
Free Financial Calculators 2026 - Mortgage, Tax, Retirement, Debt
Calculate mortgages, taxes, retirement, and more using 470+ free financial calculators.
@AfridiMunir · X
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Calculate mortgages, taxes, retirement, and more using 470+ free financial calculators.
@AfridiMunir · X

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

Calculate how much meetings and work projects actually cost your company per day.
@mafaldateles_ · X
My first web app is out! I built a tiny tool to help answer a simple question: could that meeting have been an email? You decide.

Simulate portfolio withdrawals using a three-bucket strategy.
@mvo_guy_travis · X
I've noticed an explosion of new (free) financial tools from relatively amateur sources. Is this the vibe coded future?

Interactive guide and calculator for Adopt Me pets, showing aging needs, XP totals, and grinding strategies.
@JevanP86180 · X
Check out what I just built with Lovable! ADOPT ME AGE UP GUIDE! #adoptme #roblox #lovable

Free calculators for DIY home projects like woodworking, decks, concrete, and drywall.
u/CaboWabo55 · Reddit
Built a DIY calculator site in a weekend — betting on "boring tools" over content After my last project (an AI debate platform) got rejected by AdSense for "low value content," I went the opposite direction: no content treadmill, no AI features, no backend. Just genuinely useful calculators. studandslab.com — 10 free calculators for woodworking and home projects (board feet, stair stringers, concrete, drywall). Everything runs client-side, so hosting is free and every visitor costs me $0.

Free Indian financial calculators for SIP, EMI, FD, GST, salary, HRA with financial health scoring and live currency/gold/crypto rates.
@paisatools · X

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

Calculate your dog's age using breed-specific scientific formulas (AKC, UC Davis, and more).
leolee829111 · V2EX
做了个狗龄计算器,才发现"1 狗年 = 7 人年"是错的 家里养了只金毛,一直按"狗 1 岁 = 人 7 岁"算,后来查资料发现这个公式根本不科学——狗的第一年其实相当于人的 15 岁左右,而且不同体型的狗衰老速度差很远。 于是做了个工具:dogyearcalc.com ( https://dogyearcalc.com/) 它做了什么: - 内置 4 种计算公式:AKC 体型公式、UC Davis 表观遗传时钟(测 DNA 甲基化得出的)、Standard 方法、以及那个不科学的 Classic 7x 方法(留着做对比) - 支持 386+ 犬种的品种特异性计算,大型犬和小型犬的衰老曲线完全不同 - 多狗对比模式——家里养了两只以上的可以并排看 - 生命阶段可视化 + 当前阶段的健康建议 - 8 种语言(中英日韩德西法葡) 技术方面: 纯静态站,HTML + CSS + 原生 JS ,部署在 Cloudflare Pages 。没有框架,没有注册,加载速度 89ms 。计算全部前端完成,不收集任何数据。 想听听大家的意见: 1. UI

Track monthly expenses in multiple currencies with automatic browser-based data storage.
lowsell · V2EX
做了个每月支出统计工具 方便统计各种按月\按年支出的各种货币单位。 https://www.jser.com/g/monthly-expense-calculator

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

Calculate your Mayan calendar date, Dreamspell kin, and 13 Moon position.
@huangzekai003 · X
Codex helped me turn an idea into a real product as a solo developer. I used it to research, design, test, and launch a Mayan calendar website with accurate calculations and AI reports. Built with Codex. Shipped by one person. #Codex