7 TOOLS // RUNS IN YOUR BROWSER
Engineering Calculators
At the desk, on site or at the soldering bench: enter the values and get the result instantly. Every tool shows its formula, can be shared by link and remembers your inputs. Nothing is sent to a server.
- Ohm & Power Enter any two of voltage, current, resistance and power and get the rest instantly. The live circuit drawing speeds up with the current. Open
- Voltage Drop Find the percentage voltage drop of copper or aluminium cable on a 230 V single-phase or 400 V three-phase line, and the recommended standard cross-section. Open
- LED Resistor Work out the required resistor, the nearest E12 value and its power rating from supply voltage, LED forward voltage and current. Open
- Color Code Two-way calculator for 4- and 5-band resistors: click the bands, or type a value and watch the resistor repaint. Open
- PF Correction Find the capacitor size (kVAr) and current saving needed from active power and existing and target cosφ. Open
- Unit Converter Convert instantly between kW, HP, kVA; mm² and AWG; °C and °F; dBm and mW. Open
- Current Capacity Look up approximate current capacity from a cross-section, or the minimum cross-section for a current. A simple, informational table picker. Open
For information only; in design work the responsible engineer and the applicable regulations prevail.