Tool

Slider Calculator

Compute circumference, coverage, and margin of error for any bamboo diameter and slider configuration.

mm
50150 mm
mm
0.55 mm
mm
0.13 mm
sliders
1300

Circumference

270.18

mm

Pitch (P)

2.35

mm

Coverage

270.25

mm

Ideal Sliders

114

for ≤1% error

Error margin 0.03% — excellent
0%5%10%
With 115 sliders at 1.85 mm + 0.50 mm spacing, the gauge covers 270.25 mm of a 270.18 mm circumference — a 0.03% error margin, which is excellent.

Quick Input Pad

86

Reference Table

Pre-calculated values using a pitch of 2.30 mm (1.85 mm slider + 0.45 mm spacing).

Bamboo Diameter Circumference Sliders Needed Error Margin
70 mm219.91 mm~96~1.05%
80 mm251.33 mm~109~0.91%
90 mm282.74 mm~123~0.81%
100 mm314.16 mm~137~0.73%

How It Works

1

Bamboo Circumference

C = π × D — multiply bamboo diameter by π to get circumference.

C = π × D
2

Gauge Coverage

Pitch P = slider diameter + spacing. Coverage = number of sliders × pitch.

P = slider diameter + spacing | Coverage = N × P
3

Margin of Error

Percentage difference between actual circumference and coverage by the sliders.

Error (%) = |C - Coverage| / C × 100

Example — 86 mm Bamboo, 118 Sliders

Circumferenceπ × 86 ≈ 270.18 mm
Pitch1.85 + 0.45 = 2.30 mm
Coverage118 × 2.30 = 271.40 mm
Error Margin|270.18 − 271.40| / 270.18 × 100 ≈ 0.45%

Result: 0.45% — excellent accuracy for practical bamboo joinery.