Conversion tool map
Energy & power
Energy, power, force, electricity, and fuel measures.
Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.
Currency Converter Calculator
Convert indicative amounts among USD, EUR, GBP, JPY, CHF, and CAD using the calculator's fixed sample exchange factors, with clear guidance on rates, fees, and related money tools.
dBm to Watts Calculator
Convert dBm to watts and milliwatts with the logarithmic decibel-milliwatt formulas used in RF, wireless, electronics, and signal-power work.
Electric Current Converter
Convert electric current between amperes, milliamperes, and microamperes with SI-based factors, electronics examples, reference tables, and practical circuit cautions.
Energy Converter
Convert energy among joules, small calories, kilowatt-hours, and International Table BTU with specified unit conventions.
Joules to Volts Calculator
Calculate volts from joules and coulombs using voltage equals energy per unit charge, with required charge input.
Power Converter
Convert power among watts, kilowatts, mechanical horsepower, and megawatts with dimensional factors and clear rounding.
RMS to Watts Converter
Calculate watts from RMS voltage or RMS current when load resistance or impedance is known, with clear AC power assumptions.
Torque to Mechanical Horsepower Calculator
Calculate mechanical horsepower from torque and RPM using the exact ft·lbf and N·m constants in the calculator, with engine examples and RPM cautions.
Unix Time Converter
Convert Unix epoch timestamps in seconds to UTC dates and convert UTC date text back to Unix time for logs, APIs, databases, and scripts.
Watts to Mechanical Horsepower Calculator
Convert watts to mechanical horsepower using 745.69987158227022 W per mechanical hp, worked examples, motor-rating context, and accuracy notes.