Calculators

Electronics

• Capacitive reactance online calculator & Python code
• Capacitor energy from capacitance and voltage online calculator & Python code
• dBµV to Volts online calculator & Python code
• FR4 PCB thermal expansion online calculator
• How long does a I²C message transmission take? Online calculator
• Incandescent bulb power calculator
• Inductive reactance online calculator & Python code
• Relay coil current calculator (from coil power and voltage)
• Resistor power dissipation calculator
• Resistor temperature coefficient calculator
• RTC battery lifetime online calculator
• Sense resistor power dissipation calculator
• Voltage divider output voltage calculator (from R1 & R2)
• Volts to dBµV online calculator & Python code

Physics

• Lumen to Candela online calculator & Python code

Mathematics

• Slope-intercept form from two points online calculator

Data science

• FFT spectrum frequency resolution calculator

Hardware

• Tube volume calculator

Compliance

• X1/X2/Y1/Y2/Y4 impulse withstand rating voltage calculator (IEC 60384-14)

Economics

• Lehman scale fee calculator

General

• Accessory cord tensile strength calculator (EN 564)
• Bilirubin mg/dl to μmol/l converter
• Centrifuge acceleration calculator (from rpm and diameter)
• Centrifuge diameter calculator (from acceleration & rpm)
• Cylinder volume calculator (from diameter & height)
• Grams-to-mol online converter
• Hollow cylinder volume calculator (from diameters & height)
• Hz to RPM converter
• Pressure in a rotating body of liquid calculator
• Relay lifetime online calculator
• RPM to Hz converter
• Sense resistor / current shunt + current sense amplifier calculator
• Sense resistor / current shunt calculator
• Simple body surface area calculator