How to use this calculator
- Enter Doors.
- Enter Type.
- Press Calculate. The highlighted row is your order quantity; the note beneath it translates the number into real-world terms.
Formula & constants
2026 installed each: interior hollow-core $250–$450, solid-core $400–$700, fiberglass entry $800–$2,000, steel entry $600–$1,400, French/patio $1,500–$4,500. Every default in the fields above is editable — when your supplier’s spec sheet lists a different density, coverage rate or price, enter that number instead. The waste and compaction allowances follow common trade practice; see our methodology page for the derivation of each formula and the standards it references.
Where this fits in the project
Coating and finish quantities are coverage-rate problems: true surface area divided by the product’s rated coverage, plus a waste allowance. Prep drives success — a coating over unprofiled or damp concrete fails regardless of quantity accuracy.
How this connects to your project
No quantity stands alone — each material in the chain depends on the ones around it. These are the planning steps that pair with the door cost calculator:
- Window Cost Calculator — Doors and windows are often replaced in the same project.
- Siding Calculator — Door replacement accompanies exterior renovation.
- Garage Cost Calculator — Garage doors are a major cost in garage construction.
- Shed Cost Calculator — Sheds require at least one door.
- Insulation Calculator — Energy-efficient doors improve thermal performance.
- Lumber Calculator — Door rough openings require lumber framing.
Frequently asked questions
Prehung or slab door?
Prehung (door + frame + hinges) for new or out-of-square openings; slab only when the existing frame is true.
Fiberglass or steel entry door?
Fiberglass resists dents and fakes wood grain; steel is cheaper and more secure but shows dings. Both insulate well.
Last verified: — prices reflect current national averages. See our methodology.
Estimates are for planning. Material densities, coverage rates and prices vary by region and supplier — confirm final quantities before ordering, and check local code where structural or electrical work is involved.