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Missed Call Cost Calculator
Quantify the revenue HVAC, plumbing, and electrical shops lose when calls go unanswered: enter your call volume, miss rate, booking rate, and average job value with trade-specific defaults.
Free tools for contractors
Free Tools for HVAC, Plumbing & Electrical Contractors
Calculators, templates, and generators built for home service businesses. Price jobs accurately, download professional documents, and grow your shop, all free.
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Every trade gets its own calculators, templates, and generators, plus universal tools that work for any contractor.
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Start with the calculators and templates contractors in your trade use most.
Calculator
Profit Margin Calculator
Calculate net profit per HVAC job after labor, parts, and overhead.
Technical
BTU Calculator
Estimate heating and cooling BTUs from room size, climate zone, insulation, ceiling height, windows, and sun exposure, with tonnage recommendations for AC and heating.
Technical
Water Pipe Sizing Calculator
Size domestic water supply and drainage piping from fixture units (WSFU/DFU): peak GPM demand, recommended pipe sizes, and optional IPC Appendix E pressure-based service main sizing.
Technical
Wire Size Calculator
Size copper or aluminum conductors per NEC Table 310.16 ampacity, with ambient temperature correction, bundling derating, voltage drop check, OCPD recommendation, and equipment grounding conductor per Table 250.122.
Calculator
Customer Lifetime Value Calculator
Calculate what a repeat customer is worth over time.
Calculator
Marketing ROI Calculator
Measure return on Google Ads, mailers, and other lead sources.
Generators
Auto-generate review links, business names, slogans, and job descriptions.
Generator
Google Review Link Generator
Create a shareable link customers can use to leave Google reviews.
Generator
Business Name Generator
Get HVAC business name ideas that sound local and trustworthy.
Generator
Slogan Generator
Generate marketing taglines for your HVAC brand and truck wraps.
Generator
Job Description Generator
Write HVAC technician and dispatcher job postings faster.
Calculators
Math-based tools for pricing, margins, sizing, and technical sizing.
Calculator
Contractor Tax Calculator
Estimate quarterly tax set-aside for home service business owners.
Calculator
Customer Lifetime Value Calculator
Calculate what a repeat customer is worth over time.
Calculator
Marketing ROI Calculator
Measure return on Google Ads, mailers, and other lead sources.
Calculator
Business Valuation Calculator
Estimate what your business could sell for: SDE × industry multiple with a value range.
Calculator
Employee Cost Calculator
True cost of hiring a tech including taxes, benefits, and vehicle.
Calculator
Labor Cost Calculator
Total burdened labor cost for a job: loaded rate × hours × crew, plus labor as a % of the price.
Calculator
Crew & Subcontractor Cost Split Calculator
Split a job’s revenue and cost across crew, subs, and materials: see the margin on each.
Calculator
Break-Even Calculator
Find the monthly revenue and jobs your shop needs to cover all fixed costs.
Calculator
Equipment ROI Calculator
See if a truck, tool, machine, or software pays for itself: payback period and return on investment.
Calculator
Financing Calculator
Turn any job price into a monthly payment: show "$X/month," compare terms, and see total interest.
Calculator
Markup & Margin Calculator
Turn part and material cost into the right sell price: convert markup to margin (and back) and stop underpricing every job.
Technical
BTU Calculator
Estimate AC and heating BTUs from room size, climate zone, insulation, and building factors, with tonnage recommendations.
Calculator
Profit Margin Calculator
Calculate net profit per HVAC job after labor, parts, and overhead.
Calculator
Labor Rate Calculator
Determine your true hourly labor cost including burden and benefits.
Signature
Missed Call Cost Calculator
See how much revenue you lose when HVAC calls go to voicemail.
Calculator
Job Pricing Calculator
Price individual HVAC repair and install jobs with confidence.
Calculator
Bid Calculator
Build a cost-plus bid for HVAC installs and projects: materials, labor, overhead, and margin.
Calculator
Service Price Calculator
Set a flat-rate HVAC service price from loaded labor, materials, overhead, and target margin.
Calculator
Overhead Calculator
Break down fixed costs and allocate overhead per billable hour.
Technical
HVAC Load Calculator
Estimate heating and cooling load for residential HVAC sizing: climate zone, insulation, internal gains, and recommended tonnage.
Technical
HVAC Duct Size Calculator
Size round and rectangular ducts from CFM and target air velocity: standard sizes, equivalent diameter, and friction loss.
Sales
SEER Energy Savings Calculator
Show customers the annual energy savings and payback when upgrading to a higher SEER/SEER2 AC or heat pump.
Technical
Static Pressure Calculator
Diagnose total external static pressure or design duct friction rate: TESP vs blower rating and ACCA Manual D available static pressure.
Technical
Duct Weight Calculator
Estimate sheet-metal weight of round and rectangular duct by gauge and material, for material takeoffs, freight, and hanger sizing.
Technical
ACH Calculator
Find air changes per hour from airflow and room volume, or the CFM needed to hit a target ACH, with recommended ranges for 30+ space types.
Technical
HVAC CFM Calculator
Calculate required airflow in CFM from tonnage, sensible load and ΔT, or room air changes per hour.
Technical
Hydronic Flow Rate (GPM) Calculator
Find loop GPM from BTU/hr and design ΔT, check velocity in copper or PEX, and correct the 500 constant for glycol.
Technical
Superheat & Subcooling Calculator
Convert suction and liquid-line pressure to saturation temperature, get actual superheat and subcooling, and check the charge against the target-superheat chart or the 8-12 °F TXV subcooling window.
Technical
Refrigeration BTU Calculator
Size walk-in cooler and freezer refrigeration equipment from box dimensions, insulation, product load, and door usage.
Technical
Water Pipe Sizing Calculator
Size supply and drainage piping from fixture units: WSFU, DFU, peak GPM, and IPC pressure-based service main sizing.
Technical
Water Heater Sizing Calculator
Size storage tank (FHR) or tankless (GPM/BTU) from peak-hour demand: DOE worksheet method with groundwater temperature and fuel type.
Technical
Drain Pipe Slope Calculator
Solve drain fall, slope, or maximum run against the IPC Table 704.1 minimum, plus a half-full Manning velocity check.
Technical
Pipe Volume Calculator
Get the gallons, litres, and water weight in any pipe run, plus fill time, flush volume, and the scour-velocity check.
Technical
Water Pressure Loss Calculator
Find the residual pressure left at the fixture: Hazen-Williams friction, fitting equivalent lengths, elevation, meter and backflow losses.
Technical
Sump Pump Sizing Calculator
Size a sump pump from a basin drawdown test or a footprint estimate: GPM at total dynamic head, HP class, and cycle-rate check.
Technical
Gas Pipe Sizing Calculator
Size natural gas or propane pipe by the longest-length method: connected load in BTU/hr and CFH, minimum Schedule 40 size, and spare capacity.
Technical
Wire Size Calculator
Size conductors per NEC 310.16 ampacity with derating, voltage drop, OCPD, and EGC recommendations.
Technical
Voltage Drop Calculator
Check voltage drop over distance, find minimum wire size, or max run length per NEC 3% / 5% limits.
Technical
Conduit Fill Calculator
Check raceway fill against NEC Chapter 9 Table 1: 53/31/40/60% limits, minimum trade size, and every size compared.
Technical
Ohm’s Law Calculator
Solve any two of voltage, current, resistance, and power with the full 12-formula Ohm’s law wheel.
Technical
Watts to Amps Calculator
Convert between watts, amps, and volts for DC, single-phase, and three-phase circuits with power factor.
Technical
Conduit Bend Calculator
Offset, 90° stub-up, and 3-bend saddle marks: multiplier, shrink, and take-up for EMT hand bending.
Technical
Motor FLA Calculator
NEC Table 430.248/430.250 full-load amps by HP and voltage, plus 125% conductor and breaker/fuse sizing.
Technical
Transformer Sizing Calculator
Size a dry-type transformer from connected load: standard kVA rating, primary/secondary FLA, and NEC 450.3(B) OCPD and conductor sizing.
Technical
Box Fill Calculator
Calculate required box volume per NEC 314.16: conductors, clamps, yokes, grounds, and terminal blocks, with pass/fail and the smallest box that works.
Technical
Generator Sizing Calculator
Size a standby generator from your load list: running vs peak starting watts, kW/kVA, transfer switch amps.
Technical
Electrical Load Calculator
NEC 220 dwelling service load: standard or optional method, with demand factors, service size, and spare capacity.
Best tools
Our popular tools
Calculators and templates contractors use most, start here.
Signature
Missed Call Cost Calculator
Quantify the revenue HVAC, plumbing, and electrical shops lose when calls go unanswered: enter your call volume, miss rate, booking rate, and average job value with trade-specific defaults.
Calculator
Profit Margin Calculator
Calculate net profit per HVAC job after labor, parts, and overhead.
Technical
BTU Calculator
Estimate heating and cooling BTUs from room size, climate zone, insulation, ceiling height, windows, and sun exposure, with tonnage recommendations for AC and heating.
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Related resources for contractors
- Browse templates
Business Templates
Free downloadable invoices, estimates, work orders, and agreements for every trade.
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State-by-state license requirements, exams, fees, and official board links for every trade.
- Read guides
Contractor Blog
Practical guides on pricing, hiring, marketing, and operations for home service businesses.
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Meet Crew
Your AI receptionist that answers every call, books jobs, and follows up on leads 24/7.
- Follow the work
Watch the work before you hear from us
Diagnostics, installs and the odd bad attic, from contractors who film their own jobs.
Why tools?
Why contractors use free business tools
Running a home service business means making dozens of pricing, hiring, and marketing decisions every week, often without a finance team or marketing department backing you up. Free calculators help you understand margins before you quote a job. Templates keep invoices and estimates consistent across your crew. Generators save hours on repetitive tasks like review links and job postings.
CloseCrew built these tools for HVAC, plumbing, and electrical contractors who want to run a tighter operation without paying for generic software. Use the profit margin calculator before raising prices. Download an estimate template that matches how your techs actually work. Generate a Google review link you can text customers after every completed job.
Pair these free tools with Crew, your AI receptionist, to capture every lead while your paperwork stays organized. Tools help you quote and operate smarter; Crew makes sure no call goes unanswered.
Worth asking before you book
Free tools FAQs
Yes. Every calculator, template, and generator on CloseCrew is free to use. We built them for HVAC, plumbing, and electrical contractors who need professional business tools without paying for generic software.
Calculators and generators work without an account. Some template downloads may ask for your email so we can send you the file, you can unsubscribe anytime.
Start with the profit margin calculator and missed call cost calculator to understand your numbers. Then download an estimate template and invoice template so every customer interaction looks professional from day one.
Yes. Each trade has its own calculators, templates, and generators with trade-specific defaults. Universal tools like marketing ROI and customer lifetime value work for any home service business.
Absolutely. Contractors use free tools to price jobs and stay organized while Crew, your AI receptionist, handles inbound calls, booking, and follow-ups. Tools help you run smarter; Crew helps you capture every lead.
