# Orders of magnitude (voltage)

To help compare different orders of magnitude, the following list describes various voltage levels.
| SI prefix | Factor (volt) | Value | Item |
| Micro- | 10$^{−7}$ | 500 nV | Change in nerve cell potential caused by opening a single acetylcholine receptor channel |
| Micro- | 10$^{−6}$ | 2 μV | Noise in an EEG taken at the scalp |
| Milli- | 10$^{−5}$ | 10–100 μV | Peak-to-peak amplitude of an average EEG taken at the scalp |
| Milli- | 10$^{−5}$ | 15 μV | Minimum terrestrial digital-TV RF antenna signal (−85 dBm over 75 Ω) |
| Milli- | 10$^{−5}$ | 56 μV | Minimum terrestrial analog-TV RF antenna signal (35 dB[μV]) |
| Milli- | 10$^{−4}$ | 500–1000 μV | Miniature endplate potentials, spontaneous fluctuations in neuron potentials |
| Milli- | 10$^{−3}$ | 1–2 mV | Potential created at ambient temperatures from K Type Thermocouple |
| Centi- | 10$^{−2}$ | ~10–50 mV | Ripple voltage in the output of a good DC power supply |
| Centi- | 10$^{−2}$ | 75 mV | Nerve cell resting potential |
| Deci- | 10$^{−1}$ | 320 mV | Typical voltage reference level in consumer audio electronics (0.316 V rms) |
| Deci- | 10$^{−1}$ | ~500 mV | Typical MOSFET threshold voltage for modern processes |
| Deci- | 10$^{−1}$ | ~700 mV | Forward voltage drop of normal silicon diodes |
| Deci- | 10$^{−1}$ | 800–1000 mV | Typical positive supply voltage of a low voltage CMOS digital integrated circuit |
| Deci- | 10$^{−1}$ | 900 mV | Lemon battery cell (made with copper and zinc electrodes) |
| N/A | 10$^0$ | 0-3 V | Magnitudes of standard reduction potentials in chemistry |
| N/A | 10$^0$ | 1.5 V | Alkaline battery AAAA, AAA, AA, C or D battery |
| N/A | 10$^0$ | 3.3 V | One of the most common low voltage CMOS digital circuit supply voltages. |
| N/A | 10$^0$ | 5 V | USB power, used for example to charge a cell phone or a digital camera. Also one of the most common digital circuit supply voltages for both TTL and CMOS technologies. |
| N/A | 10$^0$ | 6 V | A common voltage for medium-size electric lanterns. A voltage for older electric systems of automobiles. |
| Deca- | 10$^1$ | 12 V | Typical car battery |
| Hecto- | 10$^2$ | 100–240 V | Domestic wall socket voltage |
| Hecto- | 10$^2$ | 600 V | Electric eel sends this voltage in an average attack |
| Hecto- | 10$^2$ | 630 V | London Underground railway tracks |
| Kilo- | 10$^3$ | 2450 V | Electric chair execution in Nebraska |
| Kilo- | 10$^3$ | 3–10 kV | Electric fence |
| Kilo- | 10$^3$ | 3 kV | Voltage required to generate every 1mm of electric arc |
| Kilo- | 10$^3$ | 3–35 kV | Accelerating voltage for a typical television cathode ray tube |
| Kilo- | 10$^3$ | 4160-34,500 V | Typical voltages in North America for distribution of power from distribution substations to end users |
| Kilo- | 10$^4$ | 15 kV | Train 15 kV AC railway electrification overhead lines, 16+2⁄3 Hz |
| Kilo- | 10$^4$ | 25 kV | European high-speed train overhead power lines |
| Kilo- | 10$^4$ | 33 kV | Maximum voltage allowed in an electricity distribution grid after 1919 in the UK until 1926 (still used for heavy industry and factory overhead cable distribution systems) |
| Kilo- | 10$^4$ | 69–230 kV | Range used in North American power high-voltage transmission substations |
| Kilo- | 10$^5$ | 345–800 kV | Range used in EHV power transmission systems |
| Kilo- | 10$^5$ | 800 kV | Lowest voltage used by ultra-high voltage (UHV) power transmission systems |
| Mega- | 10$^6$ | 3 MV | Used by the ultra-high voltage electron microscope at Osaka University |
| Mega- | 10$^7$ | 25.5 MV | The largest man-made DC voltage – produced in a Van de Graaff generator at Oak Ridge National Laboratory |
| Mega- | 10$^8$ | 100 MV | The potential difference between the ends of a typical lightning bolt |
| Peta- | 10$^{15}$ | 7 PV | Voltage around a particular energetic highly magnetized rotating neutron star |
| Ronna- | 10$^{27}$ | 1.04 RV | Planck voltage |

## SI multiple

SI multiples of volt (V) :
| Submultiples | Submultiples | Submultiples | Multiples | Multiples | Multiples |
| Value | SI symbol | Name | Value | SI symbol | Name |
| 10$^{−1}$ V | dV | decivolt | 10$^1$ V | daV | decavolt |
| 10$^{−2}$ V | cV | centivolt | 10$^2$ V | hV | hectovolt |
| 10$^{−3}$ V | mV | millivolt | 10$^3$ V | kV | kilovolt |
| 10$^{−6}$ V | μV | microvolt | 10$^6$ V | MV | megavolt |
| 10$^{−9}$ V | nV | nanovolt | 10$^9$ V | GV | gigavolt |
| 10$^{−12}$ V | pV | picovolt | 10$^{12}$ V | TV | teravolt |
| 10$^{−15}$ V | fV | femtovolt | 10$^{15}$ V | PV | petavolt |
| 10$^{−18}$ V | aV | attovolt | 10$^{18}$ V | EV | exavolt |
| 10$^{−21}$ V | zV | zeptovolt | 10$^{21}$ V | ZV | zettavolt |
| 10$^{−24}$ V | yV | yoctovolt | 10$^{24}$ V | YV | yottavolt |
| 10$^{−27}$ V | rV | rontovolt | 10$^{27}$ V | RV | ronnavolt |
| 10$^{−30}$ V | qV | quectovolt | 10$^{30}$ V | QV | quettavolt |