Bike Size Calculator

The following bike size calculator will calculate the bike size based on the bike type and your inseam length (how to measure it?).

Simply choose the bike type, input your inseam length and get the size recommendation.

Choose the Bike Type
How to choose a bike?
mountain bike icon 250px newMTB
Cross-Country, Trail,
and Enduro Bikes
hybrid bike icon 250px newHYBRID
Trekking, Commuter,
and City Bikes
road bike icon 250px newROAD
Road, Gravel,
and CX Bikes
Enter Your Inseam Length
How to measure your inseam?

inch cm


Please remember that this calculator provides estimates and should only be used as a general guide.
I recommend you double-check the bike size chart of the bike manufacturer for more accurate results.

How to Measure Inseam Length?

To measure your inseam length, follow these 5 simple steps or watch the video below:

  1. Prepare a 0.75 to 1-inch (1.9-2.5cm) thick book and a tape measure.
  2. Take off your shoes and stand with your back to the wall.
  3. Put the book in your inseam, firmly pull it up and hold it with your tights. Make sure the book is pressed against the wall on one side.
  4. Measure the length from the top of the book to the floor.
  5. Take the measurement.

NOTE: The inseam for choosing the right bike size is different (a few inches longer) from the inseam used to choose the pants’ size. Remember that inaccurate inseam length may affect the recommended bike size.

Before you proceed to the bike size charts, measure your inseam

Once you measure your inseam length (and eventually also your height), you will be able to compare it with the bike size chart of the specific bike type. Based on it, you can choose the correct size.

Why Is the Right Bike Size Important?

Choosing the right bike size is crucial for riding comfort, injury prevention, and performance.

When a bike is a proper size for an individual, it allows for optimal power transfer to the pedals and proper alignment of the joints and muscles.

This can lead to improved speed and efficiency and reduced risk of knee, back, or neck pain.

On the other hand, a bike that is too small or large can cause strain on the body, leading to discomfort and even injuries.