Engineering Formula & Sizing Suite
Precision electrical, civil, mechanical, fluid dynamics, and thermodynamics calculators for practicing engineers, field technicians, and engineering students.
Calculate electrical current (Amps) and electrical power dissipation (Watts) from Voltage & Resistance.
Calculates total voltage drop across one-way copper circuit distance and percentage loss (NEC ≤ 3% benchmark).
Decode 4-band through-hole resistor values with multiplier and tolerance rating.
Shaft power and mechanical output calculation from rotational speed and torque in kW and HP.
Speed reduction or overdrive calculation based on tooth count of driver and driven gears.
Push (extension) and pull (retraction) tonnage force based on bore diameter and hydraulic pressure.
Calculate slab cubic meters (m³) and standard 50 kg cement bags required (Nominal M20 1:1.5:3 mix).
Calculates maximum deflection (δ = P·L³ / 48·E·I) of a simply supported beam with a center point load.
Predicts flow regime inside pipes (Laminar Re < 2300, Transitional, or Turbulent Re > 4000).
Fourier's Law of Heat Conduction (Q = k · A · ΔT / d) for planar walls, building insulation, and heat exchangers.
Compressed air requirement for reciprocating cylinders to properly size factory air compressors.