Engineering Notation Converter

About this calculator

Engineering notation writes a number as a value between 1 and 1000 times 10 raised to a power that is always a multiple of three (…10⁻⁶, 10⁻³, 10⁰, 10³, 10⁶, 10⁹…) — unlike scientific notation, where the exponent can be any integer. Restricting exponents to multiples of three means every value lines up directly with an SI prefix: 10³ = kilo, 10⁶ = mega, 10⁻³ = milli, 10⁻⁶ = micro, and so on.

Electrical and electronics engineers rely on this format constantly because component values and instrument readouts are labeled in those same SI-prefixed units — a resistor marked "4.7 kΩ" or a capacitor marked "100 nF" is engineering notation in action — and students and technicians use this converter to translate a raw calculator result into the prefix form that matches a datasheet or multimeter display.