Free business calculators for HVAC, plumbing, and trades companies
Use the Wrench Grid calculator library to find the numbers that usually hide inside a service business: true labor cost, profitable hourly rate, truck cost, overhead, missed-call loss, unsold estimate recovery, marketing ROI, review value, and website ROI. These tools are built for owners who need pricing math they can act on, including unsold estimate recovery, not generic spreadsheet theory.
Most trades companies do not have a lead problem only. They have a math visibility problem.
A service company can look busy and still leak profit. The phones may ring, technicians may stay booked, trucks may roll every morning, and the owner may still feel like the bank account never reflects the amount of work being done. That usually happens because the business is making decisions from surface numbers instead of real numbers.
Surface numbers sound like: “We charge $125 per hour,” “The truck is already paid for,” “We missed a few calls,” or “The website is just a monthly expense.” Real numbers go deeper. A real hourly rate includes payroll burden, non-billable time, benefits, callbacks, training, shop overhead, dispatch time, software, fuel, insurance, warranty reserve, and profit. A real missed call number includes call volume, miss rate, booking rate, close rate, average ticket, gross margin, and lifetime value. A real website ROI number connects traffic, conversion rate, booked calls, close rate, average job value, and monthly cost.
The calculator library exists because each profit leak has a different formula. A missed-call calculator should not use the same logic as a truck-cost calculator. A labor calculator should not be a generic hourly wage multiplier. A marketing ROI calculator should not ignore gross margin. When the inputs match the real business decision, the output becomes useful enough for an owner to act on.
This page brings the calculator library together in one place so you can quickly see what each tool measures, when to use it, and which number to fix first.
Profit leak snapshot
Before you spend more money on leads, use the calculators to spot where profit may already be leaking through labor, trucks, missed calls, overhead, marketing, and reviews.
Pick the business number you need to know
Every calculator below is built to help you answer a specific business question. Open the one that matches the number you need to understand, then use the result to improve pricing, follow-up, job quality, or marketing decisions.
Real Cost of Labor Calculator
Find the true hourly labor cost after wages, payroll burden, benefits, overhead, non-billable time, and billable utilization. This is the calculator to use before changing hourly rates or quoting labor-heavy jobs.
Open CalculatorHVAC Hourly Rate Calculator
Calculate a profitable HVAC hourly rate using technician wage, payroll burden, truck cost, warranty reserve, overhead, seasonality, and target margin. Use it for service, maintenance, install support, and diagnostic labor planning.
Open CalculatorPlumbing Hourly Rate Calculator
Calculate a plumbing hourly rate that accounts for licensed labor, helper cost, truck stock, emergency work, disposal, equipment, overhead, and profit target.
Open CalculatorService Call Pricing Calculator
Calculate a service call fee using drive time, diagnostic time, truck roll cost, booking rate, close rate, and gross margin. Use it to avoid underpricing the first visit.
Open CalculatorBreak-Even Calculator
Calculate how many jobs, booked calls, and monthly revenue your company needs to cover fixed costs before profit starts. This is the owner dashboard number every shop should know.
Open CalculatorEmployee Cost Calculator
Estimate the true annual cost of an employee including wages, taxes, workers compensation, benefits, PTO, training, callbacks, uniforms, and management time.
Open CalculatorTruck Cost Calculator
Calculate monthly, daily, per-job, and per-billable-hour cost of keeping a service truck on the road, including fuel, insurance, financing, maintenance, tools, and stock.
Open CalculatorOverhead Calculator
Spread office, rent, admin, software, insurance, phones, accounting, marketing, and management costs across technicians, jobs, and billable hours.
Open CalculatorMaintenance Agreement Calculator
Estimate maintenance agreement revenue, visit cost, renewal impact, upsell potential, cancellation risk, and margin. Use it before pricing tune-up plans too low.
Open CalculatorUnsold Estimate Recovery Calculator
Estimate how much revenue may be sitting inside open quotes and unsold estimates. Use it to calculate recoverable jobs, recovered revenue, annual opportunity, and the value of better follow-up before buying more leads.
Open CalculatorMarketing ROI Calculator
Calculate marketing ROI from ad spend, leads, booked calls, close rate, average ticket, gross margin, and repeat customer value.
Open CalculatorMissed Call Calculator
Estimate revenue lost from unanswered calls using call volume, missed-call rate, booking rate, close rate, average ticket, and margin. This supports missed-call text-back and booking automation.
Open CalculatorGoogle Review Value Calculator
Estimate how better review volume and rating can influence calls, booked jobs, revenue, and gross profit. Use it to justify review requests and reputation follow-up.
Open CalculatorWebsite ROI Calculator
Calculate website ROI from visitor traffic, conversion lift, booked calls, close rate, average ticket, and monthly website cost. Use it to show why a website is not just an online brochure.
Open CalculatorSee what the numbers can reveal
These examples show how a calculator can turn a vague business concern into a number you can act on. Use them to compare your own situation and decide which leak to fix first.
Owner scorecard
A quick snapshot of the numbers many owners watch before changing pricing, staffing, or ad spend.
This kind of scorecard helps you see whether the pressure is coming from price, truck cost, overhead, calls, or margin.
Missed call revenue example
A small answer-rate problem can quietly turn into a large monthly revenue leak.
One missed call is rarely just one missed call. It can become a lost service job, lost replacement lead, or lost maintenance customer.
Hourly rate breakdown example
A healthy hourly rate has to carry labor, truck cost, overhead, warranty reserve, and profit.
Use rate math before you add volume. More calls do not help if the hourly rate is still underpriced.
Start with the leak closest to the cash register
The best way to use these calculators is not to open all of them at once. Start with the number that is most likely to explain why the business feels busy but profit feels thin.
1. Price protection
Start with labor cost, hourly rate, overhead, truck cost, employee cost, and service call pricing. These calculators help protect margin before the company takes on more jobs. More volume will not fix a broken price model.
2. Revenue recovery
Then use missed calls, website ROI, marketing ROI, review value, and maintenance agreement math. These calculators show where already-existing demand is being lost because calls are not answered, estimates are not followed up, or the website does not convert.
3. Owner decision
Finally, connect the numbers to the Wrench Grid AI report, booking flow, and Profit Center. The goal is to help the owner see what to fix first, what to stop guessing about, and where automation can produce the fastest lift.
Turn the numbers into action
A useful calculator does more than confirm a number. It gives you a clearer decision. Once you see the result, the next question is what should change: pricing, dispatching, staffing, follow-up, call handling, review flow, or website performance.
For example, a missed-call result may tell you to improve answer rate and text-back follow-up. A labor-cost result may tell you to raise your hourly rate or improve technician utilization. A website ROI result may tell you that traffic is not the main issue and conversion is the leak to fix first.
The goal of the Profit Center is to help you move from “I think” to “I know.” When you know the number, you can decide faster, explain the change to your team more clearly, and avoid spending money in the wrong place.
Start with the biggest leak, fix the easiest win first, then move to the next number. That approach usually beats trying to change everything at once.
Want the next step?
Use the calculators to find the leak, then run the free AI report to see where Wrench Grid would improve the website, follow-up, booking, and profit-center system.
What a good result should help you answer
Before you ever touch the input fields, a good calculator should help you answer four practical questions: What problem am I measuring? Which inputs matter most? What result am I looking for? And what business decision should follow after I see the answer?
The explanation around the result should match the topic. Labor cost should help you think about payroll burden, utilization, and non-billable hours. Truck cost should help you think about financing, fuel, repairs, and cost per job. Review value should help you connect reputation, trust, and booked calls.
Short examples also make the math easier to trust. A three-truck HVAC company running 180 calls per month with a 12 percent missed-call rate and a 55 percent booking rate may be losing thousands in monthly opportunity. Seeing a realistic example helps you compare your own numbers to a real-world scenario.
Most important, every result should point to a next move. Some owners need to tighten pricing. Some need to improve follow-up. Some need to protect margin. Others need to turn more traffic into booked jobs. The right number should lead to a clear next step.
Common questions about the calculator library
Which calculator should I start with?
Start with the number closest to the pain you feel right now. If jobs feel busy but margin feels thin, start with labor cost, hourly rate, or overhead. If calls are coming in but not turning into revenue, start with missed calls, website ROI, or marketing ROI.
Are these calculators only for HVAC companies?
No. They are especially useful for HVAC, plumbing, and other service businesses that run trucks, field technicians, inbound calls, and recurring overhead. Many owners in related trades can use the same math.
Will the results be exact?
The results are decision estimates based on the inputs you provide. The closer your inputs are to real business numbers, the more useful the result will be. The goal is not perfect accounting. The goal is better visibility and better decisions.
What should I do after I find a profit leak?
Use the result to pick a next move. That may mean adjusting pricing, improving call handling, tightening follow-up, increasing review flow, or running the free AI report to see where Wrench Grid can improve the website and lead system.