Bike Frame Size Calculator

Frame size from inseam and riding style.

Inseam length (cm)

Height (cm)

Bike type (0-3)

Arm length (cm)

Tab to move between fields

Frame size (cm)

54.5

Frame size (inches)21.5

Standover clearance (cm)20.5

Effective top tube (cm)63.7

Suggested stem (cm)6

T-shirt size (0=XXS..7=XXL)4

Bike Type NameRoad

How to Use This Calculator

How the result changes with Inseam length (cm)

Inseam length (cm): Inside leg measurement from floor to crotch in centimeters.
Height (cm): Your total height in centimeters.
Bike type (0-3): 0 = Road, 1 = Mountain, 2 = Hybrid/City, 3 = Touring.
Arm length (cm): Arm length from shoulder to wrist in cm (for reach estimation).

Frame size (cm): Recommended frame size in centimeters (center-to-top measurement).
Frame size (inches): Frame size converted to inches (common for MTB sizing).
Standover clearance (cm): Estimated clearance between crotch and top tube. Road: aim for 2-5 cm, MTB: 5-10 cm.
Effective top tube (cm): Estimated effective top tube length for your proportions.
Suggested stem (cm): Approximate stem length for proper reach.
T-shirt size (0=XXS..7=XXL): General size label: 0=XXS, 1=XS, 2=S, 3=M, 4=M/L, 5=L, 6=XL, 7=XXL.

Identify Input Parameters
4 parameters
Inseam length (cm) = 82, Height (cm) = 178, Bike type (0-3) = 0, Arm length (cm) = 63 = 4 input(s) provided
Calculate Frame size
54.5 = 54.5
Calculate Frame size
Frame size = frameSizeCm / 2.54
21.5 = 21.5
Calculate Standover clearance
Standover clearance = inseamCm - standoverHeight
20.5 = 20.5