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Calculate exact age in years, months, and days. Find date differences, countdowns, zodiac signs, and detailed time breakdowns
Calculate aspect ratios, resize dimensions while maintaining proportions. Common presets for video, photo, mobile screens, and social media
Advanced calculator with scientific functions and history
Add, subtract, and convert time values without the headache of base-60 arithmetic. Enter durations in hours, minutes, and seconds, then add or subtract them to get a precise total. The converter handles unit changes between seconds, minutes, hours, and days.
Sum work hours across shifts to get weekly totals.
Calculate total event duration from a list of segment times.
Add lap times or compute pace differences between workouts.
Yes. The calculator handles any duration — there is no 24-hour cap.
Enter values as HH:MM:SS, or fill in the hours, minutes, and seconds fields separately.
The tool works with whole seconds. For sub-second precision, convert milliseconds to decimal seconds before entering.
All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.