🔢 Number Scale Converter
Convert between SI magnitude prefixes — pico, nano, micro, milli, kilo, mega, giga, tera, and peta. Essential for scientific and engineering work.
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Common Number Scale Conversions
| Input | Unit | Result | Unit |
|---|---|---|---|
| 1 | Giga (×10⁹) | 1000 | Mega (×10⁶) |
| 1 | Mega (×10⁶) | 1000 | Kilo (×10³) |
| 5 | Nano (×10⁻⁹) | 0.005 | Micro (×10⁻⁶) |
| 1 | Tera (×10¹²) | 1000 | Giga (×10⁹) |
| 500 | Micro (×10⁻⁶) | 0.5 | Milli (×10⁻³) |
| 1 | Peta (×10¹⁵) | 1000 | Tera (×10¹²) |
Formula Reference
SI prefix table: pico (p) = ×10⁻¹² nano (n) = ×10⁻⁹ micro (μ) = ×10⁻⁶ milli (m) = ×10⁻³ base = ×10⁰ kilo (k) = ×10³ mega (M) = ×10⁶ giga (G) = ×10⁹ tera (T) = ×10¹² peta (P) = ×10¹⁵
About Number Scale Conversions
SI (Système International) prefixes extend any base unit across an enormous range of scales using powers of ten. Whether you are working with nanometers in semiconductor design, microseconds in network latency, megabytes in file sizes, or gigahertz in processor speeds, these prefixes provide a consistent shorthand. This converter lets you shift between any two prefix scales directly — for example, converting 5 gigawatts to megawatts (5,000) or 350 nanometers to micrometers (0.35).
The prefixes below milli (10⁻³) — micro, nano, pico — are essential in modern electronics, biology, and medicine. A human red blood cell is about 7 micrometers wide. Modern transistors in integrated circuits are measured in nanometers (current leading-edge chips use 3 nm or 4 nm process nodes). X-ray wavelengths fall in the angstrom range (0.1 nm). Pico-scale measurements appear in capacitance (picofarads) and precision timing (picoseconds).
Above kilo (10³), mega, giga, tera, and peta are the everyday scale of computing and data. A typical hard drive is measured in terabytes. Global internet traffic is measured in exabytes per month (10¹⁸ bytes). Scientific datasets from telescopes and particle physics experiments reach petabytes. As technology scales, familiarity with these prefixes becomes increasingly practical — not just for scientists and engineers, but for anyone working with modern data.
Frequently Asked Questions
How many nano are in a micro?
There are 1,000 nano units in one micro unit (since micro = 10⁻⁶ and nano = 10⁻⁹, the ratio is 10³ = 1,000). For example, 1 microsecond = 1,000 nanoseconds, and 1 micrometer = 1,000 nanometers.
What does 'giga' mean?
Giga means 10⁹ (one billion). It comes from the Greek word 'gigas' meaning giant. One gigahertz = 1,000,000,000 Hz; one gigabyte = 1,000,000,000 bytes (decimal). In everyday computing, GHz is used for processor clock speeds and GHz/MHz for radio frequencies.
What is the difference between milli and micro?
Milli (m) = 10⁻³ (one thousandth). Micro (μ) = 10⁻⁶ (one millionth). Micro is 1,000 times smaller than milli. For example, 1 millimeter = 1,000 micrometers; 1 millisecond = 1,000 microseconds; 1 milliamp = 1,000 microamps.
What is tera used for?
Tera (T) = 10¹² (one trillion). It is most commonly encountered in data storage (terabytes), where a 1 TB hard drive holds one trillion bytes. In physics, terahertz (THz) radiation sits between infrared and microwave frequencies. Network backbone links are rated in terabits per second (Tbps) at internet exchange points.
What comes after peta?
After peta (10¹⁵) come exa (10¹⁸), zetta (10²¹), and yotta (10²⁴). These are becoming relevant in data science: global internet traffic is now measured in exabytes per month. The SI system also includes quetta (10³⁰) and ronna (10²⁷), added in 2022, though these are currently only needed in cosmology and particle physics.
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All conversion results are provided for general informational purposes only. Our formulas use internationally recognized conversion factors; however, rounding may affect precision. Do not rely on these results for professional, medical, legal, or engineering decisions without independent verification. Read our full disclaimer.