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TCalc.it
The calculator that actually understands time
TCalc.it parses almost any time format — just type how you think about time: "2h 30m + 45m" → 3h 15m · "14:30 to 16:45" → 2h 15m · "22:00 to 6:00" → 8h (overnight) · "NOW + 90d" → deadline date · "01:00:00:12f24" → SMPTE timecode · "1737100000UNIX" → readable date. Type-safe: knows durations vs dates, so you never get nonsense. 15+ formats: decimal hours, FPS timecodes, ISO 8601. 6 modes for HR, film, dev, logistics & accounting. PWA with cloud sync. Android out now, iOS soon.
Hey Product Hunt! I built TCalc.it because I was tired of converting time to decimals to do basic math.
I'm a developer, and I kept running into the same problem — adding sprint hours, converting timestamps, calculating deadlines. Every tool out there made me think in decimals instead of actual time. So I built a calculator that just gets it.
Type "2h 30m + 45m" and you get "3h 15m". Type "17:30 - 09:00 - 30m" and you get your work hours. It parses almost anything
— durations, dates, timecodes, UNIX timestamps, even "NOW".
TCalc.it knows the difference between a duration (a span of time) and a datetime (a point in time). So it won't let you add two dates together
I built 6 specialized modes for the people who deal with time the most: HR teams calculating overtime, film editors working with timecodes, devs converting timestamps, truckers tracking driving limits, and more. Each mode comes with custom buttons and converters tailored to that workflow, but is fully customizable.
It's free to use with a Pro tier for unlimited customization and cloud sync. Would love your feedback — what time calculations drive you crazy?
About TCalc.it on Product Hunt
“The calculator that actually understands time”
TCalc.it was submitted on Product Hunt and earned 16 upvotes and 12 comments, placing #64 on the daily leaderboard. TCalc.it parses almost any time format — just type how you think about time: "2h 30m + 45m" → 3h 15m · "14:30 to 16:45" → 2h 15m · "22:00 to 6:00" → 8h (overnight) · "NOW + 90d" → deadline date · "01:00:00:12f24" → SMPTE timecode · "1737100000UNIX" → readable date. Type-safe: knows durations vs dates, so you never get nonsense. 15+ formats: decimal hours, FPS timecodes, ISO 8601. 6 modes for HR, film, dev, logistics & accounting. PWA with cloud sync. Android out now, iOS soon.
On the analytics side, TCalc.it competes within Productivity, Time Tracking and Developer Tools — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how TCalc.it performed against the three products that launched closest to it on the same day.
Who hunted TCalc.it?
TCalc.it was hunted by Michal. 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 TCalc.it including community comment highlights and product details, visit the product overview.
Michal