Free Calculators for Contractors
55+ free calculators and tools for every trade — concrete, HVAC, electrical, roofing, plumbing, carpentry, and more. Plus honest software reviews, startup guides, and business resources.
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Why contractors trust MyContractorTools
We test every platform hands-on, verify pricing directly with vendor sales teams, and never steer contractors toward higher-commission products. Our match-don't-steer policy means we earn from most platforms equally — so we have zero incentive to push you toward the wrong tool.
55+
Free Calculators
27
In-Depth Guides
13
Software Reviews
$0
Cost to You
Hands-on testing
Every software review includes a free trial setup, simulated business configuration, and workflow walk-through. No press-release reviewing.
Match, don't steer
We earn affiliate commissions from most platforms. That alignment is on purpose: a contractor matched to the right tool stays subscribed longer and doesn't churn. We have zero incentive to push expensive software.
Verified pricing
Every price on this site was either taken from the vendor's public page or confirmed via sales call. We update when vendors raise prices — usually within 30 days.
100% Free
No signup required. No hidden fees. Just open and use.
Built for the Trades
Not generic math calculators — tools designed for how contractors actually work.
Works on Any Device
Use it on your phone at the job site or on your computer in the office.
Trade Calculators
HVAC Load Calculator
Calculate heating and cooling loads for residential and commercial buildings.
Electrical Load Calculator
Determine total electrical load and service panel size requirements.
Plumbing Pipe Sizing
Find the right pipe diameter based on fixture units and flow rates.
Concrete Volume Calculator
Calculate cubic yards of concrete for slabs, footings, and columns.
Roofing Material Calculator
Estimate shingles, underlayment, and materials by roof area and pitch.
Landscaping Material Calculator
Calculate cubic yards of mulch, gravel, topsoil, and other materials.
Drywall Calculator
Estimate sheets of drywall, joint compound, and tape needed.
Paint Coverage Calculator
Calculate gallons of paint needed based on room dimensions and coats.
Business Calculators
Pick Your Trade — Everything You Need in One Place
Each trade hub aggregates the relevant calculators, software reviews, pricing benchmarks, and migration guides. Find everything for your trade without hunting.
Find the Right Software for Your Trade
We've tested and compared the top contractor software so you don't have to.
Best HVAC Software
Top-rated software for HVAC contractors — scheduling, dispatching, and invoicing.
Read Review →Best Plumbing Software
Field service tools built for plumbing companies of all sizes.
Read Review →Best Roofing Software
Manage estimates, crews, and materials with roofing-specific platforms.
Read Review →Best Electrical Contractor Software
Streamline bids, jobs, and billing for electrical contractors.
Read Review →Best General Contractor Software
Project management and job costing tools for general contractors.
Read Review →Not sure which software is right for you?
Take our 2-minute quiz and get a personalized match based on your trade, team size, and what matters most to your business. No email, no sales calls.
We earn from every platform we recommend, so we have zero incentive to steer you toward the wrong tool. Genuine matches = happier contractors = better business for everyone.
Free Contractor Startup Guides
Trade-specific guides covering licensing, LLC formation, insurance, pricing, and getting your first customers.
How to Start a Contracting Business (Complete Guide)
Everything you need — licensing, LLC formation, insurance, pricing your work, getting customers, and building systems that scale.
Pricing, Migration & Growth Guides
Already in business? Deep-dive content on what to charge, when to switch software, and how to grow profitably.
Pricing & Bidding
Software Migration
Looking to Leave Your Current Platform?
Outgrown your software? Hit the pricing wall? See honest alternatives — including when staying put is the right call.
Get the Free Contractor Software Buyer's Guide
We'll send you our guide comparing the top software tools for contractors — with real pricing, honest pros/cons, and trade-specific recommendations.
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