About the Capacitance Converter
The Capacitance Converter converts electrical capacitance values between picofarads, nanofarads, microfarads, millifarads and farads, the units used across capacitor datasheets, circuit schematics and multimeter readings. It's built for anyone reading a capacitor's printed value in one unit and needing it expressed in another for a parts list or circuit calculation.
How It Works
Enter a capacitance value and choose the unit to convert from and the unit to convert to. The calculator converts the value into farads as an intermediate base unit, then converts that into the target unit, and also shows a reference table for 1, 5, 10, 25, 50 and 100 units converted the same way.
Formula & Methodology
Every unit is defined by how many farads it equals, so converting between any two capacitance units is a two-step process: multiply the input by its unit's factor to get an equivalent value in farads, then divide that farad value by the target unit's factor. Converting microfarads to nanofarads, for example, multiplies by 0.000001 to reach farads, then divides by 0.000000001, which works out to multiplying the original value by 1,000.
Examples
10 uF to nF
Converting 10 microfarads to nanofarads gives 10,000 nF, since microfarads are 1,000 times larger than nanofarads.
220 pF to uF
Converting 220 picofarads to microfarads gives 0.00022 uF, illustrating how small typical ceramic capacitor values look once expressed in microfarads.
Advantages
- Handles all five common capacitance units used on datasheets and capacitor markings in a single tool, from picofarads up to farads.
- Shows a reference table of several values at once, useful for scanning a range of component options.
- Uses a consistent farad-based conversion method, avoiding errors that come from memorizing multiple pairwise conversion factors.
Common Mistakes
- Misreading a capacitor's printed value, such as confusing a three-digit code like 104 (which means 100 nF) with a direct picofarad or microfarad reading.
- Mixing up microfarads and millifarads, which look similar in abbreviation but differ by a factor of 1,000.
- Assuming capacitance unit prefixes scale the same way as other electrical units, when in fact this range spans an unusually wide span from picofarads to farads.
Edge Cases to Watch For
- Because farads are used as the intermediate step, very small values like picofarads pass through a very small intermediate number in farads, though the final displayed result is unaffected by this internal step.
- The main result is rounded to 6 decimal places, so converting a very large capacitance in the farad range down into picofarads can produce a number too large to show all its significant digits precisely.
- The calculator doesn't flag typical real-world capacitor ranges, so entering a value like 500 F, realistic only for a supercapacitor, will still convert correctly even though it isn't representative of a standard capacitor.
Common Use Cases
- Electronics hobbyists and students converting a capacitor's marked value into the unit used in a formula or datasheet.
- Engineers cross-referencing component specifications that use different unit conventions across manufacturers.
- Anyone replacing a capacitor in a repair who needs to match a printed rating expressed in an unfamiliar unit.