Free contractor tools
Contractor calculators
Straight answers to the numbers questions that decide whether a job makes money. Nothing is gated: no signup, no email, and the result is always on the page.
Markup & Margin Calculator
- The decision it helps with
- Deciding what to charge for a job, and whether a discount still leaves a profit.
- What it calculates
- Selling price, profit, markup percentage and margin percentage from any one of cost plus markup, cost plus target margin, or cost plus a price you already quoted.
- Who it is for
- Any contractor who has ever added 20% to a cost and been surprised the job only made 16.7%.
Labor Burden Calculator
- The decision it helps with
- Deciding the hourly labor cost to build your estimates on.
- What it calculates
- Total annual employer cost, burden percentage, cost per paid hour and cost per productive hour.
- Who it is for
- Contractors with employees on payroll who price work by the hour or by the crew day.
Concrete Calculator
- The decision it helps with
- Deciding how much concrete to order for a pour.
- What it calculates
- Base volume in cubic feet and cubic yards for one or more rectangular sections, a waste allowance you control, and the order quantity rounded up to your supplier's increment.
- Who it is for
- Anyone pouring concrete: slab, driveway, footings, shed pad, garage floor.
Overhead Recovery Calculator
- The decision it helps with
- Deciding how much overhead every job has to carry before you make a dollar.
- What it calculates
- Total annual overhead, the recovery basis you chose, overhead per productive hour and overhead as a percentage of direct cost.
- Who it is for
- Owners paying rent, insurance, software, a truck payment and an office phone out of job revenue.
Contractor Hourly Rate Calculator
- The decision it helps with
- Deciding the hourly rate you can charge and still pay for the business.
- What it calculates
- Wage, loaded labor cost, overhead per hour, cost per productive hour, selling rate, profit per hour, margin and markup.
- Who it is for
- Contractors quoting time and materials, service calls or a crew day rate.
True Job Cost Calculator
- The decision it helps with
- Deciding what a job really costs you before you put a price on it.
- What it calculates
- Every cost class separately, the direct cost subtotal, any overhead you explicitly allocate, and the true job cost.
- Who it is for
- Contractors who keep forgetting the dump run, the permit and the delivery fee.
Job Profit Calculator
- The decision it helps with
- Deciding whether a job actually made money, and how much.
- What it calculates
- Revenue including approved change orders, total cost, profit in dollars, profit margin and markup on cost.
- Who it is for
- Contractors closing out a job, or sanity-checking a price before signing.
Estimate vs Actual Calculator
- The decision it helps with
- Deciding how far a finished job drifted from the estimate, in facts not opinions.
- What it calculates
- Cost variance in dollars and percent, expected profit and margin, and final profit, profit variance and margin difference once a final revenue is known.
- Who it is for
- Contractors reviewing a completed job against the estimate they priced it from.
How these tools fit together
A price is only as good as the cost underneath it. The labor burden calculator gives you the hourly cost of an employee on the job; the markup and margin calculator turns any cost into a price and shows the profit left after a discount; the concrete calculator gives you a material quantity you can price. Each one answers the question in front of you and then points at the decision that follows it.
What you can expect
- The answer is on the page. No account, no email, no download.
- Every result comes from the same calculation engines RHACOVA uses internally, with exact decimal arithmetic — never floating-point money.
- Each result can be opened up: “Why this number?” shows the formula, the normalized inputs and the engine version behind it.
- Nothing you type is sent anywhere. Inputs stay in your browser so the page remembers them on your next visit.
Concrete quantity calculators
The concrete calculator is the starting point for any pour. Four focused pages sit under it for the quantities contractors look up by name:
- Concrete Slab Calculator — How much concrete does one rectangular slab take?
- Concrete Driveway Calculator — How much concrete does a driveway of this size take?
- Concrete Footing Calculator — How much concrete do these footings or pads take?
- Rebar Calculator — How many bars and linear feet does this grid take?
Continue into the product
The calculators answer one decision at a time. RHACOVA connects those same definitions in a real estimate, proposal and job-costing workflow. See how the contractor estimating system works, or review pricing.
More tools are coming
We publish a tool when it is finished and its math is tested — not before, which is why you will not find placeholder links on this page. The list above is everything that is live today.