Coulombs to mC Converter
Convert Electric Charge Between Coulombs (C) and Millicoulombs (mC) with SI-Accurate Math
📊 Common Coulomb ⇄ Millicoulomb Values
| Coulombs (C) | Millicoulombs (mC) |
|---|---|
| 0.001 | 1 |
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 50 | 50,000 |
| 100 | 100,000 |
📚 Coulombs, Millicoulombs and the SI Prefix “Milli”
What Does the Milli Prefix Mean?
In the SI system, the milli prefix (symbol m) denotes a factor of \( 10^{-3} \). That is, \( 1\ \text{mC} = 10^{-3}\ \text{C} = 0.001\ \text{C} \), exactly as standard metric-prefix tables state for milli applied to any base unit.[web:177][web:180]
Rewriting this relationship gives the key conversion for this calculator. If \( 1\ \text{mC} = 10^{-3}\ \text{C} \), then \( 1\ \text{C} = 10^{3}\ \text{mC} = 1{,}000\ \text{mC} \), which matches all SI-consistent charge-conversion tables and online C↔mC tools.[web:174][web:175]
Coulombs to Millicoulombs Formula
The general formula from coulombs to millicoulombs is \( \text{mC} = \text{C} \times 1{,}000 \). For example, 0.1 C becomes \( 0.1 \times 1{,}000 = 100\ \text{mC} \), and 2 C becomes \( 2 \times 1{,}000 = 2{,}000\ \text{mC} \), exactly as shown in reference conversion tables.[web:171][web:175]
This follows directly from the milli factor \( 10^{-3} \). Starting from \( 1\ \text{mC} = 10^{-3}\ \text{C} \), divide both sides by \( 10^{-3} \) to obtain \( 1\ \text{C} = 10^{3}\ \text{mC} \), so any charge \( Q \) in coulombs maps to \( Q \times 10^{3} \) millicoulombs.[web:177][web:189]
Millicoulombs Back to Coulombs
The inverse formula from millicoulombs to coulombs is \( \text{C} = \frac{\text{mC}}{1{,}000} \). So 1,000 mC corresponds to \( \frac{1{,}000}{1{,}000} = 1\ \text{C} \), 250 mC gives \( 250 ÷ 1{,}000 = 0.25\ \text{C} \), and 10 mC gives \( 10 ÷ 1{,}000 = 0.01\ \text{C} \).[web:174][web:185]
This division-by-1,000 pattern is what instrument manuals typically quote. Electric-charge calculators and unit-conversion tables summarise it as “1 C = 1,000 mC” and “1 mC = 0.001 C”, covering both directions in a compact rule.[web:171][web:175]
❓ Coulomb to mC FAQs
The exact factor is \( 1\ \text{C} = 1{,}000\ \text{mC} \). Since milli means \( 10^{-3} \), \( 1\ \text{mC} = 10^{-3}\ \text{C} \) and therefore \( 1\ \text{C} = \frac{1}{10^{-3}} = 10^{3} = 1{,}000\ \text{mC} \).[web:177][web:180]
Conversion tables for electric charge all use this same relationship. For instance, they list 0.01 C = 10 mC, 0.1 C = 100 mC, and 1 C = 1,000 mC, confirming the factor of 1,000 between the two units.[web:172][web:175]
Divide by 1,000 to go from mC to C. The formula \( \text{C} = \frac{\text{mC}}{1{,}000} \) means 500 mC becomes 0.5 C and 10 mC becomes 0.01 C, which aligns with standard unit-conversion examples.[web:174][web:185]
Conceptually, you are removing the milli factor of \( 10^{-3} \). Writing 10 mC as \( 10 \times 10^{-3}\ \text{C} \) gives \( 10^{-2}\ \text{C} = 0.01\ \text{C} \), the same numeric result as dividing by 1,000.[web:177][web:183]
Many real-world charges are smaller than 1 C but larger than microcoulombs. In circuit experiments, capacitor discharge, and classroom physics problems, values in the 1–10,000 mC range are common, so mC keeps numbers compact and easy to interpret.[web:174][web:176]
Using mC avoids long decimals while staying close to the SI base unit. Instead of writing 0.002 C, engineers and students can work with 2 mC, which is numerically cleaner yet still tied directly to coulombs through a simple factor of 1,000.[web:171][web:190]
