Make expensive decisions with evidence

High-consideration choices

• Technology and subscriptionsSoftware, devices, services, hosting, and recurring costs.
• Career and educationJob offers, degrees, certifications, and career changes.
• Home, car and relocationTotal ownership cost, affordability, and location fit.
• Small businessStartup costs, break-even, tools, and business models.

The model explains. The math decides.

1. Define — name the options and what success means.
2. Weight — set the priorities that matter to you.
3. Compare — see the winner, margin, and sensitivity.
4. Learn — record the outcome and improve future choices.

Decision categories

Free decision tools

Interactive calculators with visible formulas — no signup required. Use them, link them, cite them.

• Affordability calculatorCan you afford the house, car, or move? Payment-to-income math with stress margins.
• Business profit calculatorRevenue, costs, break-even, and margin for a small-business idea.
• Website revenue calculatorThe traffic, RPM, and conversion assumptions behind online-income claims.
• Cost-of-living calculatorCompare monthly budgets between two cities or countries.
• Choice Score calculatorWeight your own criteria and score any decision 0–100.

The ChoiceScore Index — what our research-library data shows

Recent decision research

Recent public reports, each with its sources, calculations, assumptions, and limitations.

• Foucault Test Stand vs. Bath Interferometer for Amateur Primary Mirror GrindingBoth methods are viable, but for most amateur telescope makers the Foucault test stand offers a better balance of cost, simplicity, and sufficient precision.Choice Score: 80/100
• CS61C vs LFC210 for Backend Developers – Low‑Level Networking & Concurrency MasteryBoth courses offer valuable low‑level skills, but CS61C delivers deeper systems‑level theory and concurrency concepts, while LFC210 provides quicker, Linux‑focuChoice Score: 80/100
• Ergonomic Monitor Upgrade for Remote Knowledge WorkersBoth the LG 32UN880‑B Ergo and the Dell UltraSharp U3423WE can improve eye health and posture, but the LG ergonomic arm setup offers a stronger posture benefit,Choice Score: 80/100
• LED Modular vs Hybrid T5‑LED Lighting for Reef AquariumsFor most reef hobbyists, LED‑modular fixtures such as the EcoTech Radion XR30 G6 provide superior PAR uniformity, greater spectral programming flexibility, and Choice Score: 80/100
• Quartz vs Granite Countertops: Porosity, Maintenance, and Heat ResistanceBoth quartz and granite can serve a kitchen well. Quartz generally offers lower ongoing maintenance because of its engineered low porosity, while granite typicaChoice Score: 80/100
• Comparative Analysis: Residential Amenities vs. Increased Square FootageDeciding between an apartment with on-site amenities and one offering greater square footage requires a structured evaluation of lifestyle utility and total cosChoice Score: 80/100
• Hardwood vs. Tile Flooring for Kitchens: A Decision AnalysisThe choice between hardwood and tile in a kitchen is not governed by a universal rule but by the specific properties of the chosen product and the homeowner's wChoice Score: 80/100
• Canva vs. Adobe Express for Social Media BrandingChoosing between Canva and Adobe Express for social media branding necessitates a clear understanding of the functional design philosophy behind each platform. Choice Score: 80/100
• Electric Vans vs Diesel Vans – 5‑Year Fleet Replacement TCO AnalysisFor a typical mid‑size delivery fleet, electric vans deliver a lower 5‑year TCO than diesel vans when realistic electricity prices, mileage, and residual‑value Choice Score: 80/100