工学

標準的な物理定数を用い、各ページに出典を明記した電気・機械工学の計算ツールです。

Solve Ohm's law for voltage, current, resistance or power. Enter any two known values and get all four quantities with the formulas V=IR and P=VI.

Calculate voltage drop for copper or aluminum conductors in DC, single-phase or three-phase circuits from length, current and cross-section in mm².

Convert power between watts, kilowatts, megawatts, mechanical horsepower, metric horsepower (PS) and BTU/h. 1 hp = 745.7 W; 1 PS = 735.5 W.

機械

Convert pressure between bar, psi, kPa, atm and mmHg using standard definitions: 1 atm = 101,325 Pa, 1 bar = 100,000 Pa, 1 psi = 6,894.757 Pa.

Convert force between newtons, kilonewtons, pounds-force and kilograms-force. Standard factors: 1 lbf = 4.4482216 N, 1 kgf = 9.80665 N.

Calculate torque from power and RPM with T = 9549.3 × kW ÷ rpm, or convert torque between N·m, lb·ft and kgf·m using standard factors.