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Voltage Drop Calculator
CalculatorEstimate device voltage and cable loss for two-wire DC or single-phase AC circuits using copper size or manufacturer resistance.
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BMS Unit Converter
Convert common BMS units for flow, temperature, volume, pressure, dimensions, velocity, power, energy, and torque.
Quick start
Choose a quantity, From unit and To unit, enter a value, then select Calculate. Choose Temperature difference for a temperature change rather than an absolute reading. Swap direction retains the converted quantity.
Inputs
Result
Enable JavaScript to calculate.
Method & assumptions
Target value = (source value × source factor + source offset − target offset) / target factor
Choose a quantity and compatible units. Temperature readings include offsets; temperature differences do not. Changing quantity clears the old value. Swap direction uses the unrounded converted result to preserve the physical quantity.
Reference: NIST · SI conversion factors · Methods, conversion conventions, and source notes
Worked example
1 L/s = 2.11888 CFM. A temperature of 20°C = 68°F; a temperature difference of 20°C = 36°F.
Frequently asked questions
Which quantities are supported?
Volumetric flow, temperature, temperature difference, volume, pressure, length, area, air velocity, power / heat rate, energy, and torque.
Recommended parts
Product recommendations have not been added. Calculated values are not product endorsements.
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