Stairs Calculator & Material Planner
Calculate an equal-riser layout, tread run and stringer stock.
Project estimate
Stairs Planner
$256–$294
Material estimate + optional reserve · USD
- Risers
- 4
- Actual riser height
- 7.5 in
- Horizontal run
- 2.5 ft
- Stringer diagonal
- 3.54 ft
- Working time allowance
- 0.69 days
11 person-hours / 2 people / 8 h per day. Provisional activity rates; adjust in advanced options.
Excludes labor, tax, delivery, equipment rental, permits and site work. Sample prices are not live retailer quotes. Upper budget includes 15% contingency.
Cost breakdown
- Lumber
- $224
- Hardware
- $32
Shopping list
0 / 3 checkedWhole packages rounded up. Edit a unit price to use your supplier's quote.
Lumber
Stringer blanks
4 pieces
Choose stock longer than the calculated diagonal, allowing end cuts.
$140$35 per pieces
Tread boards
6 pieces
$84$14 per pieces
Hardware
Stringer hangers
4 pieces
$32$8 per pieces
Save this project
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Assumptions & project notes
- Material allowance: 0%. Package sizes and coverage rates are editable in the inputs.
- This is a quantity takeoff, not structural sizing. Member sections, support spacing, connections, soil bearing and footing dimensions must come from an approved design. Defaults are illustrative.
- The upper floor is the final tread. The user-specified riser limit is not an automatic code check.
- Check final dimensions, product specifications and any required local approvals before ordering.
Tools & preparation
- Tape measure and framing square
- Level and layout string
- Drill / driver and specified bits
- Suitable saw and clamps
- Footing excavation and concrete tools where required
A preparation list; confirm installation tools with your selected products.
How to use the stairs planner
Start with total finished rise, chosen maximum riser height, tread depth, stair width. The result includes risers, actual riser height, horizontal run, stringer diagonal. Open advanced options to match your product sizes, material allowance and labor expectations.
1. Measure and specify
Measure the footprint, finished levels and access; settle the structural design before choosing member sizes.
2. Adjust the estimate
Match board widths, spacing, stock lengths and connections to the approved layout.
3. Prepare your order
Lay out cuts and supports, then confirm the material list with the timber and hardware supplier.
4. Plan the work
Plan foundations, framing, weather protection and final inspection in the order required by the design.
Frequently asked questions
What does the stairs planner estimate?+
Calculate an equal-riser layout, tread run and stringer stock. The shopping list includes stringer blanks, tread boards, stringer hangers.
Which assumptions should I check?+
This is a quantity takeoff, not structural sizing. Member sections, support spacing, connections, soil bearing and footing dimensions must come from an approved design. Defaults are illustrative. The upper floor is the final tread. The user-specified riser limit is not an automatic code check.
Are the prices current supplier quotes?+
No. Initial unit prices are illustrative USD budgeting inputs. Enter a price beside each material to use your own quote. The total includes materials only; labor, shipping, taxes, permits and rental are excluded.
Can I save or share my project?+
Save stores the inputs and prices on this browser. Share link includes the configuration in the address so another device can reopen it. Download CSV exports the shopping list, and Print / PDF opens your browser’s print dialog.