CalcForge

AI wizard for precise material estimates with what-if simulations

Score: 8.1/10United StatesMedium BuildReady to Spawn
Brand Colors

The Opportunity

Problem

Construction tech students are frustrated by inaccurate and unintuitive material estimation software that hinders beginners' learning of cost management.

Solution

CalcForge uses an intuitive step-by-step wizard powered by AI to generate accurate estimates while explaining decisions. Students run what-if scenarios on variables like material swaps or price changes to deeply understand cost dynamics. It demystifies estimation for beginners with transparent, educational AI.

Target Audience

Construction technology students, especially beginners learning cost management

Differentiator

What-if simulations with AI explanations provide deeper learning than static tools.

Brand Voice

professional

Features

Step-by-Step Wizard

must-have18h

Guided input for project specs leading to auto-estimate

What-If Simulator

must-have25h

Test scenarios like 'what if lumber prices rise 20%'

AI Explanations

must-have30h

Natural language breakdowns of calculations and assumptions

Scenario Library

must-have12h

Saved simulations for review and sharing

Cost Sensitivity Chart

must-have15h

Visual graphs showing impact of variables

Import Blueprints

nice-to-have20h

Upload simple images for auto-suggestions

Team Sharing

nice-to-have10h

Collaborate on estimates

Price Database Sync

nice-to-have15h

Live regional material prices

Total Build Time: 145 hours

Database Schema

users

ColumnTypeNullable
iduuidNo
emailtextNo
created_attimestampNo

scenarios

ColumnTypeNullable
iduuidNo
user_iduuidNo
nametextNo
paramsjsonbNo
base_costintYes

Relationships:

  • user_id references users(id)

simulations

ColumnTypeNullable
iduuidNo
scenario_iduuidNo
variables_changedjsonbNo
new_costintNo
explanationtextYes

Relationships:

  • scenario_id references scenarios(id)

API Endpoints

POST
/api/wizard/estimate

Generate base estimate from inputs

🔒 Auth Required
POST
/api/simulations

Run what-if simulation

🔒 Auth Required
GET
/api/scenarios

List user scenarios

🔒 Auth Required
POST
/api/charts

Generate sensitivity data

🔒 Auth Required

Tech Stack

Frontend
Next.js 14 + Tailwind CSS + Shadcn/ui + Recharts
Backend
Next.js API routes + Supabase Edge
Database
Supabase Postgres
Auth
Supabase Auth
Payments
Stripe
Hosting
Vercel
Additional Tools
OpenAI API for explanations

Build Timeline

Week 1: Wizard core

40h
  • Auth/DB
  • Wizard UI
  • Base calc logic

Week 2: AI integration

50h
  • Estimate endpoint
  • AI explanations
  • Scenario save

Week 3: What-if and charts

45h
  • Simulation engine
  • Charts viz
  • Sensitivity

Week 4: UI/UX polish

35h
  • Responsive design
  • Payments
  • Landing

Week 5: Testing/deploy

30h
  • API tests
  • Error handling
  • Vercel deploy
Total Timeline: 5 weeks • 218 hours

Pricing Tiers

Free

$0/mo

No AI explanations

  • 5 scenarios
  • Basic what-ifs
  • Charts

Pro

$25/mo
  • Unlimited scenarios
  • Full AI
  • Advanced sims

Enterprise

$149/mo
  • All Pro
  • API access
  • Custom pricing data
  • Priority support

Revenue Projections

MonthUsersConversionMRRARR
Month 11803.5%$160$1,920
Month 61,1009%$2,475$29,700

Unit Economics

$18
CAC
$350
LTV
4%
Churn
82%
Margin
LTV:CAC Ratio: 19.4xExcellent!

Landing Page Copy

Simulate & Learn Construction Costs with AI

CalcForge's wizard and what-if tools make estimation intuitive and educational for students.

Feature Highlights

Step-by-step AI guidance
Powerful what-if scenarios
Visual cost sensitivity
Transparent explanations
Scenario library

Social Proof (Placeholders)

"'What-ifs changed how I think' - Emily S."
"'AI tutor for costs' - Raj P."
"'Essential for my coursework' - Dr. Kim"

First Three Customers

Validate with Typeform on LinkedIn construction educator groups. Offer lifetime Pro to first 3 responders. Launch free tier in student Slack communities from top schools.

Launch Channels

Product Huntr/Constructionr/EdTechLinkedInTwitter #ConstructionTech

SEO Keywords

construction what-if cost simulatorAI material estimation studentbuild cost sensitivity analysisconstruction wizard estimatorlearn material costing AI

Competitive Analysis

$20+/mo
Strength

Quantity takeoff

Weakness

Limited sims, no education

Our Advantage

AI learning layer

$5000+/yr
Strength

Enterprise accuracy

Weakness

Overkill for students

Our Advantage

Affordable, sim-focused

🏰 Moat Strategy

AI fine-tuned on user simulations for better regional accuracy over time.

⏰ Why Now?

AI accessibility enables edtech personalization as construction enrollment surges.

Risks & Mitigation

technicalmedium severity

AI costs/hallucinations

Mitigation

Hybrid rule+AI, prompt engineering

financiallow severity

OpenAI API expenses

Mitigation

Usage caps in free tier

marketmedium severity

AI skepticism in trades

Mitigation

Transparent sourcing

Validation Roadmap

pre-build7 days

AI demo video feedback

Success: 60% want to pay

mvp14 days

10 user interviews

Success: Repeat usage

growth30 days

Affiliate program

Success: 20% referral growth

Pivot Options

  • Pro contractor what-if tool
  • Supply chain sim for logistics
  • Real estate dev cost model

Quick Stats

Build Time
218h
Target MRR (6 mo)
$4,500
Market Size
$45.0M
Features
8
Database Tables
3
API Endpoints
4
CalcForge - Complete Startup Blueprint | Startup Tribunal | StartupTribunal