গড় গতি ক্যালকুলেটর

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.

The Average Speed formula is Speed = Distance / Time (s = d/t) এই সূত্রটিতে 3টি পুনর্বিন্যাস রয়েছে যা কোনও অজানা পরিবর্তনশীলের জন্য সমাধান করে:

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).

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 সূত্র ব্যবহার করে: গতি = দূরত্ব / সময় (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).

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.

দূরত্ব এবং সময়ের সাথে গড় গতি গণনা করতে, স্পীড ডিসটেন্স টাইম ক্যালকুলেটরে ভ্রমণের মোট দূরত্ব এবং ভ্রমণের সময় লিখুন। সূত্র গতি = দূরত্ব / সময় (s = d/t) ফলাফল তৈরি করে।

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.

To find travel time without knowing time directly, rearrange the average speed formula to সময় = দূরত্ব / গতি (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.

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.

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.

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

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.

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:

• লেগ 1: 120 মাইল (193.1 কিমি) 2 ঘন্টায় = 60 mph
• লেগ 2: 90 মাইল (144.8 কিমি) 1.5 ঘন্টায় = 60 mph
• লেগ 3: 1 ঘন্টায় 60 মাইল (96.6 কিমি) = 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.

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).

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).

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).