Bike Calculator

The Bike Power and Energy Calculator helps users estimate the power required and calories burned while cycling based on rider weight, bike weight, speed, road grade, headwind, temperature, and riding position.

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How to Use the Bike Power and Energy Calculator

This guide will walk you through the steps to effectively utilize the Bike Power and Energy Calculator for determining the power requirements and energy expenditure during cycling.

Step 1: Enter Basic Data

  • Rider Weight (kg): Start by inputting your weight. Ensure that the value is between 30 kg and 200 kg. You can use increments of 0.1 kg for more precise measurements.
  • Bike Weight (kg): Enter the weight of your bike, which should be between 5 kg and 30 kg. Adjust the value in steps of 0.1 kg as needed.

Step 2: Input Cycling Conditions

  • Speed (km/h): Specify your cycling speed. The acceptable range is between 1 km/h and 100 km/h, with increments of 0.1 km/h.
  • Road Grade (%): Provide the road grade as a percentage. It can be any value from -45% (a downhill slope) to 45% (an uphill slope), with 0.1% increments.
  • Headwind (km/h): Indicate the headwind speed you are facing. Enter a value between 0 km/h and 100 km/h, in steps of 0.1 km/h.
  • Temperature (°C): Input the ambient temperature where you are cycling. It should be within the range of -20°C to 50°C, with a precision of 0.1°C.

Step 3: Select Riding Position

  • Riding Position: Choose your riding position from the options available: Upright, Drops, or Aero. Each position affects the air resistance you will encounter.

Step 4: View the Results

After entering all the required fields, the calculator will provide you with several results:

  • Total Mass: This value is a simple addition of the rider’s weight and the bike’s weight. It will be displayed in kilograms with one decimal point precision.
  • Rolling Resistance Power: The power needed to overcome rolling resistance, displayed in watts.
  • Gravity Power: The power required to counteract the gravitational force due to road grade, shown in watts.
  • Air Resistance Power: The power needed to overcome air resistance, which is affected by speed, headwind, and riding position, expressed in watts.
  • Total Power Required: Sum of all power components needed to maintain the input speed, measured in watts.
  • Calories Burned Per Hour: An estimate of the calories you’ll burn per hour at the specified conditions, shown as kcal/hour.

Use these results to better understand the effort required for your specific cycling conditions and to tailor your training accordingly.