Water Heater Calculator & Material Planner
Tankless thermal input or storage first-hour demand, with installation materials.
Project estimate
Water Heater Planner
$1,331–$1,531
Material estimate + optional reserve · USD
- Tankless heating input
- 194,600 BTU/hour
- Storage minimum first-hour demand
- 0 gal
- Working time allowance
- 0.59 days
9.5 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
- Equipment
- $1,000
- Plumbing
- $151
- Venting
- $180
Shopping list
0 / 4 checkedWhole packages rounded up. Edit a unit price to use your supplier's quote.
Equipment
Water heater
1 unit
$1,000$1,000 per unit
Plumbing
Water connections
17 ft
$51$3 per ft
Isolation / service valve set
1 set
$100$100 per set
Venting
Approved vent allowance
1 set
$180$180 per set
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.
- Tank sizing uses peak-hour demand and the product first-hour rating, not tank gallons alone. Tankless input is an energy balance; check rated flow at the actual temperature rise.
- Check final dimensions, product specifications and any required local approvals before ordering.
Tools & preparation
- Tape measure, straightedge and level
- Marking and layout tools
- Suitable cutting and fastening tools
- Product-specific preparation and finishing tools
A preparation list; confirm installation tools with your selected products.
Reference material
How to use the water heater planner
Start with water heater type, simultaneous hot-water flow, required temperature rise, thermal efficiency, peak-hour hot-water demand, length. The result includes tankless heating input, storage minimum first-hour demand. Open advanced options to match your product sizes, material allowance and labor expectations.
1. Measure and specify
Measure each room or surface and identify openings, edges, fixtures and transitions.
2. Adjust the estimate
Check package coverage, material orientation, pattern alignment and substrate requirements.
3. Prepare your order
Review full-piece cuts and matching accessories; order from consistent product batches where needed.
4. Plan the work
Prepare the surface and follow the product installation and finishing sequence, including drying or curing periods.
Frequently asked questions
What does the water heater planner estimate?+
Tankless thermal input or storage first-hour demand, with installation materials. The shopping list includes water heater, water connections, isolation / service valve set, approved vent allowance, expansion tank allowance.
Which assumptions should I check?+
Tank sizing uses peak-hour demand and the product first-hour rating, not tank gallons alone. Tankless input is an energy balance; check rated flow at the actual temperature rise.
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.