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
Drop-in Web Component • Celsius, Fahrenheit, Kelvin • Swappable units • Copy result • Locale-aware formatting
Default (C → F)
Kelvin mode (F → K)
Usage
Paste the tag 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>