TREE SERVICE ESTIMATING
Homeowners type “tree removal cost” and see $200–$2,000. That range is not a market. It is what happens when a 12-inch street pine and a 36-inch backyard oak get priced with the same rule. If you run a crew, the job is to bid the stop you are actually going to work — not the average of someone else’s internet answers.
Use the free tree service bid calculator to run the arithmetic. This page is the method behind it.
Diameter at breast height is the one measurement every estimator already takes. The mistake is treating it as linear. Trunk volume — and the climbing, rigging, and chipping that ride with it — grows closer to the square of diameter. A 24-inch tree is about four times the wood of a 12-inch tree of the same height, not twice. A flat “$25 an inch” quote underprices the oak that takes the afternoon and overprices the ornamental you could have finished before lunch.
Height matters, but less than people think once the tree is past a story or two. A 40-foot and a 70-foot tree of the same DBH are not the same job, and they are also not twice as different as the diameters. Species is a modifier (hardwood is denser and slower; palm is a different job), not the main event.
The same 18-inch maple is a different bid on the driveway than it is over a ranch roof with the chipper on the street. Carry distance, a fence you cannot drop, and a target you have to rig away from all add hours without adding wood. Power lines are not a percentage you invent on the hood of the truck — they are either in the bid, a utility hold, or a walk-away.
A crane day is a real cost. Charge it once for the stop if any tree needs it, not as a vague “hard access” bump that disappears when the homeowner asks you to sharpen the pencil.
A mobilization minimum protects the 20-minute drive for a 6-inch ornamental. If the priced job is under that floor, the quote is the floor.
Walk-away is total cost — labor, equipment, dump, overhead. Below that the job makes nothing. Price per inch of total DBH is the sanity check against last month’s work. If a stop comes out at $12 an inch on hard access, the hours or the fees are wrong. If it comes out at $90 an inch on a street pine, you are about to lose the job to someone who actually timed it.
This is not a tree appraisal, a hazard rating, or advice to remove a tree. It is not a wage determination. It does not replace walking the site, checking for utilities, or knowing your own crew. The calculator is arithmetic on numbers you type. You remain the estimator.
Open the calculator and price a stop
Most profitable crews bid time and materials from diameter at breast height, height, species, access, and targets — not a flat per-inch rule and not a day-rate guess. Wood volume scales with the square of DBH, so a 24-inch tree is about four times the wood of a 12-inch tree of the same height.
A linear per-inch price underprices the big tree and overprices the small one. Hours grow closer to DBH squared because that is how trunk volume grows. Access, power lines, and a backyard carry then change the hours more than species does.
Stump grinding, haul and dump fees, the drive for the whole crew and chipper, payroll burden, and a mobilization minimum on small ornamental trees. Those five lines are how a quote that looked fine loses money.