Know your numbers.
Fix the right system.
A free measurement library for contractors and field-service business owners. Calculate the operational numbers that actually reflect business health, understand what each one can and can't tell you, and see which part of your business it points to.
Worked example
Close Rate
35% close rate
Real formula, worked with example numbers — try it with your own on any metric page.
Calculators & guides
Close Rate
Close rate is the percentage of qualified opportunities that turn into signed, paid work. It's a signal about your sales conversation, pricing, and follow-up — not a verdict on your whole business.
Callback Cost
Callback cost is the real dollar cost of sending someone back out to fix something related to a job you already completed — labor, travel, materials, and the productive time that visit displaced. It's a clearer signal than a raw callback percentage because it puts a number on the margin damage.
Gross Margin per Job
Gross margin per job is what's left after direct job costs — labor, materials, subcontractors, permits — are subtracted from what the customer paid. A business can post record revenue and still lose money on every job if this number isn't tracked.
By trade
Measurement guides for your trade
Each trade has its own economics — what to measure and why differs by how the work actually flows.
Methodology
Every formula here is a standard, calculable definition — not a proprietary or opaque score. Written and reviewed by Richard Fritzke, 26 years in HVAC/R and facilities operations leadership. See how this site is built and what it doesn't do.
Local — St. Petersburg & Pinellas County
Want it fixed, not just measured?
The Modern Trades Mentor works directly with local contractors on the operating gaps these numbers point to.
Talk to TMTTMT is a SubZeroMetrix affiliate, not an independent third party — optional, not required.
National — CRM & follow-up
Leads and follow-up scattered across tools?
Modern Trades CRM handles lead capture, pipeline, and follow-up in one place — sold nationally, no consulting required.
See Modern Trades CRMModern Trades CRM is an affiliated product, sold independently of TMT services.