Calculate the difference between dates, add or subtract time periods, and find dates in the past or future. Perfect for planning events, calculating age, project timelines, and time duration analysis.
If any part of this tool is not working properly, please let us know.
Our free online date calculator is a versatile tool designed to make date and time calculations simple. Whether you are planning an event, managing projects, calculating your exact age, or just curious about a specific day, this tool provides quick and accurate results.
The calculator comes with four powerful features: Date Duration, Add/Subtract Dates, Age Calculator, and Weekday Finder. All calculations happen instantly in your browser, ensuring your data stays private and secure.
Choose from Date Duration, Add/Subtract, Age Calculator, or Weekday Finder depending on what you want to calculate.
Pick the required dates (and times if needed). The tool provides instant results based on your input.
See detailed calculations including total years, months, days, weekdays, and more. Use quick options for faster results like "This Week" or "Next Birthday".
You can calculate date durations, add/subtract time (years/months/days), find exact age (with or without birth time), and discover weekdays or next occurrences — all in one tool.
No. All calculations happen 100% in your browser. Your dates, birth info, or event plans never leave your device — no tracking, no storage, no third-party access. Fully private and secure.
Never. It’s completely free — no registration, no ads, no premium tiers. Just open the page and start calculating dates instantly on any device.
Extremely accurate. It calculates years, months, and days precisely — and if you enable time, it even factors in hours and minutes for ultra-precise age down to the second.
Yes. Toggle “Include Time” to add hours and minutes. Perfect for calculating exact project durations, flight times, or countdowns with precision.
Find what day any date falls on (e.g., “What day was I born?”) or find the next occurrence of a specific weekday (e.g., “When’s the next Friday after June 1?”).
Yes. The calculator uses JavaScript’s built-in Date object, which automatically accounts for leap years, month lengths, and timezone offsets — no manual adjustments needed.
Absolutely. Works for any date within JavaScript’s supported range (typically year 1 to 9999). Great for historical research, long-term planning, or sci-fi worldbuilding.
Yes. Once loaded, all features work without internet. Ideal for secure environments, travel, or when you need to calculate dates on the go.
Project managers, event planners, HR teams, students, parents, developers, travelers, and anyone tracking deadlines, birthdays, anniversaries, or timelines — personal or professional use.
Yes. Free for any use — no attribution or license required. Many businesses use it for scheduling, payroll, age verification, and project management.
Contact us via support form. We welcome feedback — whether it’s adding time zones, recurring date patterns, export to calendar, or holiday-aware calculations.