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Date Difference CalculatorCalculate day, week, month, and year differences from total day counts.Score 58datecalculatorPeriod Date CalculatorEstimate upcoming period dates from your last period start date, cycle length, and period duration.Score 58datecalculatorAge CalculatorCalculate exact age in years, months, days, total days, and next birthday countdown.Score 54calculatordatePregnancy Due Date CalculatorEstimate days to due date from current pregnancy week and day.Score 50datecalculatorMenstrual Cycle CalculatorEstimate next period date, ovulation date, fertile window, and cycle timeline from the last period start date.Score 44calculatordateDays to Weeks CalculatorConvert days into weeks and months.Score 42calculatordateDeadline CalculatorEstimate deadline offset from start day, duration, review buffer, and weekend/holiday adjustment.Score 42calculatordateMinutes to Hours CalculatorConvert minutes into hours and days.Score 34calculatordateDeadline Buffer CalculatorCalculate remaining buffer days before a deadline.Score 34calculatordateTime Zone Offset CalculatorEstimate destination hour from current hour and time zone offset.Score 34calculatordateFuel Cost CalculatorEstimate advanced trip fuel cost with distance modes, efficiency units, fuel price units, emissions, commute projections, and vehicle comparisons.Score 32calculatorScientific CalculatorUse a keyboard-friendly scientific calculator with trig, logs, powers, constants, and memory.Score 32calculatorProgrammable CalculatorUse editable variables for reusable formula-style calculations.Score 30calculatorBusiness Days CalculatorEstimate business days from calendar days and weekend days.Score 24calculatordateWork Hours CalculatorCalculate work hours after breaks, overtime, and shift count.Score 24calculatordateOvertime CalculatorCalculate overtime hours and pay from total hours, regular threshold, rate, and multiplier.Score 24calculatordateContract Duration CalculatorCalculate contract duration from months, renewal terms, notice period, and extension days.Score 24calculatordateNotice Period CalculatorEstimate notice-period end offset using calendar days, working-day adjustment, and handover buffer.Score 24calculatordateRamadan Countdown CalculatorCalculate days remaining to a target Ramadan date from current day number.Score 24calculatordateFertile Window CalculatorEstimate fertile window and approximate ovulation date from cycle timing.Score 24calculatordate