Belt Length Calculator
ISO 4184Pulley diameter + center distance → belt length + standard size matching. Supports V-belts and serpentine belts.
Input Parameters
INPUT PARAMETERS
12.0
260 in
4.0
124 in
6.0
136 in
Calculation Result
V-Belt · inch
Deviation -0.52%
Theoretical Length
39.8in
Formula calculation
Recommended Standard
40in
Recommended Size
Belt TypeV-Belt
Small Pulley Dia (D1)4 in
Large Pulley Dia (D2)6 in
Center Distance (C)12 in
Drive Ratio (D2/D1)1.50:1
Theoretical Length39.79 in
Recommended Standard40 in
Deviation-0.52%
Standard V-Belt Size Table
74 sizes (inches)
101112131415161718192021222324252627283031323334353637383940414243444546474850515253545556575860626364656668707275788084859096100105110120128132136140144158162
Theoretical length needs adjustment based on pulley groove profile and tension. Measure or consult your supplier for actual selection.
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