Electronics Unit Converter
Answer
Multiply by the prefix factor, then divide by the target prefix. 1 kΩ = 1000 Ω, 4.7 µF = 4.7×10⁻⁶ F, 20 mA = 0.02 A. The converter accepts common aliases (ohm, k, uF, mA) and keeps the quantity dimension consistent.
Calculator
How it works
Bench work mixes prefixes constantly: schematic values in kΩ and µF, SPICE in base SI, datasheets in mA and mAh. Converting in your head is fine until a decimal slips.
Enter a number, the unit string you have, and the unit you want. Optional dimension hint disambiguates rare aliases. The SI column shows the value in base units so you can sanity-check before dropping it into another tool on this site.
Parameters used on this page
| Parameter | Value | Source |
|---|---|---|
| SI scaling | value_SI = value × prefix_factor | IEC 80000 / SI brochure |
| Target unit | result = value_SI / target_prefix_factor | Same dimension only |
| Recognised dimensions | Ω, V, A, F, H, Hz, s, W, J | This site's electronics focus |
Worked example
A 4.7 kΩ bias resistor is 4700 Ω. A 100 nF decoupler is 0.1 µF or 100×10⁻⁹ F. A 2500 mAh cell at 50 mA average is the same as 2.5 Ah at 0.05 A when you move to SI.
Pitfalls
- Confusing m (milli, 10⁻³) with M (mega, 10⁶). Capacitor markings often use µF while spice netlists use F.
- Converting mA to µA by typo — always write the base unit in the result column before you paste into a schematic.
- Mixing dimensions (trying to convert volts to ohms). The tool only converts within one quantity.
FAQ
How do I convert kiloohms to ohms?
Multiply by 1000. 4.7 kΩ becomes 4700 Ω.
Does the converter accept micro symbol µ?
Yes, along with u as a common ASCII alias for micro.
Can I convert milliamps to amps?
Yes. Enter the value in mA, set from mA and to A, or use the current dimension hint.
What about farads and microfarads?
Use F as the base. 10 µF in the from field with unit µF converts cleanly to nF or F.
Related
Sources
- SI prefixes per BIPM / IEC 80000.