A growing family of niche calculators built on actual government data, real prices, and 2026 industry research. No sign-ups, no fluff.
Free capital gains calculators for US, UK, Germany, Canada and Australia. Real 2025 tax brackets, every source cited.
Will solar pay for itself at your address? NREL irradiance, EIA rates, 30% federal ITC, state incentives. Real numbers per US state.
Wedding budget by guest count. Painting cost DIY vs pro. Renovation ROI. Designed to be saved, shared, and pinned.
Most online calculators are spam. They pull a number from thin air, gate the result behind your email, and send you to a "matching service" you didn't ask for. Ours don't. Every input is yours. Every output is sourced. Every line is researched.
IRS, HMRC, EIA, NREL, Cost vs Value Report, The Knot Real Wedding Study. Sources cited at every page.
Calculators run client-side. You see the answer immediately. No "enter your email to view results."
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FI legacy: aurinkopaneelit, kattoremontti (paused, kept for SEO).