Free Tools
Pocket-sized math for the trades.
Simple calculators for the daily questions: what to charge, what to mark up, what to put on the quote. No signup. No tracking. Built for the truck, not the office.
- A growing set of tools, all free
- New ones added regularly
- Works great on a phone in the field
Service tools
Sizing, diagnostics, and lookups for the jobsite — answers while you're still standing in front of the unit.
Range hood CFM calculator
Size the ventilation for your kitchen — by cooktop power or room size, with ductwork adjustments. Find the minimum CFM you need.
OpenSEER savings calculator
Compare an old AC to a higher-SEER unit and see the yearly and 20-year energy savings. A persuasive number for any HVAC upgrade quote.
OpenCentral AC vs mini-split
One animated house, two ways to cool it. Flip systems, click rooms on and off, crank the outdoor heat — watch the airflow, duct losses, and running cost react live.
OpenRefrigerant reference
Freon to the new A2Ls — every refrigerant that matters, searchable: GWP, ODP, safety class, glide, oils, retrofit paths, the full history, and the laws from Montreal to the AIM Act.
OpenRooftop solar savings estimator
Enter your US ZIP code and system size — get year‑one production, monthly output, and dollar savings, modeled on 20+ years of local weather data.
OpenEV charging station locator
Find public EV charging near any US ZIP or address — connector types, fast‑charge vs Level 2, and the network, mapped. Handy for scoping an electric work van.
OpenWine & beverage temperature guide
Search 90+ drinks — wine, beer, sparkling, soft drinks — for the ideal serving and storage temperature, fridge zone, and a pro tip.
OpenStatic pressure calculator
Your duct system has a blood pressure — and most run dangerously high. Add your supply and return readings to get the Total External Static Pressure, a manometer-style diagnosis, and what's choking the airflow.
OpenThe Z‑Note (field service notes)
A medicine‑inspired standard for field documentation — issue, conditions, findings, diagnosis, work, next step. Clear, consistent notes you can copy, print, or save.
OpenFinancial tools
Price it right before you shake on it — margin, rates, quotes, and the math that keeps the lights on.
Profit Leak Scanner
Eight questions, one number: how much money is quietly draining out of your business every month — and the exact prices to plug it. The one people screenshot.
OpenMarkup & margin calculator
Plug in your cost and target margin to find the right price — or work backwards from price to see what you're really keeping.
OpenHourly billable rate calculator
Working backwards from a take-home target. Plug in your overhead and billable hours to see what you actually need to charge.
OpenQuote & estimate generator
Line items, tax, totals — a clean printable quote you can hand to the customer or save as a PDF. No login, no watermark.
OpenSales tax calculator
Subtotal in, total out — by US state base rate. Handy when quoting across state lines or estimating on the fly.
OpenService pricing calculator
Stop underpricing the truck roll. Enter your costs, drive time, and target profit to get a defensible minimum service charge — with the math shown.
Open"How many jobs do I need?"
Set a monthly revenue goal and average ticket — see how many jobs a day it takes to hit it. A fast reality check for your sales target.
OpenThere's an open slot on the bench.
These tools are free because we build software for the trades for a living — this is us being useful before you ever pay us a dime. No signup walls, no watermarks, no "upgrade to unlock." And if there's a number you keep working out on a napkin or the back of a receipt, tell us. The best requests become the next tool on this page.
Request a toolTakes a minute — and a real person reads every one.