Age
Calculate exact age in years, months, weeks, days, and hours between any two dates.
Everyday Calculators (7 tools)
Free calculators for common everyday math — dates, times, conversions, and life admin. No signup, no tracking, no email collection. More tools being added regularly.
All everyday calculators
Time Zone
Convert time between any two US or world time zones. Daylight saving handled automatically.
New
Currency Converter
Convert US dollars to any world currency with live exchange rates. Supports 25+ currencies.
New
Unit Converter
Convert length, weight, temperature, volume, area, speed, and data between US and metric units.
New
Tip Calculator
Calculate tip amount, total bill, and per-person split for any group size.
NewPopular
Discount
Percent off, stacked discounts, and sales tax — see your sale price and total savings instantly.
NewPopular
Date
Days between two dates, or add and subtract days from a date to find the result and day of week.
New
About these calculators
This category covers everyday utility tools — things you reach for occasionally but want to get exactly right when you do. Everything runs in your browser. Nothing is sent to a server, no account needed, no data collected.
The Age Calculator handles calendar arithmetic correctly: leap years, varying month lengths, and the calendar-vs-decimal distinction. The Time Zone Calculator converts between 19 US and world time zones with automatic DST handling — useful for scheduling international calls and meetings. The Currency Converter fetches live exchange rates hourly and supports 25+ currencies with a USD quick-reference strip. The Unit Converter covers 7 categories — length, weight, temperature, volume, area, speed, and data — with CSV export for offline use. The Discount Calculator handles percent-off, stacked coupons, and post-discount sales tax in one pass. The Date Calculator finds the days, weeks, and business days between two dates, or adds and subtracts days from a date to find the resulting day of the week.
This category is growing — more everyday tools will be added in upcoming phases based on what people search for and what's genuinely useful.
Other categories
- Financial Calculators — mortgage, loans, retirement, 401(k)
- Education Calculators — GPA, SAT, ACT, study hours
- Health Calculators — BMI, calorie/TDEE, body fat, due date