Science
Science and Engineering Calculators
Solve common physics and electrical engineering relationships. Every tool includes its formula, a worked example, limitations, FAQs, and references.
Density Calculator
Calculate density from mass and volume in SI units.
Ohm's Law Calculator
Solve voltage, current, or resistance by entering the other two.
Voltage Drop Calculator
Estimate DC two-conductor voltage drop from entered wire resistance.
Electrical Power Calculator
Calculate real electrical power from voltage, current, and power factor.
Energy Converter
Convert joules, kilojoules, kilowatt-hours, calories, and BTU.
Using these tools responsibly
Start with consistent units and realistic inputs. Treat estimates as planning aids and confirm decisions involving safety, regulation, tax, academic policy, or substantial cost with an authoritative source.