Precision Calculators & Interactive Simulators for High-Stakes Decisions
Instant, zero-latency computational tools across AI infrastructure, corporate finance, civil engineering, DevOps, and B2B software TCO. Every formula is transparently documented and peer-reviewed.
Browse by Discipline (5 Silos)
5 Quantitative Disciplines • 20 Interactive ModelsAI, LLM & Cloud Infrastructure Calculators
Precision VRAM sizing, LLM API token cost simulators, cloud GPU break-even analyzers, and RAG vector storage estimators for engineers and CTOs.
Tax, Wealth & Corporate Finance Simulators
Multi-variable financial modeling: self-employed tax optimization, mortgage payoff vs. S&P 500 equity indexing, inflation-adjusted FIRE, and SaaS unit economics.
Construction, Solar & Engineering Estimators
Contractor-grade material volume and cost estimators: concrete slabs & cylindrical footings, epoxy floor coating kits, off-grid solar battery banks, and HVAC BTU sizing.
Client-Side Data, Network & DevOps Utilities
100% client-side privacy tools for systems engineers: AWS/GCP CIDR subnet planners, JSON/CSV payload bandwidth calculators, database storage estimators, and JWT/ SLA analyzers.
B2B Software, Cloud & Automation TCO Comparisons
Uncover hidden enterprise pricing tiers: compare Zapier vs. Make vs. self-hosted n8n, Stripe vs. LemonSqueezy fees, Vercel vs. Cloudflare bandwidth, and Auth0 vs. Clerk MAU costs.
LLM VRAM & GPU Cluster Sizing Calculator (2026)
Calculate exact GPU memory (VRAM) requirements for Llama-4, DeepSeek-V3, Qwen, and Mistral across FP16, INT8, and GGUF Q4_K_M quantization with KV-cache overhead.
LLM API Token Cost & Prompt Caching Simulator (2026)
Forecast monthly AI API bills across OpenAI GPT-4o/5, Claude Sonnet, and DeepSeek. Simulate prompt caching discounts, daily active requests, and per-user unit economics.
Cloud GPU Rental vs. Local AI Workstation ROI Calculator
Calculate the exact break-even month between renting cloud GPUs (AWS, RunPod) and buying on-premise hardware factoring in kWh electricity and utilization.
RAG Vector Database RAM & Index Cost Calculator (HNSW)
Estimate exact RAM and disk requirements for Pinecone, Qdrant, Milvus, and pgvector. Account for embedding dimensions (1536/3072), HNSW graph links, and scalar quantization.
Freelancer Sole Proprietor vs. S-Corp / LLC Tax Simulator (2026)
Compare net take-home pay between sole proprietorship (1099) and S-Corp/LLC corporate structures by splitting reasonable officer salary and dividend distributions.
Early Mortgage Payoff vs. S&P 500 Index Investing Simulator
Should you put extra monthly cash toward paying off your mortgage early or investing in low-cost index funds? Compare guaranteed interest saved vs. after-tax portfolio growth.
Inflation-Adjusted FIRE & Safe Withdrawal Rate Simulator
Calculate your exact Financial Independence (FIRE) target number and years to retirement using real (inflation-adjusted) compounding and customizable Safe Withdrawal Rates (3.25%–4.0%).
SaaS LTV:CAC Ratio & Gross Margin Payback Period Calculator
Benchmark your startup unit economics against VC Series A/B standards: compute Gross-Margin Adjusted LTV, LTV:CAC multiple, and exact CAC Payback months.
Concrete Slab & Footing Volume, Bags & Ready-Mix Cost Calculator
Calculate exact concrete volume in cubic yards and cubic meters (m³), 80lb / 25kg pre-mix bag counts, and ready-mix truck delivery costs with adjustable spillage waste factor.
Epoxy Floor Coating Resin Volume (Gallons / Liters) & Cost Calculator
Calculate exact 100%-solids epoxy resin liters/gallons required for primer, base coat, metallic/flake layer, and polyurethane topcoat based on floor area and mil/mm thickness.
Solar Panel Array, LiFePO4 Battery Bank & ROI Payback Calculator
Size your solar PV kilowatt (kWp) array and LiFePO4 battery storage (kWh) from daily consumption, peak sun hours, and autonomy needs—plus calculate utility bill payback.
HVAC Heat Pump & Air Conditioner BTU, Tonnage & kW Sizing Calculator
Calculate exact thermal cooling/heating load in BTU/hr, HVAC refrigeration tons, and kilowatts (kW) factoring in floor area, ceiling height, insulation quality, and solar exposure.
CIDR Subnet Mask & Cloud VPC Usable IP Address Calculator
Calculate total IPv4 addresses, AWS/GCP/Azure VPC reserved IPs, usable Kubernetes pod hosts, and subnet splitting from any CIDR prefix (/8 to /30).
REST/GraphQL API Payload Size, Bandwidth & Cloud Egress Cost Calculator
Calculate monthly terabytes (TB) transferred, required throughput in Mbps, and AWS/Vercel/Cloudflare egress bills with Gzip/Brotli compression savings.
PostgreSQL / MySQL Database Disk Size, B-Tree Index & RAM Calculator
Estimate total NVMe SSD storage, PostgreSQL 23-byte tuple header overhead, B-Tree index footprint, WAL bloat, and recommended shared_buffers RAM.
SLA Uptime ("Nines") Allowed Downtime & Breach Penalty Calculator
Convert SLA percentages (99.9% to 99.999%) into exact allowed downtime minutes per month/year and calculate enterprise contract credit penalties for outage breaches.
Zapier vs. Make.com vs. Self-Hosted n8n Monthly Cost Calculator
Calculate exact monthly automation bills based on daily workflow triggers and multi-step actions. Compare Zapier task pricing vs. Make operations vs. a $12/mo n8n VPS.
Stripe vs. Merchant of Record (Paddle / LemonSqueezy) Net Fee Calculator
Compare total payment processing fees: Stripe base 2.9% + $0.30 + Stripe Tax + international FX cards vs. all-inclusive 5% + $0.50 Merchant of Record platforms.
Vercel Pro vs. Cloudflare Pages / Workers vs. AWS Hosting Cost Calculator
Calculate monthly frontend & serverless hosting bills across team seats, terabytes of Fast Data Transfer (bandwidth), and millions of Edge/Serverless invocations.
Auth0 vs. Clerk vs. Supabase Auth Monthly Active Users (MAU) Cost Calculator
Compare identity and authentication bills at scale: simulate 10K to 500K Monthly Active Users (MAU) and enterprise SAML/OIDC SSO connections across Auth0, Clerk, and Supabase.