
Voltbook: Electric Circuit
NEC tables for electricians
0 ratings
Free
In-App Purchases
About
Voltbook is a voltage drop calculator and circuit calculator that puts trustworthy electrical answers in your pocket, right where the work happens. Every result shows the formula and the assumptions behind it, so you can check the math instead of guessing.
Alongside the calculators, Voltbook bundles an NEC code book of reference tables for electricians so a code-edition-aware reference is always one tap away, whether you're sizing conductors or checking box fill.
- Voltage drop, ampacity, conduit fill, box fill, and breaker sizing in seconds
- NEC reference tables that follow the code edition you pick, so answers match your inspector
- Share or export any result with the formula, inputs, and edition stamped on it
- Works fully offline, in the basement or on the roof
Voltbook is a calculation aid for licensed professionals. Always verify results against the current adopted code in your area.
Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Show more
What's New in Voltbook
1.0
August 5, 2026
1
In-App Purchases
$9.99
Voltbook Lifetime
Unlock the export layer — formula-stamped PDF




