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Calcosy
Every calculator you need, completely free.
Calcosy is a free calculator hub with 175+ tools for math, finance, health, home improvement, pets, statistics, and everyday life. No account. No email. Just calculate. Covers everything from mortgage and BMI to roofing costs, chocolate toxicity for dogs, confidence intervals, and circle skirt fabric. Every calculator includes a plain-English explanation so you understand the result, not just the number.
Hey PH! 👋
I built Calcosy after getting frustrated with calculator sites that hide results behind signup walls and email popups. Just let me calculate.
A few things I'm proud of:
The home page has a working basic calculator right next to the search bar — no clicking needed
Every calculator has a plain-English explanation of the math, not just the formula
The pet calculators (chocolate toxicity for dogs, cat age, dog lifespan) were unexpectedly popular during testing
Home improvement is the most searched category — roofing, deck, solar panels, concrete
Happy to answer any questions about the tech stack (React + Vite + Supabase) or how I built 175 calculators without losing my mind.
What calculator should I add next? 🧮
About Calcosy on Product Hunt
“Every calculator you need, completely free.”
Calcosy was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #49 on the daily leaderboard. Calcosy is a free calculator hub with 175+ tools for math, finance, health, home improvement, pets, statistics, and everyday life. No account. No email. Just calculate. Covers everything from mortgage and BMI to roofing costs, chocolate toxicity for dogs, confidence intervals, and circle skirt fabric. Every calculator includes a plain-English explanation so you understand the result, not just the number.
On the analytics side, Calcosy competes within Productivity, Education and Finance — topics that collectively have 733.9k followers on Product Hunt. The dashboard above tracks how Calcosy performed against the three products that launched closest to it on the same day.
Who hunted Calcosy?
Calcosy was hunted by Soumya Samal. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Calcosy including community comment highlights and product details, visit the product overview.
Soumya Samal