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MoneyCrunchLab
25 free calculators - your numbers never leave your browser
Free interactive calculators for mortgages, debt payoff, savings, and retirement. Every tool runs entirely in your browser (your numbers never leave it), states its assumptions next to the results, and can be embedded on any website with one line of HTML.
I built MoneyCrunchLab after noticing that most financial calculators online are either ad-walled quiz funnels or worked examples with someone else's numbers.
So I made 25 interactive calculators (mortgages, debt payoff, savings, retirement) with a few stubborn design constraints:
• Everything computes in your browser — the numbers you type never leave it. No sign-up, no account. • Every calculator states its assumptions next to the results, and shows the losing side of a trade-off when there is one (rent-vs-buy will happily tell you renting wins). • Each tool can be embedded on any site with one line of HTML, free, with no ads inside the widget. • The math is verified against closed-form financial formulas before publication.
If you find a number that looks wrong, tell me — I'll show the math or fix it. Happy to answer anything!
Love that every calculator shows its assumptions right next to the results, way more useful than the black-box tools I've tried before.
Showing the assumptions next to results is a really nice touch, way more honest than most calculators. One idea: let me save a scenario with my own labels so I can compare "rent longer vs buy now" or "pay extra on card A vs card B" side by side without retyping everything. That would make the embed on my blog way more useful too.
Tried the mortgage calculator and loved that it shows every assumption right next to the numbers. The one-line embed is a nice touch too.
Love that everything runs client-side, the privacy angle is a nice differentiator. One thing that would help a lot: let me save a scenario with a shareable link or short code so I can send my partner my exact mortgage numbers without them retyping everything.
About MoneyCrunchLab on Product Hunt
“25 free calculators - your numbers never leave your browser”
MoneyCrunchLab was submitted on Product Hunt and earned 13 upvotes and 10 comments, placing #76 on the daily leaderboard. Free interactive calculators for mortgages, debt payoff, savings, and retirement. Every tool runs entirely in your browser (your numbers never leave it), states its assumptions next to the results, and can be embedded on any website with one line of HTML.
MoneyCrunchLab was featured in Fintech (47.3k followers), Money (4.6k followers) and Personal Finance (2.9k followers) on Product Hunt. Together, these topics include over 26.8k products, making this a competitive space to launch in.
Who hunted MoneyCrunchLab?
MoneyCrunchLab was hunted by Pierre-Antoine BEUGNOT. 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.
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Pierre-Antoine BEUGNOT
Hi Product Hunt 👋
I built MoneyCrunchLab after noticing that most financial calculators online are either ad-walled quiz funnels or worked examples with someone else's numbers.
So I made 25 interactive calculators (mortgages, debt payoff, savings, retirement) with a few stubborn design constraints:
• Everything computes in your browser — the numbers you type never leave it. No sign-up, no account.
• Every calculator states its assumptions next to the results, and shows the losing side of a trade-off when there is one (rent-vs-buy will happily tell you renting wins).
• Each tool can be embedded on any site with one line of HTML, free, with no ads inside the widget.
• The math is verified against closed-form financial formulas before publication.
If you find a number that looks wrong, tell me — I'll show the math or fix it. Happy to answer anything!