Engineering Scientific Calculator Online

Advanced engineering scientific calculator with trigonometry, logarithms, physical constants (Copper, Gravity, Light), Binary/Hex converter and SI prefixes.

Scientific Functions, Engineering Notation & Physical Constants

IEEE 754 Double-Precision Standard: Includes automatic engineering notation (exponents in multiples of 3) and direct insertion of physical and electrotechnical constants.

Identidad Fundamental: sin²(θ) + cos²(θ) = 1 | Cambio de Base Logarítmica: log_b(x) = ln(x) / ln(b)

International System (SI) Prefixes & Fundamental Constants

Símbolo / Constante	Nombre Técnico	Valor Exacto	Unidad SI
ρ (Cu 20°C)	Resistividad del Cobre Electrolítico	0,017241	Ω·mm²/m
g	Aceleración de la Gravedad Estándar	9,80665	m/s²
c	Velocidad de la Luz en el Vacío	299.792.458	m/s
G / M / k	Prefijos Giga / Mega / Kilo	10⁹ / 10⁶ / 10³	Factor
m / μ / n / p	Prefijos Mili / Micro / Nano / Pico	10⁻³ / 10⁻⁶ / 10⁻⁹ / 10⁻¹²	Factor

Frequently Asked Technical Questions (FAQ)

How do you calculate wire size for voltage drop?

For DC and single-phase AC circuits, cross-sectional area S (mm²) = (2 × Length × Current × ρ) / Voltage Drop (V). Always verify that conductor ampacity meets NFPA 70 (NEC Table 310.16) or IEC 60364.

What is the maximum allowable voltage drop?

Under NEC and IEC standards, the recommended maximum voltage drop is 3% for branch circuits and 5% total for combined feeder and branch circuits.