Dryer Drum RPM Calculator
Motor RPM → drum RPM. Idler pulley size doesn’t change speed.
Inputs
Formula: Drum RPM = Motor RPM × (Motor Pulley Ø ÷ Drum Ø)
Results
Drum RPM
—
Belt Speed
—
at motor pulley
Drum Surface
—
≈ belt speed
Enter values to see advice.
Quick Notes
- Idler Ø doesn’t affect RPM (tension only).
- Typical residential drum: ~40–60 RPM.
- Maintain adequate belt wrap to avoid slip.
Modern Resistor Calculator
Color code • Series/Parallel • Voltage divider • LED resistor • Nearest E-series
Resistor Color Code
4 / 5 / 6 band
Visualization updates live
Equivalent ResistanceEnter values separated by commas or lines
Voltage Divider
LED Current-Limit Resistor
SI Prefix Converter
Convert between micro (µ), milli (m), kilo (k), and mega (M).
Optional: add a unit label like V, A, Ω, W, etc.
Base value
—
Factor (from → to)
—
Scientific
—
Human-friendly
—
Expand: see full table + extra prefixes
Quick reference across popular prefixes (n, µ, m, —, k, M, G).
Temperature Converter
Web Component • Celsius, Fahrenheit, Kelvin • Swappable units • Copy result • Locale-aware formatting
Default (C → F)
Kelvin mode (F → K)
Usage
Paste the custom element anywhere after the script below. Attributes:
default-from:C|F|Kdefault-to:C|F|Kdefault-decimals: 0–10locale(optional): e.g.en-CA,fr-FRtrailing-zeros(boolean): fixed decimals when present
<temperature-converter default-from="C" default-to="F" default-decimals="2"></temperature-converter>