Date & Life Calculators
Some life questions don't have obvious dollar signs attached — until you do the math. This category brings together tools for the personal milestones and planning challenges that don't fit neatly into a spreadsheet: how old am I exactly, how far can I run in a target pace, what does it actually cost to move across the country, and what will raising a child set me back over 18 years?
The age calculator gives your exact age in years, months, days, and even hours — useful for anything from insurance forms to milestone celebrations. The date calculator adds and subtracts days from any date, calculates the number of working days between two dates, and handles deadline math for project planning or legal timelines.
Runners and cyclists will find the pace calculator useful for race planning — convert between min/mile, min/km, and mph, calculate your finish time at a given pace, or find the pace you need to hit a time goal. It covers everything from 5K to marathon distances.
The big-picture tools are the relocation cost calculator — which estimates moving van costs, security deposits, and the salary premium you'd need when moving between US cities — and the child cost calculator, which uses USDA methodology to estimate the $300,000+ average cost of raising a child to age 18 in the United States, broken down by category.
Featured Calculators
Age Calculator
Your exact age in years, months, days, and hours — plus next birthday countdown.
FeaturedDate Calculator
Add or subtract days, calculate working days, and find the gap between any two dates.
FeaturedPace Calculator
Running and cycling pace converter: min/mile, min/km, finish time, and target pace.
FeaturedRelocation Cost Calculator
Estimate moving costs, deposits, and cost-of-living adjustment for US city relocations.
FeaturedChild Cost Calculator
Full cost breakdown of raising a child to 18 using USDA data — housing, food, education, and more.
Age Calculator
Calculate your exact age in years, months, days, and hours.
Date Calculator
Add or subtract days from dates and find days between dates.
Pace Calculator
Convert between pace and speed for running and cycling.
Relocation Cost Calculator
Estimate all costs of moving to a new city or country.
Child Cost Calculator
Estimate the total cost of raising a child from birth to adulthood.
Frequently Asked Questions
- How is age calculated exactly?
- Our Age Calculator computes your exact age by counting complete years, then remaining months, then remaining days from your birth date to today (or any target date). It accounts for varying month lengths and leap years correctly. For example, if you were born on March 15, 1990, and today is April 10, 2026, you are exactly 36 years, 0 months, and 26 days old. The calculator also shows your age in total days, hours, and minutes, plus a countdown to your next birthday. This level of precision is useful for insurance forms, legal documents, and milestone celebrations.
- What life cost calculators are available?
- We offer two major life cost planning tools. The Relocation Cost Calculator estimates the total expense of moving between cities — including moving company costs, security deposits, real estate agent fees, temporary housing, and cost-of-living adjustments. It helps you understand the salary premium you would need when relocating. The Child Cost Calculator uses USDA methodology to estimate that raising a child to age 18 in the United States costs over $300,000 on average, broken down by category: housing, food, childcare, education, transportation, healthcare, clothing, and miscellaneous expenses.
- How does the Pace Calculator work for race planning?
- The Pace Calculator converts between three common formats: minutes per mile (min/mi), minutes per kilometer (min/km), and miles or kilometers per hour. Enter any one and get the others instantly. For race planning, you can enter your target finish time and race distance (5K, 10K, half marathon, or marathon) to find the pace you need to maintain. Alternatively, enter your current training pace to see your projected finish time. It covers all standard distances and lets you enter custom distances too — useful for trail runs or ultra marathons with non-standard courses.
- Can the Date Calculator handle business days and working days?
- Yes. The Date Calculator includes a working days mode that counts only Monday-through-Friday business days between two dates, excluding weekends. This is particularly useful for calculating project timelines, contract deadlines, legal notice periods, and delivery schedules. For example, if you need to know when a 30 business day review period ends, enter your start date and 30 working days to get the exact end date. Note that the calculator does not account for public holidays since these vary by country and region — so for critical legal deadlines, add a small buffer.