Simple calculators for everyday questions.
CalcsDaily is a collection of free, fast, no-signup calculators and converters for the small things you need to figure out.
Date & Time
Days Between Dates
Count the exact days between any two dates.
Birthday Day Finder
Discover what day you were born, your famous birthday twins, and what happened in history that day.
Age Calculator
Find your exact age in years, months, and days, plus a countdown to your next birthday.
Work Days Calculator
Count business days between two dates, with optional holiday exclusions.
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from any date.
Week Number Calculator
Find the ISO week number for any date, or look up the full date range for any week number.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates, or pick a date and get its Unix timestamp — in seconds and milliseconds.
Leap Year Checker
Check if any year is a leap year and find the next or previous leap year.
Time Zone Converter
Convert a date and time between any two time zones instantly.
Time Duration Calculator
Calculate the exact duration between two times in hours, minutes, and seconds — including overnight spans.
Countdown Timer
Live day/hour/minute/second countdown to any future date and time.
Decimal Hours Converter
Convert between decimal hours and hours & minutes instantly.
Date Format Converter
See any date in every common format instantly — ISO 8601, US, EU, Unix timestamp, ordinal, relative, and more.
Quarter Calculator
Find which quarter a date falls in, with fiscal year support.
Date Difference in Weeks & Months
Find the difference between two dates in weeks and months — ideal for pregnancy, recovery, and baby milestones.
Date Calculator with Recurring Events
Generate a list of repeating dates for billing cycles, pay periods, recurring payments, and appointment schedules.
Math
Calculator
Free online calculator for everyday math.
Scientific Calculator
Scientific calculator with trig, logs, powers, and more.
Area Calculator
Calculate area for 12 shapes with unit conversion.
Volume Calculator
Calculate volume for 11 3D shapes with unit conversion.
Percentage Calculator
Find percentages, percent change, and discounts in 6 modes.
Finance
Balance Transfer Calculator
See if moving high-interest credit card debt to a low/0% APR card actually saves you money.
Balance Transfer Bridge Calculator
See if temporarily bridging a HELOC or line of credit with a 0% balance transfer actually saves you interest.
Inflation Calculator
See what an amount of money from one year is worth in another year's dollars.