Electrician’s Handy Calculators

Practical tools for 1ϕ/3ϕ work. Estimates only—verify with NEC, local code, and nameplate data.

Ohm’s Law & Power Solver

Enter any two values and click “Solve”.
V = I×R, P = V×I = I²R = V²/R. Use consistent units.

Load → Current & Breaker (1ϕ / 3ϕ)

Enter load details and calculate.
Continuous loads often at 125% (NEC 210.20(A), 215.3). Confirm with current NEC/local amendments & nameplate data.

Voltage Drop Estimator

Select material & size, enter current and distance.
Targets: ≤3% branch, ≤5% total feeder+branch (design). Conditions vary with temp, reactance, conduit fill, etc.

⚠️ Disclaimer: Quick estimates only. Not a substitute for stamped engineering or compliance review. Verify with NEC/local code and manufacturer data.

Assistance Hours :

8 AM - 5 PM : Monday – Friday

CLOSED: Saturday & Sunday

Houston, TX (Serving Greater Houston)

© Copyright 2025. Claros Electric. All Rights Reserved.