## How are watts calculated on a bike?

To work out your power-to-weight ratio figure, simply divide your maximum power output (in watts) by your body mass in kilograms (kg). For example, an 80kg rider with a maximum sustainable power output of 280 watts has a power-to-weight ratio of 3.5 watts per kilo (commonly abbreviated as 3.5W/kg or 3.5W. kg-1).

What is watts on stationary bike?

But what does that number even mean, and is it important to your workout? Watts is a measurement of the power you are producing. It is how much energy is needed to overcome inertia and make things go, like pedaling your bike, climbing stairs, powering the elliptical or even running on a treadmill.

How is power measured on a stationary bike?

The crank-based power meter is usually located on the cranks of the exercise bike. It helps to measure torque using a strain gauge. This gauge is inside the crank spider power meter. You need to know that these units require specific cranksets.

### How many watts is 25 mph?

Cycling Power

Speed – kmh (mph) Power (watts) Increase in power needed to increase speed by 2.5kmh
20 (12.5) 75
22.5 (14) 95 20
25 (15.6) 120 25
27.5 (17.2) 148 28

What is a good power to weight ratio cycling?

Beginners or Cat 5s range from 2.5 to 3.2 watts/kg for men and 2.1 to 2.8 watts/kg for women; Cat 3 racers typically range 3.7 to 4.4 watts/kg (men) and 3.2 to 3.8 watts/kg (women).

What is a good wattage cycling?

The article claims that a typical fit cyclist might be able to crank out 250 to 300 watts as an average for a 20 minute FTP (functional threshold point) test, while the pros usually average 400 watts.

#### How many watts do you get on a bike?

Utilize cycling power estimates to gain an idea of how much power in watts you are generating. At 12.5 mph, you’ll generate about 75 watts on average.

Which is the correct formula for cycling wattage?

The cycling wattage formula that we use looks like this: P = (Fg + Fr + Fa) * v / (1 – loss) where: P is your power, Fg is the resisting force due to gravity, Fr is the rolling resistance force, Fa is the aerodynamic drag, v is your speed in m/s, loss is the percentage loss in power.

What’s the power output of a bike during exercise?

One of the best measures of athletic performance is power output during exercise. Measured in watts, it’s exactly equivalent to the power that lights a bulb or moves a car. Tour de France cyclists run at about 500 watts for hours on end, and can hit output of 1500 watts in short bursts.

## How to calculate watts on a cardio machine?

You could also use the watts feature to determine your caloric burn for a period of time, if weight loss is your goal. Simplified, without a long physics lesson, we can use the following formula: Energy (kCal or calories) = Av Power (Watts) x Duration (hours) x 3.6