This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
calculate.at is a free collection of 200+ online calculators — finance, health, math, conversions, construction, science, and date/time. No signup, no ads cluttering results. Every calculator shows the formula and a worked example, not just the answer.
Hey Product Hunt! 👋
I built calculate.at because most calculator sites bury the actual math under ads, popups, and forced signups. This is the opposite: pick a calculator, get your answer, and see exactly how it was calculated — formula and worked example included.
245 calculators across 7 categories: Finance (56), Conversion (43), Health (37), Math (35), Construction (28), Science (28), Date & Time (18). Every one has a short ID (e.g. CA‑0130) so you can search or share by number.
No accounts, no email capture, no premium tier — just fast, static pages that load instantly.
Would love feedback on which calculators to add next!
@calculate_at - This is so cool, free and no friction at all to use. Simple and clean and some interesting calculators to, some I would never even have considered. Awesome work, and I hope you launch goes well. What would be awesome would be a plugin/extension for tools like @raycast , @Google Chrome , @Safari and @Alfred
About calculate.at on Product Hunt
“200+ free calculators. No signup, no clutter.”
calculate.at was submitted on Product Hunt and earned 3 upvotes and 4 comments, placing #68 on the daily leaderboard. calculate.at is a free collection of 200+ online calculators — finance, health, math, conversions, construction, science, and date/time. No signup, no ads cluttering results. Every calculator shows the formula and a worked example, not just the answer.
calculate.at was featured in Productivity (656.9k followers), Education (78.9k followers) and Finance (6.1k followers) on Product Hunt. Together, these topics include over 185k products, making this a competitive space to launch in.
Who hunted calculate.at?
calculate.at was hunted by calculate at. 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.
Want to see how calculate.at stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
calculate at