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UniversalCalc
Free calculators for money, health and everyday math
24 free online calculators in English and Spanish: take-home pay and self-employment tax, loans, mortgage, compound interest, BMI, calories, ovulation, running pace, days between dates and more. No sign-up and nothing to install. Every calculator shows the formula and the official figures behind the result, with worked examples, and any calculation can be shared as a link.
Hi Product Hunt! I built UniversalCalc because most calculator sites bury the answer under pop-ups, sign-up walls and numbers you can't check.
So every calculator here works the same way: you type your numbers, you get the result instantly, and right below it you see the formula and the data it uses, like the 2026 IRS tax brackets for the paycheck calculator. No account, no app, and you can share any calculation as a link.
It started in Spanish and now has 21 calculators in English too. I'd love to know which calculator you'd like to see next, and if you spot a number that looks wrong, please tell me!
About UniversalCalc on Product Hunt
“Free calculators for money, health and everyday math”
UniversalCalc was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #160 on the daily leaderboard. 24 free online calculators in English and Spanish: take-home pay and self-employment tax, loans, mortgage, compound interest, BMI, calories, ovulation, running pace, days between dates and more. No sign-up and nothing to install. Every calculator shows the formula and the official figures behind the result, with worked examples, and any calculation can be shared as a link.
On the analytics side, UniversalCalc competes within Health & Fitness, Productivity and Personal Finance — topics that collectively have 747.4k followers on Product Hunt. The dashboard above tracks how UniversalCalc performed against the three products that launched closest to it on the same day.
Who hunted UniversalCalc?
UniversalCalc was hunted by Izan. 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.
For a complete overview of UniversalCalc including community comment highlights and product details, visit the product overview.
Izan