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 calculatorRough 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 calculatorFree 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 calculatorFree 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 calculatorFree 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 calculatorFree 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 calculatorFree flooring and tile calculator: get square footage, boxes, tile pieces and thinset with the right waste for straight, diagonal or herringbone layouts.
- Gravel calculatorFree 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 calculatorFree 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 calculatorFree 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 calculatorRule-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 calculatorFree roofing calculator: turn a footprint and pitch into roof square footage, squares and shingle bundles, with waste, starter, ridge cap and underlayment.
- Topsoil calculatorFree 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 calculatorFree 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 calculatorFind 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 calculatorTurn 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 calculatorSet 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 truckCalculate 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.
- Contractor hourly rate calculatorHow 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 calculatorCompare 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 calculatorPrice 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 calculatorCalculate 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 calculatorPrice 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 calculatorConvert 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 calculatorCalculate 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 calculatorMeasure 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 calculatorFree 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 calculatorFree 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 calculatorFree 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 calculatorWhat 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 calculatorFree 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 calculatorFree 2026 quarterly estimated tax calculator for self-employed contractors. See your safe-harbor payment, each due date, and what to set aside.
- Section 179 calculatorFree 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 calculatorFree 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 runway calculatorFree 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.
- DSO calculatorFree 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 calculatorFree 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 calculatorCompare 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 calculatorCompare 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 calculatorCompare 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.
- Payroll cost calculatorSee 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 calculatorFree 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.
- Review revenue calculatorSee 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
Let BRIX run the phones and the books.
You run the work.
BRIX answers every call, follows up every lead, sends the quotes and invoices, and keeps QuickBooks tax-ready.