Everyday & Time
Handy everyday tools: tip calculator, age calculator, date and time math, gas mileage and more. Quick answers for the small calculations that come up at dinner, on the road and on the calendar.
Popular in this category: Tip Calculator, Budget Calculator, Age Calculator
Tip Calculator
Calculate the tip and split the bill between people
Budget Calculator
Split your monthly income into needs, wants and savings with the 50/30/20 rule
Age Calculator
Calculate your exact age in years, months and days
Date Calculator
Add or subtract days and find the duration between dates
Time Calculator
Add, subtract and convert hours, minutes and seconds
Hours Calculator
Calculate hours worked between two times
Gas Mileage Calculator
Calculate your MPG and fuel cost per trip
Fuel Cost Calculator
Estimate the fuel cost of a trip
Golf Handicap Calculator
Calculate your golf handicap index
Countdown Calculator
Count days, hours and minutes to a future date
Business Days Calculator
Count working days between two dates
Week Number Calculator
Find the ISO week number for any date
Roman Numeral Converter
Convert numbers to and from Roman numerals
Random Number Generator
Generate random numbers in any range
Speed Distance Time Calculator
Solve for speed, distance or time
Cooking Converter
Convert cups, ounces, grams and more for recipes
Tire Size Calculator
Compare tire sizes and diameter differences
Face Shape Calculator
Determine your face shape from facial measurements
Dog Age Calculator
Convert your dogโs age to human years by size
Date and Time Calculator
Add or subtract days, hours and minutes from a date and time
Aspect Ratio Calculator
Find an aspect ratio or resize dimensions proportionally
Scrap Gold Calculator
Melt value of scrap gold by weight, karat and spot price
Gear Ratio Calculator
Gear ratio, output speed and torque from tooth counts
Time Zone Calculator
Convert a time between US and world time zones
Cumulative GPA Calculator
Combine semester GPAs and credits into a cumulative GPA
GPA to Percentage Calculator
Convert GPA to percentage and letter grade on the 4.0 scale
Age Difference Calculator
Age gap between two people in years, months and days
Dog Weight Calculator
Estimate a puppy's adult weight from its age and current weight
PPI Calculator
Pixels per inch of a screen from resolution and diagonal size
Win Rate Calculator
Win percentage from wins, losses and ties
Julian Date Converter
Convert between calendar dates and Julian day numbers
Change Calculator
Change due in bills and coins
Biorhythm Calculator
Physical, emotional and intellectual biorhythm cycles
Birthday Calculator
Day of the week you were born and days to your next birthday
Elo Rating Calculator
Elo rating change after a game or tournament
Towing Capacity Calculator
How much your truck can tow and haul
Stopping Distance Calculator
Reaction and braking distance at any speed
EV Charging Calculator
Charging time and cost for an electric car
EV vs Gas Calculator
Fuel cost of an electric car vs. a gas car
Natural Gas Cost Calculator
Gas bill from therms or CCF and your rate
Flight Time Calculator
Flight duration and arrival time across time zones
Dew Point Calculator
Dew point and relative humidity from temperature
Wedding Budget Calculator
Split a wedding budget across vendors and guests
Allowance Calculator
Kids allowance by age, chores and saving goals
Moving Cost Calculator
Estimate the cost of a local or long-distance move
Coffee Ratio Calculator
Coffee to water ratio for any brew method
Car Depreciation Calculator
Estimate what your car will be worth over time
Calendars and holidays
2026 Calendar
Printable 2026 calendar with federal holidays and week numbers
2027 Calendar
Printable 2027 calendar with federal holidays and week numbers
Federal Holidays 2026
All 11 federal holidays with observed dates and long weekends
Federal Holidays 2027
All 11 federal holidays with observed dates and long weekends
Easter 2027
Easter Sunday 2027, how the date is set and a 10-year table
Mother's Day 2027
Mother's Day 2027 date and the rule behind it
Mardi Gras 2027
Mardi Gras 2027 date, Ash Wednesday and the Easter link
About everyday & time calculators
Everyday calculators at a glance
The Tip Calculator splits a restaurant bill and gratuity between any number of people. The Age Calculator and Date Calculator handle exact durations and dates, while the Gas Mileage and Fuel Cost calculators turn miles and gallons into MPG and trip cost.
What you need to enter
These tools are deliberately simple: a bill amount and tip percentage, two dates, or miles driven and fuel used. Nothing is stored: every result is computed in your browser the moment you type, so you can adjust and recompute as often as you like.
A worked example
On an $80 dinner bill, an 18% tip is $14.40, bringing the total to $94.40. Split four ways, that is $23.60 per person. The Tip Calculator lets you round the total up or down and re-splits the amount automatically, which is handy when the table wants an even number.
Frequently asked questions
What tip percentage is standard in the U.S.?
For sit-down restaurant service, 15-20% of the pre-tax bill is customary, with 18% a common default. The Tip Calculator lets you set any percentage and split the total between people.
How does the Age Calculator count leap years?
It compares the two calendar dates directly, so leap days are counted correctly. The result is your exact age in years, months and days rather than a rounded figure.
Is my data saved when I use these tools?
No. Every calculation happens in your browser and nothing is sent to a server or stored, so amounts, dates and trips stay private.