ELECTRICAL CALCULATION TOOLS
PowerCalc
Three quick calculators for common electrical work. Pick one below — each page updates results automatically as you type, shows the formula used, and lets you print or copy the result.
Ohm's Law
Find voltage, current, or resistance from any two known values. Useful for basic circuit sizing and troubleshooting.
V = I × R
Electrical Power
Solve for power, voltage, or current across DC, single-phase AC, or three-phase AC systems, with power factor support.
P = V × I × factor
Voltage Drop
Estimate cable voltage drop from cable length and current, using either a known cross-sectional area or a standard AWG size.
Vdrop = I × R
What each tool does
- Ohm's Law — enter any two of V, I, R; the third is calculated automatically
- Electrical Power — switch between DC, 1-phase, and 3-phase, then enter any two of P, V, I
- Voltage Drop — choose Cross-Section mode (enter mm² area) or Standard Size mode (pick an AWG size)
- Every calculator shows a step-by-step breakdown, and lets you copy the result or print it as a PDF