Free calculators to help you make smarter decisions about your tech spending, AI tools, and energy costs. No sign-up required.
See exactly how much you’d save switching to an electric vehicle — fuel costs, maintenance savings, and 5-year ROI based on your actual driving habits.
Select your plans across ChatGPT, Claude, Copilot, Gemini, and more — and see your exact monthly and annual AI subscription spend.
Is your AI subscription actually paying off? Enter your hourly rate and time saved per week to calculate your exact dollar-value ROI.
Add all your software subscriptions and instantly see your total monthly and annual SaaS spend — and identify which tools are draining your budget.
No sign-up, no paywall, no email required. Every calculator on Kentralis is free to use, forever.
All calculations happen in your browser. We don’t store or transmit any of the data you enter.
Built on current pricing and real-world data — not theoretical models that don’t match your actual costs.