# Free calculators for trades businesses

Free, no-signup calculators for contractors and home service businesses. Price a job, find your break-even, see what missed calls cost, estimate quarterly taxes, or work out materials for a roof, slab or paint job. Every tool shows its formula and a worked example.

## Material and job estimating

- [AC Tonnage Calculator](https://www.brix.so/tools/hvac-tonnage-calculator): Rough AC tonnage calculator using the square-feet-per-ton rule of thumb, with a Manual J reality check. Ballpark only; size systems with ACCA Manual J.
- [BTU Calculator](https://www.brix.so/tools/btu-calculator): Free BTU calculator built on the ENERGY STAR room AC sizing chart, with sun, occupant and kitchen adjustments. A rule of thumb, not a Manual J load calc.
- [Concrete Calculator](https://www.brix.so/tools/concrete-calculator): Free concrete calculator for slabs, footings and columns. Get cubic yards for ready-mix and 40, 60 or 80 lb bag counts, with waste built in.
- [Drywall Calculator](https://www.brix.so/tools/drywall-calculator): Free drywall calculator: get wall and ceiling square footage, 4×8, 4×10 or 4×12 sheet counts with waste, plus joint tape and joint compound estimates.
- [Fence Calculator](https://www.brix.so/tools/fence-calculator): Free fence calculator: get posts, rails, pickets, post-hole size and bags of concrete for any wood fence run, with gates and picket spacing built in.
- [Flooring and Tile Calculator](https://www.brix.so/tools/flooring-calculator): Free flooring and tile calculator: get square footage, boxes, tile pieces and thinset with the right waste for straight, diagonal or herringbone layouts.
- [Gravel Calculator](https://www.brix.so/tools/gravel-calculator): Free gravel calculator: get cubic yards and tons of crushed stone, pea gravel or river rock for driveways, paths and pads, with compaction built in.
- [Mulch Calculator](https://www.brix.so/tools/mulch-calculator): Free mulch calculator: enter bed size and depth to get cubic yards for bulk delivery and 2 cu ft bag counts, including round tree rings.
- [Paint Calculator](https://www.brix.so/tools/paint-calculator): Free paint calculator: enter room size, doors, windows and coats to get wall and ceiling square footage and how many gallons and quarts to buy.
- [Pipe Size Calculator](https://www.brix.so/tools/pipe-size-calculator): Rule-of-thumb water pipe size calculator: add the fixtures running at once, pick copper, PEX or PVC, and see the smallest size under the velocity limit.
- [Roofing Calculator](https://www.brix.so/tools/roofing-calculator): Free roofing calculator: turn a footprint and pitch into roof square footage, squares and shingle bundles, with waste, starter, ridge cap and underlayment.
- [Topsoil Calculator](https://www.brix.so/tools/topsoil-calculator): Free topsoil calculator: get cubic yards, bag counts and an upper weight estimate for new lawns, regrading and raised beds, with a settling allowance.
- [Voltage Drop Calculator](https://www.brix.so/tools/voltage-drop-calculator): Free voltage drop calculator for copper and aluminum, single and three phase: drop in volts and percent, plus the smallest wire size for a 3% target.

## Pricing and profit

- [Break-Even Calculator for Service Businesses](https://www.brix.so/tools/break-even-calculator): Find how many jobs and how much revenue your service business needs each month to break even, and what it takes to hit your profit target.
- [Customer Financing Calculator: Quote a Monthly Payment](https://www.brix.so/tools/customer-financing-calculator): Turn a job quote into a monthly payment for homeowners. Enter price, APR and term to see the payment, your dealer fee, and the price that nets your quote.
- [Flat Rate Pricing Calculator](https://www.brix.so/tools/flat-rate-pricing-calculator): Set flat-rate prices for service tasks: book hours × selling rate plus marked-up parts. See your margin, and what you earn when a job runs long or short.
- [Gross Profit per Truck Calculator](https://www.brix.so/tools/gross-profit-per-truck-calculator): Calculate gross profit per truck per day, month and year, the daily number each truck needs to cover overhead, and whether adding a truck will pay.
- [How Much to Charge per Hour as a Contractor](https://www.brix.so/tools/contractor-hourly-rate-calculator): How much to charge per hour as a contractor: build your rate from wage, labor burden, overhead, billable hours and profit. Free calculator with examples.
- [Job Costing Calculator](https://www.brix.so/tools/job-costing-calculator): Compare estimated and actual job costs line by line. See your real gross margin, which costs ran over, and how much profit fade cost you on the job.
- [Job Pricing Calculator for Contractors](https://www.brix.so/tools/job-pricing-calculator): Price any job for profit: enter labor hours, burdened rate, materials, overhead and target profit to get the price to quote, your margin and markup.
- [Labor Burden Calculator](https://www.brix.so/tools/labor-burden-calculator): Calculate labor burden with 2026 payroll tax rates, workers' comp, benefits, PTO and unbillable time. See an employee's true cost per billable hour.
- [Maintenance Agreement Pricing Calculator](https://www.brix.so/tools/maintenance-agreement-calculator): Price HVAC, plumbing, pest control and lawn care maintenance agreements from your real costs. Get yearly and monthly prices, margin and tech hours needed.
- [Markup and Margin Calculator](https://www.brix.so/tools/markup-margin-calculator): Convert markup to margin and margin to markup, or find both from cost and price. Free calculator with a markup-to-margin chart and trade examples.
- [Overhead Rate Calculator](https://www.brix.so/tools/overhead-rate-calculator): Calculate your overhead rate as a % of revenue, % of direct labor and $ per billable hour. See what to count as overhead and how to price it into jobs.
- [Technician Utilization Calculator](https://www.brix.so/tools/technician-utilization-calculator): Measure technician utilization, efficiency and productivity, and see how much revenue a few more job hours per tech per week would add each year.

## Sales, leads and follow-up

- [Booking Rate and Close Rate Calculator](https://www.brix.so/tools/booking-rate-calculator): Free booking rate and close rate calculator for home service pros. See your lead-to-sale rate and what better booking or close rates are worth a year.
- [Customer Acquisition Cost Calculator](https://www.brix.so/tools/customer-acquisition-cost-calculator): Free CAC calculator for contractors: find what each new customer costs in marketing and sales, how many jobs it takes to pay back, and your CLV:CAC ratio.
- [Customer Lifetime Value Calculator](https://www.brix.so/tools/customer-lifetime-value-calculator): Free CLV calculator for trades businesses: see what a customer is worth in lifetime revenue and gross profit, and how much you can spend to win one.
- [Speed to Lead Calculator](https://www.brix.so/tools/speed-to-lead-calculator): What is answering leads in 5 minutes worth? Enter your leads, response times and booking rates to see the extra jobs and revenue from faster replies.

## Taxes

- [Mileage Deduction Calculator for Contractors (2026)](https://www.brix.so/tools/mileage-deduction-calculator): Free 2026 mileage deduction calculator with both IRS rates (72.5¢ Jan–June, 76¢ July–Dec). Compare standard mileage vs. actual expenses for your truck.
- [Quarterly Estimated Tax Calculator for Self-Employed Contractors (2026)](https://www.brix.so/tools/quarterly-estimated-tax-calculator): Free 2026 quarterly estimated tax calculator for self-employed contractors. See your safe-harbor payment, each due date, and what to set aside.
- [Section 179 Calculator for Trucks, Vans and Equipment (2026)](https://www.brix.so/tools/section-179-calculator): Free 2026 Section 179 calculator for trucks, vans and equipment. Applies the $2,560,000 limit, $32,000 SUV cap, business use and 100% bonus depreciation.
- [Self-Employment Tax Calculator (2026)](https://www.brix.so/tools/self-employment-tax-calculator): Free 2026 self-employment tax calculator for contractors. See your Social Security and Medicare tax, the deductible half, and what to save monthly.

## Money and accounting

- [Cash Flow Runway Calculator for Trades Businesses](https://www.brix.so/tools/cash-flow-runway-calculator): Free cash runway calculator: see how many months your business can cover payroll and bills at the current burn rate, and what it takes to break even.
- [Days Sales Outstanding (DSO) Calculator for Contractors](https://www.brix.so/tools/dso-calculator): Free days sales outstanding calculator for contractors. See how long customers take to pay, how much cash is tied up in receivables, and what it costs you.
- [Equipment Loan Calculator for Contractors (Trucks, Vans, Machinery)](https://www.brix.so/tools/equipment-loan-calculator): Free equipment loan calculator for trucks, vans and machinery: monthly payment, total interest, yearly amortization, and whether it pays for itself.

## AI receptionists and answering services

- [AI Receptionist ROI Calculator: AI vs. Answering Service vs. In-House CSR](https://www.brix.so/tools/ai-receptionist-roi-calculator): Compare an AI receptionist, a human answering service and an in-house CSR on your own calls, using published 2026 prices and BLS wage data.
- [Answering Service Cost Calculator](https://www.brix.so/tools/answering-service-cost-calculator): Compare what your calls cost on published answering service plans: Ruby, PATLive, Smith.ai, AnswerConnect and AI answering. Prices checked October 2026.

## Hiring and payroll

- [1099 vs. W-2 Cost Calculator: Employee or Subcontractor?](https://www.brix.so/tools/1099-vs-w2-calculator): Compare the full cost of a W-2 employee with a 1099 subcontractor for the same hours. Get the break-even sub rate and what each worker keeps.
- [True Cost of an Employee Calculator for Trades Businesses](https://www.brix.so/tools/payroll-cost-calculator): See what an hourly employee really costs: wages, 7.65% employer FICA, FUTA, SUTA, workers' comp and benefits, per paid and per billable hour.

## Marketing and reviews

- [Cost Per Lead Calculator (and Marketing ROI)](https://www.brix.so/tools/cost-per-lead-calculator): Free cost per lead calculator for contractors: get CPL, cost per booked job, marketing ROI, ROAS and the most you can pay per lead before you lose money.
- [Google Review Calculator: How Many Reviews You Need and What They're Worth](https://www.brix.so/tools/review-revenue-calculator): See how many 5-star Google reviews you need to reach your target rating, how many customers to ask, and what more reviews could be worth to your business.

## Calls, AI receptionists and answering

- [Missed Call Revenue Calculator](https://www.brix.so/tools/missed-call-calculator): Free calculator: see how much revenue missed calls cost your trades business per week, month and year. Enter calls, miss rate, booking rate and ticket.

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