Calculators
Planning & time calculators
Plan dates, working time, savings timelines, and everyday time differences without spreadsheet setup.
Calculators in this category
Time calculator
See date difference, business days, and worked time with breaks and pay.
Savings goal calculator
See how many months it takes to reach a goal with monthly saving and interest.
Conception date calculator
Estimate a conception date from a due date, last period, ultrasound, or birth date, with a likely ±5 day window.
Baby due date calculator
Estimate a due date from your last period, conception date, IVF transfer, or an ultrasound, with current pregnancy week and trimester.
Age Calculator
Work out an exact age in years, months and days. Enter a date of birth and choose today, a future date or a past date.
Unit converter
Convert length, weight, area and volume in one shared tool.
When these tools help
Use the time calculator when you need days between dates, business days, worked hours, or a quick pay estimate from a shift. Use the savings goal calculator when the real question is how many months a plan will take rather than how many days are on the calendar. Conception date, due date, and age calculators are here because they are also date-based, but they answer very different questions: pregnancy timing, likely due dates, and exact age at a chosen date. The unit converter is included for practical planning cases such as turning feet into metres or pounds into kilograms while you work through a schedule, form, or checklist.