
Free Business Calculators 2026 | Profit Margin, Break-Even & Tax Tools | BizCalc
Use 32+ free calculators for business metrics like profit margin, break-even, and self-employment taxes.
@BizCalcLab · X
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Use 32+ free calculators for business metrics like profit margin, break-even, and self-employment taxes.
@BizCalcLab · X

Scan broken and for-parts listings to find profitable flips with calculated margins.
@Brokefixflip · X
This site will print you money

Connect your Amazon seller account to optimize listings and reduce ad spend.
@adeelimrani · X

Visualize your stock option offer value across growth scenarios to understand your vesting timeline.
@HRSuccessCentre · X
Nobody explains the vesting cliff until you've already signed. So here it is in 30 seconds — the wait, the cliff, the drip 🍯 See your own timeline: #Tech #Vesting #Stocks #Recruiting #FreeTool #Builder #VibeCoding

Trading journal to log trades and track equity curves, win streaks, and performance analytics.
@NimraWeb3 · X
So I vibe coded my own with Lovable TradeBook. Log trades w/ session, killzone, model, grade, R:R + screenshots, track multiple accounts, get a real dashboard (equity curve, win streaks, pair/session breakdowns). Demo: GitHub:

Analyze Shopify and DTC sales data to find hidden profit leaks by SKU.
@okiela_io · X
Sales up but profit unclear? I help ecommerce sellers find hidden profit leaks by SKU. Send me 1 order export → 3 leaks:

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

Unify revenue from Stripe, Paddle, Polar, and Dodo Payments to track progress toward your MRR goals.
@Ranjith_Snifty · X
TargetMRR helps to reach your targeted MRR.

Monitor Core Web Vitals and measure how slowdowns impact your revenue.
@AuditJet · X

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

Track brokerage splits, tax reserves, mileage, and take-home pay for real estate commissions.
u/dayngerous78 · Reddit
Sharing my side project - Real Estate Commission Planner Highly doubt anyone here would have use for this specific niche app but this is for sharing side projects so decided to share mine to other builders. The stack is pretty simple with tailwind, nextjs, supabase with google auth. My wife is a real estate agent and the tough part are keeping up with GCI vs net, taxes, expenses and even year over year stats. This handles it all. A lot of brokerages have software to use for th

Track live crop prices, record harvests, and manage farm operations in one platform.
@Agrolease · X