Calculator disclaimer

Do not purchase, build, borrow, or make a tax decision solely from a calculator result.

Construction and materials

Field conditions, moisture, access, substrate, product dimensions, pattern, breakage, supplier minimums, code, permits, engineering, demolition, disposal, and contractor scope can materially change quantities and cost.

Utilities and digging

Contact the appropriate utility-location service and follow local digging, backflow, electrical, and permit requirements before excavation or installation.

Solar, EV charging, and energy

Solar and EV charging results are screening estimates. They do not model every tariff, shade condition, incentive, tax rule, station price, membership, charging curve, demand charge, fee rule, financing charge, replacement cost, or utility interconnection term.

HELOC and finance

Finance calculations use entered rates and simplified payment assumptions. Actual daily interest, variable-rate indices, margins, floors, caps, fees, draw behavior, lender rules, and tax treatment may differ.

Professional verification

Use qualified professionals where the project involves structure, electrical work, gas, plumbing, environmental hazards, property boundaries, regulated work, tax, or credit.