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).
163 free, accurate online calculators for payroll, finance, health, GPA, construction, and more. All 50 US states covered. No sign-up. Updated for 2025-26.
I built CalculatorFlux because every calculator site I used was either buried in ads, locked behind a signup, or just gave wrong results.
The idea was simple: build every calculator from scratch, verify the formulas against official sources (IRS, ADA, WHO), and make them all free with no strings attached.
Started with payroll calculators for all 50 US states, then expanded into finance, health, construction, math, and food. 166 tools later, every single one runs in your browser. Your numbers never touch a server.
No ads. No accounts. No paywalls. Just accurate tools that work.
Would love to hear which calculator you find most useful, and if there is one missing that you need, let me know in the comments.
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About CalculatorFlux on Product Hunt
“166 free calculators. No ads. No signup. Ever.”
CalculatorFlux was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #94 on the daily leaderboard. 163 free, accurate online calculators for payroll, finance, health, GPA, construction, and more. All 50 US states covered. No sign-up. Updated for 2025-26.
CalculatorFlux was featured in Health & Fitness (82.8k followers), Productivity (653.8k followers) and Education (78.7k followers) on Product Hunt. Together, these topics include over 195.3k products, making this a competitive space to launch in.
Who hunted CalculatorFlux?
CalculatorFlux was hunted by Calculator Flux. 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 CalculatorFlux stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Calculator Flux