Calculators and invoice generators built for HVAC, plumbing, and electrical shops. Every one runs in your browser, needs no account, and is genuinely free to use and share. Built by the team behind FieldForge.
Find the hourly rate your business actually needs, from your target pay, real overhead, and billable hours.
Turn a cost into the right price, and see why a 50% markup is only a 33% margin.
Work out what a truck roll really costs you, and set a diagnostic fee that covers it.
Convert salary to hourly or back, with weekly, monthly, and take-home pay.
See what an ad spend, a truck, or a hire actually returned, with annualized ROI.
Final price and savings from a percent or dollar discount, plus what it costs your margin.
Project revenue year by year from a starting number and an annual growth rate.
Find the right AC size in tons from square footage, climate, insulation, and sun, snapped to a real unit.
How many BTU to heat or cool a room, adjusted for sun, people, kitchens, and climate.
Estimate cooling tons and heating BTU from square footage, climate, insulation, and windows.
Size round and rectangular duct from CFM and a target velocity, and check the result.
Required airflow from AC tonnage or from a room's air changes per hour.
Size a tank by first hour rating or a tankless by flow rate and temperature rise.
Build a clean, printable invoice for any trade right in your browser. No signup.
An HVAC invoice with equipment model and serial fields, ready to fill and print.
A plumbing invoice with fixtures, parts, labor, and permit lines, ready to send.
An electrical invoice with license number, materials, and labor lines, ready to print.