Door Replacement Materials and Cost Calculator
Schedule interior, exterior, and sliding doors with slab/pre-hung options, casing, jamb, hardware, labor, and editable cost.
How to use the doors calculator
- Measure the actual project. Break irregular work into separate sections and record finished dimensions consistently.
- Enter the core measurements. The quick view focuses on project geometry; add or subtract sections where the calculator supports multiple areas.
- Review purchasing assumptions. Open Advanced inputs to replace example prices, waste, coverage, density, pack size, minimum order, or delivery assumptions with current project information.
- Calculate and verify. Review the formula, limitations, whole-unit rounding, product instructions, and supplier requirements before purchasing.
Key inputs covered: Casing sides of opening, Casing and jamb allowance, Average door unit price, Hardware example price, Labor per door, Labor example rate, Casing example price, Jamb example price, Door type, Door unit, and additional project-specific assumptions.
Result coverage: The doors calculator reports 8 separate quantities so the primary estimate and its supporting purchase or planning values can be checked together.
How the estimate works
Door groups produce unit count and two-jamb-plus-head perimeter; casing accounts for selected sides, slab-only entries add jamb stock, and editable unit/labor rates produce cost.
One 3 x 6.67 ft door has about 16.33 linear ft around both jambs and the head.
Assumptions, rounding, and limitations
Dimensions are treated as finished measurements. Only deductions and allowances entered above are included. Decimal measurements display to two places; purchase quantities round up when a whole container or piece is required.
- Door type and slab/pre-hung choices label the schedule; actual products may require different frames, thresholds, flashing, locks, trim, and labor.
- Verify handing, swing clearance, rough opening, fire/smoke rating, safety glazing, egress, accessibility, water management, and manufacturer instructions.
- No structural alteration, energy savings, security, or code-compliance claim is made.
Sources and review
These references support unit conversions and selected planning assumptions. Product instructions and local requirements control the actual project.
- NIST Handbook 44 — current unit-conversion tables
- U.S. DOE efficient residential windows, doors, and skylights guidance
Last reviewed: 2026-10-09
Editorial process
BuildPlanCalc publishes the formula, editable assumptions, limitations, and supporting references so the estimate can be checked rather than treated as a black box. See the calculation and review methodology, or report a correction.
Frequently asked questions
Are the results exact?
No. Results are planning estimates based on the dimensions and assumptions entered. Confirm product coverage, site conditions, and ordering rules with the supplier.