Septic System Calculator & Material Planner
Budget a design-approved tank and absorption field with aggregate and pipe.
Project estimate
Septic System Planner
$4,739–$5,450
Material estimate + optional reserve · USD
- Absorption area
- 750 ft²
- Total trench length
- 250 ft
- Specified tank capacity
- 1,000 gal
- Working time allowance
- 3.08 days
49.25 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
- Tank
- $2,000
- Pipe
- $560
- Stone
- $1,999
- Fittings
- $180
Shopping list
0 / 4 checkedWhole packages rounded up. Edit a unit price to use your supplier's quote.
Tank
Septic tank (size entered above)
1 unit
$2,000$2,000 per unit
Pipe
Distribution pipe (10 ft)
28 lengths
$560$20 per lengths
Stone
Drain-field aggregate
30.75 yd³
$1,999$65 per yd³
Fittings
Distribution box
1 unit
$180$180 per unit
Save this project
Saved on this browser only. No account required.
Assumptions & project notes
- Material allowance: 10%. Package sizes and coverage rates are editable in the inputs.
- The loading rate and flow must come from a permitted soil and system design. A perc-test time alone is not converted to an approval.
- Check final dimensions, product specifications and any required local approvals before ordering.
Tools & preparation
- Tape measure and layout stakes
- Level or grade-checking tools
- Spade, rake and wheelbarrow where required
- Product-specific cutting and connection tools
A preparation list; confirm installation tools with your selected products.
How to use the septic system planner
Start with approved daily design flow, approved soil loading rate, absorption trench width, stone depth, approved tank size. The result includes absorption area, total trench length, specified tank capacity. Open advanced options to match your product sizes, material allowance and labor expectations.
1. Measure and specify
Measure the treated area or route and record soil, slope, access and utility constraints.
2. Adjust the estimate
Choose the actual product coverage, layer depths or irrigation performance data.
3. Prepare your order
Check delivery units, overlaps, site storage and waste before placing the order.
4. Plan the work
Schedule preparation, installation and final grading or flow checks; follow the selected product instructions.
Frequently asked questions
What does the septic system planner estimate?+
Budget a design-approved tank and absorption field with aggregate and pipe. The shopping list includes septic tank (size entered above), distribution pipe (10 ft), drain-field aggregate, distribution box.
Which assumptions should I check?+
The loading rate and flow must come from a permitted soil and system design. A perc-test time alone is not converted to an approval.
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.