Estimating software that understands the electrical system.
VoltDrop is not an estimating system and does not replace one. It is the layer that prepares the electrical job before pricing.
Where estimates actually go wrong
Estimating errors are rarely arithmetic errors. They are scope errors: a disconnect that both divisions assumed the other was furnishing, a feeder that was revised in an addendum after the one-line was drawn, a panel schedule that lists circuits the power plan never tags.
By the time those show up, they are change orders, RFIs, or margin. The math was fine. The understanding of the job was not.
Scope assumed, not confirmed
Responsibility for equipment disconnects, controls wiring, and equipment connections often sits in the gap between Division 26 and the mechanical drawings.
Revisions applied unevenly
An addendum changes a breaker; the one-line is not reissued. Both documents are now in the set and they disagree.
Quantities without provenance
A number in a takeoff that nobody can trace back to a sheet is a number nobody can defend in a scope review.
Feeders priced from a symbol
A feeder tag on a one-line is not a length, a raceway, or a pull. Someone still has to decide what it takes to install.
What VoltDrop does before the estimate
VoltDrop sits upstream of pricing. It reads the contract set — drawings, specifications, schedules, addenda, and the mechanical and architectural information that bears on electrical scope — and produces a structured account of what the electrical job actually contains.
That structure is what goes into your estimating system. The pricing stays where it is; what changes is the confidence in what you are pricing.
- Electrical obligations pulled from across the set, not one sheet at a time
- Quantities linked to the drawing or specification section they came from
- Feeders and homeruns as structured runs with source, destination, and length
- Conflicts and missing information flagged rather than silently assumed
- Voltage drop, conductor sizing, and conduit fill verified by deterministic engines
Deterministic math, not generated numbers
Critical electrical calculations run through calculation engines with published methods and code references — not through a language model. Voltage drop uses NEC Chapter 9 Table 8 circular mils with temperature correction; ampacity comes from the 75°C column of NEC 310.16; conduit fill uses Chapter 9 Tables 1, 4, and 5.
AI is used where the work is genuinely reading and reconciling documents. It is not used to invent engineering results.
RELATED
- Electrical Takeoff SoftwareElectrical takeoff software that ties quantities back to the drawing and specification they came from. Devices, feeders, raceway, and conductors with traceable sources.
- Electrical Preconstruction SoftwareElectrical preconstruction software for contractors. Understand scope, system relationships, and project risk before the bid goes out.
- Electrical Feeder SizingFeeder sizing driven by deterministic electrical math — ampacity, voltage drop, conductor selection, and raceway, with every assumption visible and reviewable.
- Voltage Drop CalculatorFree voltage drop calculator for copper and aluminum conductors. Single and three phase, NEC Chapter 9 circular mils, temperature correction, ampacity check, and conductor recommendation.
Understand the job before you bid it.
VoltDrop is in early access with a limited cohort of electrical contractors. Join the Founding Contractor program and help shape what gets built next.