Engineering Notation and SI Prefix Converter
Convert values between decimal, scientific notation, engineering notation, and common SI-prefix scales such as n, µ, m, k, M, and G.
Input value
Enter a plain number, scientific notation, or an electronics-style prefixed value.
Use the prefix selector when the input field is a bare number with a separate unit prefix. Leave it at base when typing values like 4k7, 100n, or 1e-6 directly.
Converted forms
Engineering notation keeps exponents in multiples of three, so values line up with SI prefixes such as n, µ, m, k, M, and G.
Common SI-prefix views
Readable electronics values without decimal-place mistakes
Engineering notation keeps exponents aligned with SI prefixes, so component values and calculated results are easier to scan in schematics, datasheets, BOM notes, and simulation results.
Component values
Convert values such as 0.00000047 F into 470 nF-style notation before entering capacitor, filter, and timing calculators.
Datasheet units
Move between scientific notation, engineering notation, and SI-prefix units when copying values from datasheets or simulation tools.
Review checks
Quickly spot whether a result belongs in pico, nano, micro, milli, kilo, mega, or giga scale before carrying it into another calculation.
Equation, assumptions, and limits
Engineering notation represents numbers using powers of ten that are multiples of three. Those exponents map directly to common SI prefixes such as n, µ, m, k, M, and G.
Scale transform
The base value is scaled by the selected prefix, then reformatted into scientific, engineering, and prefix views.
Formatting only
The calculator does not add measurement tolerance or uncertainty; it only changes the representation of the entered value.
Prefix conventions
Both u and µ are accepted as micro-style inputs where engineering notation parsing is supported.
Related calculators and next checks
Engineering conversion calculator
Continue into temperature, dB, dBm, RMS, dimensions, angles, and complex-value conversions.
Ohm's law calculator
Use parsed engineering values directly in voltage, current, resistance, and power checks.
Engineering utility calculators
Browse notation, conversion, reference, and unit-prep tools.
Engineering reference
Equations, assumptions, and design guidance
Reformats a finite value into decimal, scientific, engineering, and SI-prefix notation without changing its magnitude.
Equations and variables
m = x / 10^n, where n is a multiple of 3- x
- Base-unit value (base unit)
- m
- Engineering mantissa (selected SI scale)
- n
- Engineering exponent (dimensionless)
Assumptions and limitations
Assumptions
- The input is a finite numeric value.
- An explicitly selected input prefix scales a bare input before formatting.
Limitations
- Displayed values are rounded to the selected significant-figure count.
- The SI-prefix table covers femto through tera.
Worked example and design use
One micro in engineering notation
Inputs: x = 0.000001, significant figures = 4
Outputs: Engineering notation = 1e-6, Best SI-prefix view = 1 micro
Design guidance
- Keep the base unit explicit when transferring a prefixed value into another calculation.