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).
Chalk Calculator
Calculators that show their work. No signup, no tracking.
Free, fast and accurate calculators for pay, mortgages, loans, home projects, cars and everyday math. No signup, no clutter — your numbers never leave your device.
I kept ending up on calculator sites that give you a number and nothing else. No formula, no assumptions, no way to check whether the answer applies to you. Some of them are quietly wrong.
So Chalk Calculator shows its work. Every page has the formula, a worked example with real numbers, the assumptions it made, and the part I think matters most, what it cannot tell you.
Two decisions shaped it.
Privacy is architectural, not a policy. There's no server. It's a static export on a CDN, so there is no endpoint that could receive what you type. Salary, loan amounts, card balances they live in browser memory and nowhere else. Sharing a result copies plain text rather than a link, because a URL with your salary in it ends up in browser history and server logs.
Happy to answer anything, and genuinely interested in which calculators are missing, or if any information is incorrect!
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About Chalk Calculator on Product Hunt
“Calculators that show their work. No signup, no tracking.”
Chalk Calculator was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #160 on the daily leaderboard. Free, fast and accurate calculators for pay, mortgages, loans, home projects, cars and everyday math. No signup, no clutter — your numbers never leave your device.
Chalk Calculator was featured in Web App (123.8k followers), Productivity (661.2k followers) and Finance (6.3k followers) on Product Hunt. Together, these topics include over 205.8k products, making this a competitive space to launch in.
Who hunted Chalk Calculator?
Chalk Calculator was hunted by Jordan . 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 Chalk Calculator stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Jordan