of speed in the International System of Units (SI) is meters per second (m/s).

Live Unit Converter

Enter a speed value and select the input unit

60.000 mph
96.561 km/h
26.822 m/s
88.000 ft/s

Average Speed vs. Average Velocity

Average speed is a scalar quantity — it equals total distance traveled divided by total time taken and has no direction. Average velocity is a vector quantity — it equals total displacement divided by total time and includes direction.

For a round trip with the same start and end point, average speed is greater than zero because total distance traveled is always positive. Average velocity for a round trip equals zero because displacement (net change in position) equals zero.

Example: A car drives 100 miles (160.9 km) east and returns 100 miles west in 4 hours total. Total distance = 200 miles (321.9 km). Displacement = 0 miles. Average speed = 200 / 4 = 50 mph. Average velocity = 0 / 4 = 0 mph. Use the Displacement Calculator to find displacement for specific paths.

Average Speed

Scalar quantity (magnitude only)

= Total Distance / Time

Always ≥ 0

Round trip: 50 mph

VS
Average Velocity

Vector quantity (magnitude + direction)

= Displacement / Time

Can be zero or negative

Round trip: 0 mph

Percorso di andata e ritorno

Osserva il punto viaggiare avanti e indietro: la distanza aumenta, lo spostamento ritorna a zero

Inizio/Fine Punto di svolta

Average Speed vs Instantaneous Speed

Average speed covers the entire trip — total distance traveled divided by total time taken. Instantaneous speed is the speed at one specific moment, displayed on a speedometer or GPS device.

A car's speedometer shows instantaneous speed, which changes constantly during a trip. Average speed smooths all these speed variations into a single value for the entire journey.

Example: A car trip shows speedometer readings between 30 mph (48.3 km/h) and 70 mph (112.7 km/h) at various moments during peak congestion periods and highway stretches. The average speed for the entire 120-mile (193.1 km) trip over 2 hours = 60 mph (96.6 km/h).

Speedometer Comparison

Average stays constant while instantaneous fluctuates

0102030405060708090100
Media: stabile
0102030405060708090100
Istantaneo: varia

Average Speed Vs Constant Speed

Constant speed means an object covers equal distances in equal time intervals throughout the journey. Average speed equals total distance traveled divided by total time taken over the entire trip.

When an object moves at constant speed, average speed equals that constant speed. When speed varies — due to acceleration, deceleration, or stops — average speed differs from the speed at any given moment.

Example 1: A car using cruise control at 60 mph (96.6 km/h) on a highway has both a constant speed and an average speed of 60 mph.

Example 2: A car in city traffic varies between 0 mph and 45 mph (72.4 km/h) during school zone hours and peak congestion periods, with an average speed of 25 mph (40.2 km/h).

Constant vs Varying Speed

Both dots finish at the same time — same average speed, different patterns

Constant
Varying

Average Speed from Speed-Time Graph

The area under a speed-time graph represents total distance traveled. To find average speed from a speed-time graph, follow 3 steps:

  1. Calculate the total area under the speed curve using geometric shapes (rectangles, triangles, trapezoids).
  2. Read the total time from the horizontal axis (start to end).
  3. Divide total area by total time: Average Speed = Total Area / Total Time.

For a rectangular region at constant speed, area = speed × time. For a triangular region with uniform acceleration from zero, area = ½ × base × height.

Speed-Time Graph

The shaded area equals total distance traveled

Average Speed from Velocity-Time Graph

A velocity-time graph shows velocity (speed with direction) over time. The area under the curve represents displacement, not total distance.

  1. Areas above the time axis indicate positive displacement (forward movement).
  2. Areas below the time axis indicate negative displacement (backward movement).

To find total distance from a velocity-time graph, sum the absolute values of all areas. Average speed = total distance / total time. Average velocity = net displacement / total time.

Velocity-Time Graph

Blue area = forward distance, Red area = backward distance

Common Mistakes When Calculating Average Speed

There are 5 common mistakes when calculating average speed. Click each card below to see the explanation and how to avoid the error.

Common Error
Using Arithmetic Mean Instead of Harmonic Mean
Quando si calcola la velocità media per velocità diverse su distanze uguali, la media aritmetica dà un risultato sbagliato. Utilizza la media armonica: Velocità media = 2 x (S1 x S2) / (S1 + S2) . Il veicolo trascorre più tempo alla velocità più lenta, il che porta la media reale al di sotto della media semplice.
Fai clic per rivelare ->
Common Error
Forgetting to Subtract Rest Stops
Average speed uses actual travel time, not total elapsed time. Subtract rest stops, refueling breaks, and idle time from the total trip duration before dividing. A 5-hour trip with 1 hour of stops has 4 hours of travel time.
Fai clic per rivelare ->
Common Error
Mixing Units Without Converting
Distance in miles with time in minutes produces an incorrect result unless converted. Convert minutes to hours (divide by 60), or kilometers to miles (multiply by 0.621371), before applying the formula speed = distance / time.
Fai clic per rivelare ->
Common Error
Confusing Speed with Velocity
La velocità media utilizza la distanza totale (scalare, sempre positiva). La velocità media utilizza lo spostamento (vettore, può essere zero per i viaggi di andata e ritorno). Un’auto che percorre 100 miglia all’andata e 100 miglia al ritorno ha una velocità media > 0 ma velocità media = 0.
Fai clic per rivelare ->
Common Error
Using Instantaneous Readings for Average
A speedometer or GPS shows instantaneous speed at one moment, not average speed. Average speed requires total distance traveled divided by total time taken. Instantaneous speed readings during peak congestion periods or highway stretches do not represent the overall average.
Fai clic per rivelare ->

Average Speed Examples and Practice Questions

Practice these 5 average speed calculation problems. Click "Show Solution" to see the step-by-step answer for each question.

Q1: A runner covers 10 km (6.21 miles) in 50 minutes. Calculate the runner's average speed in km/h and mph.

Step 1: Convert time: 50 minutes = 50 / 60 = 0.833 hours.

Step 2: Apply formula: Speed = Distance / Time = 10 / 0.833 = 12.0 km/h.

Step 3: Convert: 12.0 km/h × 0.621371 = 7.46 mph.

Q2: A car travels 180 miles (289.7 km) in 3 hours 15 minutes. Find the average speed in mph.

Step 1: Convert time: 3h 15m = 3 + (15/60) = 3.25 hours.

Step 2: Apply formula: Speed = 180 / 3.25 = 55.38 mph (89.13 km/h).

Q3: A cyclist rides 25 km (15.53 miles) at 20 km/h, then 25 km at 30 km/h. Calculate the average speed for the entire trip.

Step 1: Time for leg 1: 25 / 20 = 1.25 hours.

Step 2: Time for leg 2: 25 / 30 = 0.833 hours.

Step 3: Total distance = 50 km. Total time = 2.083 hours.

Step 4: Average speed = 50 / 2.083 = 24.0 km/h (14.91 mph). Note: the answer is NOT 25 km/h (the arithmetic mean).

Q4: A train departs at 9:00 AM and arrives at 11:45 AM, covering 330 km (205 miles). Find the average speed.

Step 1: Calculate time: 11:45 - 9:00 = 2 hours 45 minutes = 2.75 hours.

Step 2: Apply formula: Speed = 330 / 2.75 = 120 km/h (74.56 mph).

Q5: A car drives 60 km at 40 km/h and returns at 60 km/h. Find the average speed for the round trip.

Step 1: Time going: 60 / 40 = 1.5 hours.

Step 2: Time returning: 60 / 60 = 1.0 hours.

Step 3: Total distance = 120 km. Total time = 2.5 hours.

Step 4: Average speed = 120 / 2.5 = 48 km/h (29.83 mph). The harmonic mean gives the correct answer for equal-distance round trips.

Altri calcolatori della velocità media

La famiglia di calcolatori di velocità media copre tutti i problemi di velocità che potresti incontrare: dal ciclismo all'escursionismo, alla fisica delle molecole di gas, alla meccanica orbitale, ai test della banda larga e alla lettura del ritmo. Ciascun calcolatore riportato di seguito è creato appositamente per il proprio scenario, con la propria formula, input e visualizzazione interattiva.

Domande frequenti

La distanza totale percorsa e il tempo totale impiegato sono le 2 misurazioni necessarie per calcolare la velocità media. La formula velocità = distanza/tempo (s = d/t) utilizza questi 2 valori per produrre il risultato in miglia orarie (mph), chilometri orari (km/h) o metri al secondo (m/s).

Misura la distanza percorsa durante quello specifico intervallo di tempo e dividi per il tempo trascorso. Velocità media per un intervallo = distanza dell'intervallo/tempo dell'intervallo. Ciò fornisce la tariffa media di viaggio solo per quel segmento.

No, la velocità media è sempre zero o positiva. La velocità media è una quantità scalare che utilizza la distanza totale (sempre positiva) divisa per il tempo totale (sempre positivo). La velocità media può essere negativa perché la velocità include la direzione.

Una buona velocità media per la corsa varia da 5 mph (8 km/h) per i principianti a 6-8 mph (9,7-12,9 km/h) per i corridori intermedi. I maratoneti d'élite mantengono 12-13 mph (19.3-20.9 km/h). Utilizza un calcolatore della velocità di corsa o un dispositivo GPS per monitorare il ritmo della corsa durante le strategie di ritmo della maratona.

Una buona velocità media per il ciclismo è 12-15 mph (19.3-24.1 km/h) per i ciclisti occasionali, 15-20 mph (24.1-32.2 km/h) per i ciclisti abituali e 20-28 mph (32.2-45.1 km/h) per ciclisti agonisti. La velocità varia in base alle regolazioni del rapporto di trasmissione, alla pressione dei pneumatici e al tipo di terreno.

Aggiungi la distanza totale percorsa su tutti i segmenti. Aggiungi il tempo di viaggio totale tra le fermate, escluso il tempo trascorso in sosta. Dividere la distanza totale per il tempo di viaggio totale: velocità media = distanza totale / tempo di viaggio totale.

Sì, riorganizza la formula in tempo = distanza/velocità (t = d/s). Inserisci la distanza e la velocità media nel calcolatore della velocità media per calcolare il tempo di viaggio in ore, minuti o nel formato hh:mm:ss.

No, la velocità media e la velocità media sono quantità diverse. La velocità media utilizza la distanza totale percorsa (scalare, sempre >= 0). La velocità media utilizza lo spostamento (il vettore, include la direzione, può essere 0 per i viaggi di andata e ritorno). Utilizzare Displacement Calculator per calcoli basati sulla velocità.

Misura la distanza in chilometri e il tempo in ore, quindi dividi: velocità media (km/h) = distanza (km) / tempo (ore). Esempio: 150 km in 2 ore = 75 km/h (46,6 mph). Converti mph in km/h moltiplicando per 1,60934.

Misura la distanza in miglia e il tempo in ore, quindi dividi: velocità media (mph) = distanza (miglia) / tempo (ore). Esempio: 120 miglia in 2 ore = 60 mph (96,6 km/h). Converti km/h in mph moltiplicando per 0,621371.

Sì, la velocità media è uguale a zero solo quando la distanza totale percorsa è uguale a zero: l'oggetto non si è mosso affatto. Qualsiasi movimento, anche il ritorno al punto di partenza, risulta in una velocità media maggiore di zero perché la distanza totale è positiva.

Aggiungi la distanza per entrambe le direzioni per ottenere la distanza totale. Aggiungi il tempo per entrambe le direzioni per ottenere il tempo totale. Dividi la distanza totale per il tempo totale. NON calcolare la media aritmetica delle due velocità: utilizzare la media armonica per distanze uguali: Average Speed = 2 x (S1 x S2) / (S1 + S2).

Riorganizza la formula per ricavare la distanza da altri valori noti, quindi applica velocità = distanza/tempo. Senza alcun riferimento di distanza o velocità, non è possibile calcolare la velocità media: è necessario conoscere almeno 2 delle 3 variabili (velocità, distanza, tempo).

La pendenza di un grafico distanza-tempo rappresenta la velocità. Velocità media per l'intero viaggio = salita totale (variazione della distanza) / corsa totale (variazione del tempo) dal punto di partenza al punto finale sul grafico. Una pendenza più ripida indica una velocità maggiore.

Calcolare l'area totale sotto la curva velocità-tempo, utilizzando valori assoluti per le aree sotto l'asse del tempo. Distanza totale = somma di tutte le aree assolute. Velocità media = distanza totale / tempo totale. Velocità media = spostamento netto (aree sopra meno aree sotto) / tempo totale.

La velocità media è una quantità scalare: ha una grandezza (un numero con unità come mph o km/h) ma nessuna direzione. La velocità media è la controparte vettoriale che include sia la magnitudo che la direzione. Le quantità scalari come la velocità e la distanza differiscono dalle quantità vettoriali come la velocità e lo spostamento.