Utilities · 2026Privacy-first · runs in your browser

Free browser tools

Same ContractorHQ quality bar as the rest of the site: quick pages, clear outcomes, no paywall for the basics. Each tool lives on its own URL so you can bookmark or share it.

Privacy: these utilities are built to do their job in the browser. We do not send your inputs to an AI API to get an answer — so your numbers and text stay on your device unless a specific tool says otherwise.

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Roofing bundle calculator

Squares, waste and bundles per shingle spec — order-of-magnitude for crews and quotes.

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HVAC duct sizing estimator

CFM and face velocity to a round duct size sketch — teaching aid, not Manual J.

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Labor burden & bill rate

Loaded tech cost and a bill rate that hits your margin on labor — local math, not payroll software.

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Good / better / best proposals

Three tiers, prices and bullets to markdown for tablet walkthroughs.

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Mulch & gravel volume

Length × width × depth to cubic yards or m³ — for beds, stone and bulk orders.

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Voltage drop calculator

AWG, amps, one-way feet and volts — rough I×R drop for field chats, not NEC stamps.

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Hot water wait calculator

Pipe size, length and fixture GPM — cold slug gallons and seconds to purge.

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Tile & flooring waste

Net area plus pattern waste presets and optional cushion — order square feet.

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Dumpster volume estimator

Count bulky items → cubic feet and a roll-off size talk track for junk jobs.

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Service job breakeven

Material, labor, trip and margin — minimum ticket price for one job snapshot.

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Markup vs margin visual

Stacked bar: how much of the sell dollar is still cost vs profit at your markup.

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Paint coverage calculator

Room shell, opening deduct and coverage per gallon — gallons for one coat.

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Seasonal cash flow planner

Peak vs slow months and fixed overhead — crude annual cash gap whiteboard.

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Construction waste factors

Lumber, drywall or trim with pro vs beginner waste — order quantity multiplier.

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Permit time estimator

U.S. heuristic week ranges by common residential scope — not live AHJ data.

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Software cost calculator

Team size, trade and features in — Jobber, Housecall Pro and ServiceTitan pricing out, with a clear pick.

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Character & word counter

Live counts for characters, words and lines — full width on your phone, nothing uploaded.

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Markup calculator

Cost plus markup to sell price, profit and margin on price — thumb-friendly inputs.

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JSON formatter

Validate and pretty-print JSON — stacked editor on mobile, side by side on desktop.

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YouTube timestamp links

Build shareable watch URLs that jump to an exact minute and second.

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Working days calculator

Count Monday–Friday days between two dates — native pickers on iOS and Android.

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WhatsApp link & QR

wa.me links with optional message plus a QR you can screenshot — generated locally.

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Privacy text redactor

Mask emails and phone-like patterns before pasting drafts into other tools.

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Unit converter

Length, weight and temperature from one base number — offline after load.

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Tip calculator

Bill, presets, slider and even split — thumb-friendly on phones.

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Percentage calculator

Percent of, part-to-whole, and percent change — three modes, two fields.

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URL slug generator

Headlines to clean hyphen slugs for URLs and files — ASCII folding.

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Social snippet splitter

Long post to short blocks with soft breaks — X, Bluesky or long-form presets.

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Meeting notes to tasks

Pull bullets, checkboxes and Action:/Todo: lines into a numbered list.

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Browser micro-benchmark

Tiny JS loop timings — median of several runs, curiosity not a lab score.

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Sales tax calculator

Forward or reverse math with your own combined rate — not filing advice.

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HTML accessibility checker

Paste markup — quick alt, label and vague-link heuristics before a real audit.

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Product description builder

Trade-focused paragraph template from fields — edit before you publish.

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URL safety checker

Parse links for protocol, host and simple red flags — no remote malware scan.

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Code metrics analyzer

Lines, TODO/FIXME and console.log counts on pasted source — regex level.

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Ad spend loss estimator

What-if wasted spend from assumed invalid clicks and a blended CPC.

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Currency converter demo

Static USD-bridged rates for six currencies — demo only, not live FX.

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Transcript to social chunks

Blank-line paragraphs to social-sized chunks — no summarization.

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Trade email template builder

Estimate follow-up, schedule confirm, invoice sent — plain text copy out.

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cURL command parser

Extract method, URL and -H headers from docs examples — never executes.

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Looking for the full software directory (Jobber, ServiceTitan, etc.)? All contractor software tools

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