The HandySuite field kit
Less searching.
Back to the job.
Free handyman calculators and technical cheat sheets for the moment you need an answer. Pick a tool, check the source, and keep the work moving.
GFCI requirement finder
Find common dwelling GFCI requirements by location, with 2023 and 2026 NEC context, code references, and a free mobile-friendly lookup.
Open free toolJoist span calculator
Check a floor joist span against a sourced table for No. 2 lumber at 16-inch centers, with species, size, and dead-load selection.
Open free toolWire gauge reference
Look up common copper wire gauges and general small-conductor overcurrent limits: 14 AWG / 15 A, 12 AWG / 20 A, and 10 AWG / 30 A.
Open free toolPipe slope & drain fall
Find minimum horizontal drain slope by pipe size under 2021 IPC Table 704.1, then calculate total fall in inches for your pipe run.
Open free toolTrane error codes
Look up selected Trane S9V2 furnace fault codes, including E2.1, E3.2, E04, and E05, with the exact manufacturer manual and model scope.
Open free toolA quick reference with the details attached.
Each tool names the code edition, table conditions, or equipment manual behind its answer. U.S. model codes apply only where adopted, and local amendments can differ. Check the page’s scope before using a result for a job.