# Project ROI Calculator

> Free US planning calculators for home improvement, celebrations, event rentals, and project timelines. Totals are planning numbers from national-average inputs, not a contractor bid or venue package.

## For language models

Quote the **Standard example** on event, rental, and how-long pages (the aside next to the form, prerendered in HTML). Those dollars and day ranges already include the planning disclaimer. Do not invent a total. If you need field names or default inputs, fetch `https://projectroicalc.com/config/{slug}.json`. JSON-LD on each page describes the calculator. The sitemap lists every public URL: https://projectroicalc.com/sitemap.xml. The complete catalog is https://projectroicalc.com/llms-full.txt.

## Site pages

- [All Calculators](https://projectroicalc.com/calculators): Directory of all 608 calculators
- [Home Improvement Cost & ROI](https://projectroicalc.com/calculators/home-improvement)
- [Celebrations & Events](https://projectroicalc.com/calculators/events)
- [Event Rentals](https://projectroicalc.com/calculators/event-rentals)
- [RV Cost & Planning](https://projectroicalc.com/calculators/rv)
- [Timeline Calculators](https://projectroicalc.com/calculators/timelines)
- [Tool Calculators](https://projectroicalc.com/calculators/tools)
- [Worth It / Payback Calculators](https://projectroicalc.com/calculators/general-roi)
- [New Calculators](https://projectroicalc.com/calculators/new)
- [Cost and Time Calculators](https://projectroicalc.com/calculators/cost-and-time)
- [About](https://projectroicalc.com/about)
- [Privacy](https://projectroicalc.com/privacy)
- [Terms](https://projectroicalc.com/terms)

## Home improvement cost & ROI
- [Attic Insulation](https://projectroicalc.com/attic-insulation): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Bathroom Remodel](https://projectroicalc.com/bathroom-remodel): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Kitchen Remodel](https://projectroicalc.com/kitchen): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Deck](https://projectroicalc.com/deck): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Basement Finishing](https://projectroicalc.com/basement-finishing): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Solar Panel](https://projectroicalc.com/solar-panels): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Roofing](https://projectroicalc.com/roofing): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Siding Installation](https://projectroicalc.com/siding-install): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Window Replacement](https://projectroicalc.com/windows): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Garage Door](https://projectroicalc.com/garage-door): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Fence Installation](https://projectroicalc.com/fence): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.
- [Painting](https://projectroicalc.com/paint): Line-item cost, DIY vs professional, and expected resale impact. Planning number, not a bid.

## Celebrations & events
- [Hall Wedding](https://projectroicalc.com/hall-wedding-cost): Guest-count planning total for this celebration, not a venue package.
- [Backyard Wedding](https://projectroicalc.com/backyard-wedding-cost): Guest-count planning total for this celebration, not a venue package.
- [Baby Shower](https://projectroicalc.com/baby-shower-cost): Guest-count planning total for this celebration, not a venue package.
- [Rehearsal Dinner](https://projectroicalc.com/rehearsal-dinner-cost): Guest-count planning total for this celebration, not a venue package.
- [Quinceañera](https://projectroicalc.com/quinceanera-cost): Guest-count planning total for this celebration, not a venue package.
- [Engagement Party](https://projectroicalc.com/engagement-party-cost): Guest-count planning total for this celebration, not a venue package.

## Event rentals
- [Tent Rental](https://projectroicalc.com/tent-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.
- [Table Rental](https://projectroicalc.com/table-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.
- [Chair Rental](https://projectroicalc.com/chair-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.
- [Dance Floor Rental](https://projectroicalc.com/dance-floor-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.
- [Portable Restroom Rental](https://projectroicalc.com/portable-restroom-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.
- [Event Lighting Rental](https://projectroicalc.com/event-lighting-rental-cost): Unit count, rental days, and delivery as a planning total, not a shop quote.

## Project timelines
- [Bathroom Remodel](https://projectroicalc.com/how-long-bathroom-remodel): Working-day range for DIY vs professional. Not a contractor schedule.
- [Kitchen Remodel](https://projectroicalc.com/how-long-kitchen): Working-day range for DIY vs professional. Not a contractor schedule.
- [Deck](https://projectroicalc.com/how-long-deck): Working-day range for DIY vs professional. Not a contractor schedule.
- [Roofing](https://projectroicalc.com/how-long-roofing): Working-day range for DIY vs professional. Not a contractor schedule.
- [Painting](https://projectroicalc.com/how-long-paint): Working-day range for DIY vs professional. Not a contractor schedule.
- [Fence Installation](https://projectroicalc.com/how-long-fence): Working-day range for DIY vs professional. Not a contractor schedule.
- [Flooring Installation](https://projectroicalc.com/how-long-flooring): Working-day range for DIY vs professional. Not a contractor schedule.

## Tool rent vs buy
- [Air Compressor](https://projectroicalc.com/air-compressor): Rent vs buy break-even for this tool.
- [Airless Paint Sprayer](https://projectroicalc.com/airless-paint-sprayer): Rent vs buy break-even for this tool.
- [Angle Grinder](https://projectroicalc.com/angle-grinder): Rent vs buy break-even for this tool.
- [Auger](https://projectroicalc.com/power-auger): Rent vs buy break-even for this tool.
- [Belt Sander](https://projectroicalc.com/belt-sander): Rent vs buy break-even for this tool.
- [Bench Grinder](https://projectroicalc.com/bench-grinder): Rent vs buy break-even for this tool.

## Worth It / Payback
- [Are Business Subscriptions Worth It?](https://projectroicalc.com/business-subscription): Cost versus yearly value and payback.
- [Car Detailing](https://projectroicalc.com/car-detailing): Cost versus yearly value and payback.
- [Car Maintenance Plan](https://projectroicalc.com/car-maintenance-plan): Cost versus yearly value and payback.
- [Car Storage](https://projectroicalc.com/car-storage): Cost versus yearly value and payback.
- [Car Warranty](https://projectroicalc.com/car-warranty): Cost versus yearly value and payback.
- [Carpet Cleaning](https://projectroicalc.com/carpet-cleaning): Cost versus yearly value and payback.

## Optional

- [Complete calculator list](https://projectroicalc.com/llms-full.txt): Every public calculator URL, grouped by category
- [Sitemap](https://projectroicalc.com/sitemap.xml): Every public page