ToolGrid AIFree Productivity Tools
24 free tools
Timers, stopwatches, prompt builders, planners and focus helpers for studying and working more deliberately. Use them to break work into focused sessions, plan time across a day, or write clearer instructions for AI assistants.
24 matching tools
Weekday CounterCount Monday–Friday dates after a start date through an end date.Add Working DaysMove a date forward by Monday–Friday working days, excluding holidays only if you account for them separately.Day of Week FinderFind the weekday for a specific calendar date.Leap Year CheckerCheck a Gregorian year and its number of calendar days.Days in MonthFind the number of days in a selected calendar month and year.ISO Week NumberFind the ISO week number and week-year for a date.Day of Year CalculatorFind a date’s ordinal day number and remaining days in that year.Next Birthday DateFind the next occurrence of a birthday after a reference date.Midpoint Between DatesFind the calendar date halfway between two dates.Add Calendar MonthsShift a date by whole months while clamping to the last valid day of the destination month.Add Minutes to a Clock TimeMove a 24-hour time forward or backward by a number of minutes.Work Shift HoursCalculate one shift’s elapsed time and paid hours after an unpaid break.Decimal Hours to Hours and MinutesConvert decimal hours into rounded hours and minutes.Hours and Minutes to DecimalConvert duration hours and minutes into decimal hours.Fixed UTC Offset ConverterConvert a clock time between two explicitly supplied UTC offsets.Meeting Availability OverlapFind the overlap between two same-day availability windows in one timezone.Sleep Window PlannerCalculate a bedtime from a wake time and a sleep-duration assumption.Study Time AllocationDivide available study minutes across subjects in proportion to topic counts.Daily Task CapacityEstimate how many equal-duration tasks fit after breaks.Habit Completion RateMeasure the percentage of planned habit sessions completed.Random Choice PickerSelect an entry from a list with browser-generated secure randomness.Stopwatch with LapsTime an activity and record laps using a monotonic clock.Pomodoro Timer25-minute focus sessions with short and long breaks.AI Prompt BuilderBuild a clear, structured prompt for ChatGPT, Claude or Gemini.
Tips for better results
- Keep the tab open for timers to keep running reliably.
- Short focus sessions with real breaks usually beat long unplanned stretches.
- Save prompts that work well so you can reuse them.