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60 projects
Model your equity, taxes, and net worth with free calculators and paid scenario planning.
charleswcho · HN
Continuum – Financial simulations for DIY multimillionaires
Create and download professional PDF invoices with your logo and tax calculations.
@jcolementor · X
Fast free invoice generator for small businesses
Calculate SIP & lumpsum mutual fund returns with LTCG/STCG tax in seconds. Free forever. No ads. Covers equity, debt & hybrid funds. Built for Indian investors.
@RahulGupta8999 · X
Just shipped 🚀 Free SIP & lumpsum calculator for Indian investors with actual LTCG/STCG tax breakdown. No ads. No sign-up. Forever free. Would love your feedback! 🙏🇮🇳 #BuildInPublic #MutualFunds #SIP
Free calculators to help homebuyers understand their offer before submitting.
u/Offer-Buildr · Reddit
I built a free suite of home offer calculators because I felt that most mortgage calculators answer the wrong question I started and run a small free tool called "Offer Buildr" that helps homebuyers understand an offer before their agent writes it. The core builder turns a listing price into true monthly cost and cash to close, then walks the ten decisions in an offer and prints a one page summary to hand your agent. Last week I shipped the piece I wish I had started with: five single-ques
Use free calculators for construction, 3D printing, materials, and development tasks.
@rabeekit · X
🚀 Just launched RabeeKit! Free online calculators & generators: 🧱 Construction 🖨️ 3D Printing 👶 Name Generator 📄 Fake Data 🎨 Paint Calculator Fast. Free. No signup. 🌐 Feedback is welcome! 🚀 #buildinpublic #indiehackers #webdev
Collection of 125+ free calculators for finance, health, legal, real estate, and travel—no signup required.
@Arafat3599651 · X
Just launched 🧮 125+ free calculators — mortgage, BMI, debt payoff, compound interest, calories & more. No signup. No ads. Everything runs in your browser instantly. #buildinpublic #webdev #react
Use 100+ free online calculators for math, chemistry, physics, loans, health, and AI costs—no signup needed.
u/averageChilean · Reddit
Built a free tool site to help my brother study — now has 100+ tools, would love feedback My brother's in high school and needed something more visual to study chemistry, physics, and math, so I used Claude to build him a simple site with interactive calculators and visualizers. I'm not a programmer or from a tech background, so without AI this wouldn't have happened, at least not this fast. It ended up helping him a lot more than I expected, so I kept expanding it, added a bunch of other
Free Etsy profit calculator that includes fees, offsite ads, materials, packaging and your labor. Compare pricing scenarios and export PDF/CSV — no signup.
@5150_MadMan · X
Check out what I just built with Lovable!
Calculate how a raise affects your income after benefits cliffs.
@getpapi_ai · X
placed 3rd in the r/vibecoding vibejam 2026. It made me go viral in r/ohio It was my first ever jam entry, I'm also not a developer...or from Ohio. was planned, reviewed, shipped and currently managed by
All-in-one platform for calculating EMIs, taxes, mutual funds, stock trading, rent vs buy, and retirement planning.
@sarkar68154 · X
Just launched FinoSphere Pro and the feedback on Product Hunt is 🔥 [ Free all-in-one finance calculator 👇 #buildinpublic #finance
Free payroll calculator for Indian HR teams, calculating EPF, ESI, PT, TDS, and salary breakdowns.
@TusharArora89 · X
A free LOP splitter, salary proration, and PF ECR file generator for Indian payroll teams. Built around my own day job in payroll. No login, no ads. Already getting real usage across 8+ countries.
Instant calculators for estimating construction materials like roofing, concrete, gravel, paint, deck, and fence.
@TridibS79303970 · X
Just shipped the first tool for BuildCalcHub Roofing Calculator is now live. Building a collection of free construction calculators—one tool at a time. Next: Concrete, Gravel, Paint, Deck, Fence & Tile. 🔗 #buildinpublic #indiedev #webdev #opensouce
