Engineering Calculator
A free scientific calculator for engineering students and everyday calculations.
Scientific Calculator
Examples: sin(30), sqrt(144),
log(100), 2^8, 5!.
Use explicit multiplication, such as 2*pi.
Common Engineering Formulas
Ohm's Law
Voltage: V = I × R
V = voltage, I = current, R = resistance
V = voltage, I = current, R = resistance
Electrical Power
P = V × I
P = power, V = voltage, I = current
P = power, V = voltage, I = current
Density
ρ = m / V
Mass divided by volume
Mass divided by volume
Velocity
v = distance / time
For average speed along a path
For average speed along a path
Mechanical Stress
σ = F / A
Force divided by cross-sectional area
Force divided by cross-sectional area
Mechanical Strain
ε = ΔL / L
Change in length divided by original length
Change in length divided by original length
Rectangle Area
A = length × width
Circle Area
A = πr²
r = radius
r = radius
Check units and applicable assumptions before using a formula in an engineering design.