The Master Suite for Business, Finance & Creators
Instant precision calculators to price inventory, optimize 1099 taxes, quote sponsorships, analyze rental deals, and accelerate compound wealth.
eBay Profit Calculator
Calculates managed payment fees, store subscription discounts, and net payout profit.
Etsy Fee Calculator
Solves 6.5% transaction fees, 3%+25¢ processing, and offsite ad fee deductions.
Poshmark Fee Calculator
Calculates $2.95 under-$15 flat fees vs 20% commission with seller shipping discounts.
Sneaker Payout Solver
Compares StockX vs GOAT vs eBay sneaker seller payouts and shoe size conversion.
1099 Self-Employment Tax Calc
Calculates 15.3% SE tax, federal bracket solver, state tax, and quarterly 1040-ES payments.
Freelance Hourly & Day Rate Solver
Solves target income, billable hours capacity, overhead reserves, and project rates.
Instant PDF Invoice Generator
Zero-login vector PDF invoice and payment receipt maker with printable layout.
Landed Cost Per Unit Solver
Calculates factory EXW, ocean freight per CBM, customs duty %, and domestic trucking.
Inventory Reorder Point & Safety Stock
Solves lead time demand and delay safety stock buffers to prevent FBA stockouts.
YouTube Money & RPM Solver
Estimates channel earnings across 12 content niches ($1.50–$28.00 RPM) and Shorts.
Sponsorship & Brand Deal Rate Card
Calculates brand quoting prices, paid ad whitelisting multipliers, and bundle quotes.
TikTok Creator Rewards RPM
Solves 60s+ qualified For You Page views, RPM tiers ($0.40–$1.30), and monthly payouts.
Rental Cash Flow & Cap Rate Solver
Calculates monthly net cash flow, Cap Rate %, Cash-on-Cash Return %, and annual NOI.
BRRRR Refinance & Equity Recycler
Calculates cash-out refinance equity, cash left in deal, and infinite ROI extraction.
Airbnb vs Long-Term Rental Solver
Compares nightly rates, occupancy %, cleaning fees, and furnishing payback periods.
Compound Interest Growth Simulator
Simulates monthly deposits, exponential compounding, and inflation-adjusted real value.
Coast FIRE Milestone Solver
Determines when compounding funds your retirement with $0 more saved.
Dividend Snowball & DRIP Yield
Simulates reinvestment growth, annual dividend hikes, and Yield on Cost (YOC).
Bitcoin & Crypto DCA Profit Solver
Simulates recurring purchases, satoshis stacked, and compounding CAGR returns.
Crypto Staking APY & Validator Rewards
Calculates Proof-of-Stake compound yields and validator commission fees.
TDEE & Macro Split Solver
Calculates daily calorie needs, BMR, and gram targets for protein, fats, and carbs.
1-Rep Max Strength Matrix
Estimates 1RM using Brzycki and Epley formulas with a full percentage load table.
LLM & AI API Token Cost Estimator
Calculates monthly AI token costs across GPT-4o, Claude 3.5, Gemini, and Llama 3.
SaaS Cash Runway & Burn Rate Solver
Calculates startup net monthly cash burn, MRR growth, and zero-cash milestone date.
Auto Loan & Early Payoff Solver
Calculates monthly payment, total interest charges, and early principal payoff savings.
Used Car Flipping Profit Solver
Models auction purchase prices, repair budgets, DMV title fees, and resale margins.
EV vs Gas Annual Cost Comparison
Compares gas MPG vs home electricity rates to calculate 5-year fuel savings.
Dog Food Calorie & Raw Feeding Solver
Calculates daily RER/DER caloric needs, dry kibble cups, and BARF 80/10/10 meat ratios.
Pet Age in Human Years & Longevity Curve
Converts dog and cat age to human years using AVMA breed size biological curves.
Lifetime Pet Cost & Vet Budget Planner
Calculates 14-year lifetime ownership expenses across food, routine vet care, and insurance.
Geo-Arbitrage & Cost of Living Solver
Calculates monthly savings and purchasing power moving from US tech hubs to Bali or Lisbon.
IRS FEIE 330-Day Physical Presence Tax
Models foreign earned income exemption up to $126,500 for digital nomads living abroad.
Global Timezone Overlap Coordinator
Finds shared golden working meeting hours across San Francisco, London, Bali, and Tokyo.
Solar Panel Payoff & 25-Year ROI Solver
Calculates 30% IRS solar tax credits, net system cost, and payback period to breakeven.
Solar Battery & Powerwall Outage Solver
Models blackout runtime hours and daily solar recharging cycles for home backup.
Solar Cash Purchase vs Loan vs PPA
Compares 25-year lifetime wealth creation across cash, solar loans, and PPA contracts.
Wedding Budget & Category Solver
Models venue, catering, photo, and floral allocations with exact cost per guest.
Wedding Bar & Alcohol Consumption Estimator
Calculates exact bottles of wine, beer cases, and liquor needed for reception drinks.
Wedding Vendor Tipping & Gratuity Solver
Calculates standard etiquette tips and organizes cash envelopes for wedding vendors.
Subscription Audit & S&P 500 Opportunity Cost
Calculates monthly app drain and 10-year compound wealth lost by not investing.
Family Plan vs Individual Split Optimizer
Calculates per-person savings and group annual totals sharing multi-user accounts.
Subscription Cancellation Letter Generator
Generates legal cancellation notices and emails revoking recurring auto-debit authority.
Van Life vs Apartment Rent Solver
Models true monthly gas, insurance, camping fees vs city rent and house down payment timelines.
12V/24V Off-Grid Wire Gauge & Fuse Solver
Calculates AWG wire sizes, voltage drop percentages, and fuse ratings for camper electrical.
DIY Camper Van & Tiny House Build Budget
Estimates solar, insulation, plumbing, and cabinetry costs with market resale equity.
Heat Pump vs Gas & Oil Payoff Solver
Models annual heating bill savings, $2,000 IRA 25C tax credit, and net breakeven timeline.
Home BTU & HVAC Tonnage Sizing Solver
Calculates whole-home heating/cooling load and heat pump tonnage without short-cycling.
Smart Thermostat Energy Savings Solver
Calculates utility savings and hardware payback from sleep and away temperature setbacks.
Boat Total Cost of Ownership Solver
Models annual marina slip fees, winterization, insurance, fuel, and cost per day on water.
Marine Fuel Economy & Cruising Range Solver
Calculates vessel MPG, fuel cost per nautical mile, and safe range using USCG 1/3 rule.
Trolling Motor Battery Sizing & Runtime
Calculates hours on the water and amp draw comparing Lithium LiFePO4 vs Lead-Acid marine batteries.
AI GPU Cloud Inference & Training Cost Solver
Compare NVIDIA H100/A100 cloud cluster rates, token burn, and 60% savings vs AWS/GCP.
Serverless AWS Lambda vs Container Cost Solver
Calculates exact traffic threshold where Lambda functions become more expensive than ECS/K8s.
Fixed Index Annuity & Lifetime Income Solver
Calculates guaranteed GLWB retirement income, roll-up base compounding, and lifetime payouts.
Term vs Whole Life Insurance & S&P 500 Wealth
Compare premiums and calculate wealth accumulated by buying Term Life and investing the difference.
LLM Token & AI Inference Cost Estimator
Compare OpenAI GPT-4o, Claude 3.5 Sonnet, DeepSeek V3/R1, and Gemini monthly token bills.
AI System Prompt & Schema Architect
Build production-grade system prompts, role personas, and strict JSON schemas for LLM agents.
S-Corp vs LLC Self-Employment Tax Savings
Calculate self-employment tax savings, reasonable W-2 salary, and net FICA cash preserved.
1031 Exchange Tax Deferral & Timeline Solver
Calculate capital gains deferred and generate 45-day ID and 180-day closing deadlines.
HSA Triple-Tax-Advantage & Wealth Solver
Calculate 2026 contribution limits, FICA tax shields, and compound tax-free stock growth.
HDHP + HSA vs Traditional PPO Health Plan Solver
Compare total annual out-of-pocket costs, employer match, and net insurance premium savings.
FAA Part 107 Commercial Drone Pricing Solver
Calculate minimum billable hourly rate, photo/video package pricing, and equipment depreciation.
Drone LiPo Battery Cycle & Fleet TCO Solver
Calculate cost per flight minute, battery retirement cycles, and monthly replacement reserves.
Startup Equity Dilution & SAFE Note Solver
Calculate founder equity retention, pre vs post-money SAFE conversions, and Series A option pools.
USPTO Trademark & IP Filing Cost Estimator
Calculate official USPTO government class fees, legal preparation costs, and statement of use fees.
ADU Build Cost & Monthly Rental Income Solver
Calculate garage conversion vs detached ADU build costs, loan payments, and net monthly rental cash flow.
Drywall, Paint & Concrete Material Estimator
Calculate paint gallons, standard 4x8 drywall sheets, and concrete cubic yards by room square footage.