Free Trade Tools & Calculators
Professional-grade construction calculators designed for skilled trades pros, students, and DIYers. All tools run 100% in your browser—no downloads, no installs, no tracking.
Plan a conduit bend, compute voltage drop, generate a pipe template, optimize a cut list, or estimate a bid. Each tool includes visual layouts, shareable links, and job-friendly outputs.
Tool Categories
Electrical Tools
Essential electrical calculators for planning installations, sizing conductors, estimating costs, and staying code-aware.
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Voltage Drop Calculator + Payback Planner
Calculate voltage drop for single-phase and three-phase circuits. Includes power factor, AWG/mm² sizing, copper/aluminum comparison, temperature adjustment, and a payback estimator for upsizing conductors. Estimate kWh line loss and annual energy costs. Also known as a voltage drop calculator with energy cost analysis.
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Conduit Bending Planner
Plan two-bend offsets, three-bend saddles, four-bend saddles, 90° stubs, and back-to-back 90s. Get mark spacing, multipliers, shrink, take-up, and springback adjustments. Includes visual layout, phone tilt readout, and PNG/SVG export. Conduit bending calculator functionality included.
Mechanical & Plumbing Tools
Tools for pipefitters, plumbers, HVAC techs, and welders. Generate templates, plan layouts, and ensure accurate fitment.
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Pipe Miter & Fishmouth Template Generator
Generate full-scale printable templates for pipe miters, fishmouths, and coping joints. Enter pipe diameters and angles, print at 100% scale, wrap around the pipe, and cut. Ideal for welding and pipe fitting. Pipe template generator for miters and coping.
Rigging & Safety Tools
Calculate loads, angles, and safety factors for rigging operations. Ensure safe lifts and sound planning.
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Rigging Sling Angle & Load Calculator
Interactive rigging calculator with visual sling-angle planner. Drag pick points, set hitch type, see per-leg tension, load share, and D/d ratio. Export a PNG lift plan for job documentation. Includes safety notes and angle limits. Rigging calculator for sling tension and load share.
General Construction Tools
Practical tools for estimating, planning, and optimizing material usage across all trades.
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Cut-List Optimizer (Kerf-Aware)
Optimize material cutting to minimize waste. Enter stock lengths and required cuts, set kerf width, and get an efficient cutting plan. Shows waste per stock piece, total waste, and visual cut layout. Ideal for lumber, pipe, conduit, or any linear material. Cut list calculator with kerf.
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Job Bid Estimator
Estimate job bids with detailed cost breakdowns. Enter labor hours, hourly rates, material costs, overhead percentage, and profit margin. Get itemized totals, subtotals, and final bid amount. Export or print estimates for clients.
Why Use These Tools?
These calculators and planners are designed with real-world trades work in mind:
- Privacy-first: All calculations run in your browser. No data is sent to any server.
- Shareable: Most tools generate shareable URLs so you can send your work to coworkers or save for later.
- Visual: Interactive diagrams, drag-and-drop interfaces, and exportable images.
- Mobile-friendly: Use them on the job site with your phone or tablet.
- Free: No subscriptions, no ads, no sign-ups. Just tools that work.
Looking for Training?
If you're using these tools to learn a trade or prepare for a career, check out our directory of trade schools and vocational programs near you. From electrician training to welding certification, we can help you find the right program.
Already working in the trades? Share these tools with apprentices, coworkers, or students. Bookmark this page for quick access to all the calculators.