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Convert between time units, Unix timestamps, and date formats. Calculate date differences and durations with precision.
About this tool
Convert between time units, Unix timestamps, and date formats. Calculate date differences and durations with precision.
Date / Time Conversions is a free calculator tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Date / Time Conversions on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Enter what you know and see an accurate result immediately — no formulas or spreadsheets required.
Adjust the inputs to see exactly how each change affects the outcome before you decide.
Take a clear, precise number into your plans, reports, or conversations.
Yes — Date / Time Conversions is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Date / Time Conversions runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Convert between time units, Unix timestamps, and date formats. Calculate date differences and durations with precision. It's built for quick, everyday calculator tasks with results you can copy or download straight away.
Yes — Date / Time Conversions works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.